Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "classification" wg kryterium: Temat


Tytuł:
Panoramic radiograph – a useful tool to assess the difficulty in extraction of third molars
Autorzy:
Adamska, Paulina
Adamski, Łukasz Jan
Musiał, Dominika
Tylek, Katarzyna
Studniarek, Michał
Wychowański, Piotr
Kaczoruk-Wieremczuk, Magdalena
Pyrzowska, Dorota
Jereczek-Fossa, Barbara Alicja
Starzyńska, Anna
Tematy:
Archer classification
Pell and Gregory classification
IAN classification
Pederson scale
Winter classification
Pokaż więcej
Wydawca:
Gdański Uniwersytet Medyczny
Powiązania:
https://bibliotekanauki.pl/articles/1196787.pdf  Link otwiera się w nowym oknie
Opis:
Introduction: Third molars (TMs) are the most frequently impacted teeth due to the frequent lack of space in the dental arch resulting in their malposition or inability to erupt. Partially erupted TMs that cause recurrent inflammatory conditions must be removed. The aim of this study was to assess TM position on panoramic radiographs. Materials and methods: We evaluated 200 panoramic radiographs of patients 18-72 years of age. Teeth were assessed in terms of the presence of dental follicle, cervix/root ratio and root development stage. Maxillary TMs were assessed using the Archer and Pell and Gregory classifications, whereas the mandibular ones according to Pell and Gregory, Winter, IAN and Pederson classifications. Results: 622 TMs were assessed. In the maxilla, the most common type was A-positioned, vertically angulated TM with completely formed root/roots. In the mandible, the most common type was A1-positio- ned, mesioangular TM with completely formed root/roots and without enlarged follicle. According to Pederson’s index, 59.44% TMs were moderately difficult to extract. Most roots were in contact with inferior alveolar nerve. Conclusions: The use of the classifications mentioned above is helpful in assessment of the surgery difficulty level. In the long term this allows to increase the predictability of the procedure and minimize the intra- and post-operative complications.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Panoramic radiograph – a useful tool to assess the difficulty in extraction of third molars
Autorzy:
Pyrzowska, Dorota
Kaczoruk-Wieremczuk, Magdalena
Adamska, Paulina
Tylek, Katarzyna
Wychowański, Piotr
Jereczek-Fossa, Barbara Alicja
Studniarek, Michał
Starzyńska, Anna
Adamski, Łukasz Jan
Musiał, Dominika
Wydawca:
Medical University of Gdańsk
Cytata wydawnicza:
Adamska P, Adamski ŁJ, Musiał D, Tylek K, Studniarek M, Wychowański P, Kaczoruk-Wieremczuk M, Pyrzowska D, Jereczek-Fossa BA, Starzyńska A. Panoramic radiograph – a useful tool to assess the difficulty in extraction of third molars. Eur J Transl Clin Med. 2020;3(2):44-52. DOI: 10.31373/ejtcm/126928
Opis:
Introduction: Third molars (TMs) are the most frequently impacted teeth due to the frequent lack of space in the dental arch resulting in their malposition or inability to erupt. Partially erupted TMs that cause recurrent inflammatory conditions must be removed. The aim of this study was to assess TM position on panoramic radiographs. Materials and methods: We evaluated 200 panoramic radiographs of patients 18-72 years of age. Teeth were assessed in terms of the presence of dental follicle, cervix/root ratio and root development stage. Maxillary TMs were assessed using the Archer and Pell and Gregory classifications, whereas the mandibular ones according to Pell and Gregory, Winter, IAN and Pederson classifications. Results: 622 TMs were assessed. In the maxilla, the most common type was A-positioned, vertically angulated TM with completely formed root/roots. In the mandible, the most common type was A1-positioned, mesioangular TM with completely formed root/roots and without enlarged follicle. According to Pederson’s index, 59.44% TMs were moderately difficult to extract. Most roots were in contact with inferior alveolar nerve. Conclusions: The use of the classifications mentioned above is helpful in assessment of the surgery difficulty level. In the long term this allows to increase the predictability of the procedure and minimize the intra- and post-operative complications.
Dostawca treści:
Repozytorium Centrum Otwartej Nauki
Artykuł
Tytuł:
Panoramic radiograph – a useful tool to assess the difficulty in extraction of third molars
Autorzy:
Pyrzowska, Dorota
Kaczoruk-Wieremczuk, Magdalena
Adamska, Paulina
Tylek, Katarzyna
Wychowański, Piotr
Jereczek-Fossa, Barbara Alicja
Studniarek, Michał
Starzyńska, Anna
Adamski, Łukasz Jan
Musiał, Dominika
Wydawca:
Medical University of Gdańsk
Cytata wydawnicza:
Adamska P, Adamski ŁJ, Musiał D, Tylek K, Studniarek M, Wychowański P, Kaczoruk-Wieremczuk M, Pyrzowska D, Jereczek-Fossa BA, Starzyńska A. Panoramic radiograph – a useful tool to assess the difficulty in extraction of third molars. Eur J Transl Clin Med. 2020;3(2):44-52. DOI: 10.31373/ejtcm/126928
Opis:
Introduction Third molars (TMs) are the most frequently impacted teeth due to the frequent lack of space in the dental arch resulting in their malposition or inability to erupt. Partially erupted TMs that cause recurrent inflammatory conditions must be removed. The aim of this study was to assess TM position on panoramic radiographs. Materials and methods We evaluated 200 panoramic radiographs of patients 18-72 years of age. Teeth were assessed in terms of the presence of dental follicle, cervix/root ratio and root development stage. Maxillary TMs were assessed using the Archer and Pell and Gregory classifications, whereas the mandibular ones according to Pell and Gregory, Winter, IAN and Pederson classifications. Results 622 TMs were assessed. In the maxilla, the most common type was A-positioned, vertically angulated TM with completely formed root/roots. In the mandible, the most common type was A1-positio- ned, mesioangular TM with completely formed root/roots and without enlarged follicle. According to Pederson’s index, 59.44% TMs were moderately difficult to extract. Most roots were in contact with inferior alveolar nerve. Conclusions The use of the classifications mentioned above is helpful in assessment of the surgery difficulty level. In the long term this allows to increase the predictability of the procedure and minimize the intra- and post-operative complications.
Dostawca treści:
Repozytorium Centrum Otwartej Nauki
Artykuł
Tytuł:
Detection of source code in internet texts using automatically generated machine learning models
Autorzy:
Badurowicz, Marcin
Tematy:
source code
binary classification
text classification
AutoML
Pokaż więcej
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Powiązania:
https://bibliotekanauki.pl/articles/2097432.pdf  Link otwiera się w nowym oknie
Opis:
In the paper, the authors are presenting the outcome of web scraping software allowing for the automated classification of source code. The software system was prepared for a discussion forum for software developers to find fragments of source code that were published without marking them as code snippets. The analyzer software is using a Machine Learning binary classification model for differentiating between a programming language source code and highly technical text about software. The analyzer model was prepared using the AutoML subsystem without human intervention and fine-tuning and its accuracy in a described problem exceeds 95%. The analyzer based on the automatically generated model has been deployed and after the first year of continuous operation, its False Positive Rate is less than 3%. The similar process may be introduced in document management in software development process, where automatic tagging and search for code or pseudo-code may be useful for archiving purposes.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kin term patterns and language familie
Autorzy:
Pericliev, Vladimir Borissov
Tematy:
kin term patterns
language classification
computational classification
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Slawistyki PAN
Powiązania:
https://bibliotekanauki.pl/articles/677285.pdf  Link otwiera się w nowym oknie
Opis:
Kin term patterns and language familieThe anthropologist G. P. Murdock has found a strong correlation between the kin term patterns (or feature-values) for the relative (feature) “sibling” and language families. This important finding for language classification, however, has not been pursued further. In particular, it has not yet been tested whether the kin term patterns domain as a whole, including the patterns for other features (“grandparents”, “uncles”, “aunts”, “nephews and nieces”, etc.), is sufficient to demarcate all language families from one another. This paper presents a large-scale computational profiling of all language families in terms of their kin term patterns. The most significant findings are: (i) that language families can be quite neatly differentiated on the basis of their kin term patterns, and therefore these patterns may be considered as strong indicators of genetic affiliation, and (ii) that the kin term patterns for the features “nephews and nieces (= siblings' children)”, “siblings”, and “siblings-in-law” - i.e. all features including the idea of siblings - are the best predictors of genetic affiliation, as they are significantly more frequently used in the profiles than any other feature.  Modele terminologii powinowactwa i pokrewieństwa a rodzina językowaAntropolog G. P. Murdock odkrył silny związek między modelami powinowactwa i pokrewieństwa dla krewnych (rodzeństwa) a rodzinami językowymi. To ważne odkrycie w klasyfikacji języków nie było odpowiednio dalej wykorzystywane. W szczególności nie sprawdzono jeszcze, czy domena modeli powinowactwa i pokrewieństwa jako całości, w tym modele dla innych cech („dziadkowie”, „wujkowie”, „ciotki”, „siostrzeńcy i siostrzenice” itp.) są wystarczająco ukształtowane we wszystkich rodzinach językowych. W niniejszym artykule przedstawiono profilowanie komputerowe na dużą skalę wszystkich rodzin językowych pod kątem ich modeli powinowactwa i pokrewieństwa. Najważniejsze wnioski są następujące: (i) rodziny językowe mogą być zróżnicowane na podstawie modeli powinowactwa i pokrewieństwa, dlatego też te modele mogą być uważane za silne wskaźniki genetycznej przynależności, oraz (ii) modele dla cechy „siostrzeńcy i siostrzenice (= dzieci rodzeństwa)”, „rodzeństwo” i „rodzeństwo przyrodnie” - czyli wszystkie cechy, w tym rodzeństwa - są najlepszymi przesłankami genetycznej przynależności, ponieważ są znacznie częściej używane w profilach niż jakakolwiek inna funkcja.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Data Stream Classification Using Classifier Ensemble
Autorzy:
Woźniak, Michał
Kasprzak, Andrzej
Tematy:
data stream classification
classifier enslemble
pattern classification
forgetting
Pokaż więcej
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Powiązania:
https://bibliotekanauki.pl/articles/1373631.pdf  Link otwiera się w nowym oknie
Opis:
For the contemporary business, the crucial factor is making smart decisions on the basis of the knowledge hidden in stored data. Unfortunately,m traditional simple methods of data analysis are not sufficient for efficient management of modern enterprizes, because they are not appropriate for the huge and growing amount of the data stored by them. Additionally data usually comes continuously in the form of so-called data stream. The great disadvantage of traditional classification methods is that they assume that statistical properties of the discovered concept are being unchanged, while in real situation, we could observe so-called concept drift, which could be caused by changes in the probabilities of classes or/and conditional probability distributions of classes. The potential for considering new training data is an important feature of machine learning methods used in security applications (spam filtering or intrusion detection) or decision support systems for marketing departments, which need to follow the changing client behavior. Unfortunately, the occurrence of concept drift dramatically decreases classification accuracy. This work presents the comprehensive study on the ensemble classifier approach applied to the problem of drifted data streams. Especially it reports the research on modifications of previously developed Weighted Aging Classifier Ensemble (WAE) algorithm, which is able to construct a valuable classifier ensemble for classification of incremental drifted stream data. We generalize WAE method and propose the general framework for this approach. Such framework can prune an classifier ensemble before or after assigning weights to individual classifiers. Additionally, we propose new classifier pruning criteria, weight calculation methods, and aging operators. We also propose rejuvenating operator, which is able to soften the aging effect, which could be useful, especially in the case if quite ”old” classifiers are high quality models, i.e., their presence increases ensemble accuracy, what could be found, e.g., in the case of recurring concept drift. The chosen characteristics of the proposed frameworks were evaluated on the basis of the wide range of computer experiments carried out on the two benchmark data streams. Obtained results confirmed the usability of proposed method to the data stream classification with the presence of incremental concept drift.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CHARAKTERYSTYKA SEMANTYCZNA I STRUKTURALNA FRAZEOLOGIZMÓW NOMINUJĄCYCH KONCEPTY MIŁOŚCI, EROTYKI I SEKSU WE WSPÓŁCZESNYM ROSYJSKIM ŻARGONIE MŁODZIEŻOWYM
The Semantic and Structural Description of Phraseologisms Nominating Concepts of Love, Eroticism and Sex in the Contemporary Russian Youth Jargon
Autorzy:
Nawacka, Joanna
Tematy:
semantic classification
lexical-grammatical classification
structural-semantic classification
fixed phraseological units (idioms)
set phrases
Pokaż więcej
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Powiązania:
https://bibliotekanauki.pl/articles/445104.pdf  Link otwiera się w nowym oknie
Opis:
This article presents the description of phraseologisms nominating concepts of love, eroticism and sex in the contemporary Russian youth jargon. The analysis is based on 685 dictionary entries chosen from the contemporary jargon dictionaries.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Association rules in medical data classification
Autorzy:
Kasperczuk, Anna
Jasińska, Aleksandra
Zdrodowska, Małgorzata
Dardzińska-Głębocka, Agnieszka
Tematy:
association rules
classification
classification based on association (CBA)
Pokaż więcej
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Powiązania:
https://bibliotekanauki.pl/chapters/2204723.pdf  Link otwiera się w nowym oknie
Opis:
This chapter is focused on the application of association rules to classify medical data. There is no data mining technique that can produce consistent results for all types of medical data. The effectiveness of a data mining technique depends, among other things, on the type of data collected for study. The purpose of the following work is to see if combining two data mining methods will give better results than using them individually. For this purpose, data on breast cancer in women was used. The results showed that using a hybrid combination of association rules to produce a classifier can improve classification performance.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
MATHEMATICS AND PHYSICAL MOTOR EXPRESSION: A STUDY OF PRE-SCHOOL CHILDREN AT THE LEVEL OF TASKS TIME EXECUTION
Autorzy:
Serrano, João
Afonso, Paulo
Alves, Alice
Mesquita, Helena
Honório, Samuel
Tematy:
Mathematics, Motor Expression, simple classification, multiple classification, Preschool Education
Pokaż więcej
Wydawca:
Politechnika Opolska. Wydział Wychowania Fizycznego i Fizjoterapii
Powiązania:
https://bibliotekanauki.pl/articles/449152.pdf  Link otwiera się w nowym oknie
Opis:
This investigation intends to examine whether there is a correlation between the speed of execution of mathematical tasks successfully resolved and the execution speed of the physical motor control tasks. The specific objectives defined are: knowing if there is a correlation between the times obtained in the activity of Mathematics and times in the activity of Motor Expression; Verify if there is a correlation between the times obtained in the activity of Mathematics and times in the group activity; Verify if there is a correlation between the times obtained in Motor Expression activity and the times obtained in the group activity. The methodology adopted for the realization of this study falls mainly on a positive paradigm, assuming a correlational nature typology. The study was conducted with a group of 22 children. These children performed three timed activities, individually, one for each domain and for the group task. The data analysis was conducted using the statistical program SPSS (version 20). After analysis and processing of data we have obtained positive correlation for all tests, however with very different correlation coefficients. We had a correlation coefficient of r = 0.051 between the activity of Mathematics and the activity of Motor Expression, revealing a tiny positive correlation. The test between the activity of Mathematics and Group Activity originated the correlation index r = 0.749; revealing a moderate positive correlation. In the test between the activity of Motor Expression and Grupo Activity, we had a correlation coefficient r = 0.191, which indicates a weak positive correlation. It was still observable that these data change when we focus only on the results of children aged 5 years old. In the first a correlation index r =0.315 was obtained, changing from tiny to weak positive; the second got an index r = 0.843, changing from moderate to strong positive; the third got an index r = 0.678, and therefore the positive correlation moderate.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
O FRAZEOLOGIZMACH WE WSPÓŁCZESNYM ROSYJSKIM ŻARGONIE NARKOMANÓW
About Phraseologisms in the Contemporary Jargon of Russian Drug Addicts
Autorzy:
Piotrowska-Mazurowska, Monika
Tematy:
phraseologism
jargon
semantic classification
synonymous variants
lexical-grammatical classification
Pokaż więcej
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Powiązania:
https://bibliotekanauki.pl/articles/445094.pdf  Link otwiera się w nowym oknie
Opis:
This article focuses on the issue of drug nominations above the word level. It assumed that every jargon expression composed of two or more elements is a phraseologism. The analysis encompasses 274 phraseological expressions excerpted from the most recent lexicogra- phic sources. Among the analyzed drug nominations there were observed all kinds of expressions divided according to semantic as well as formal criteria. Moreover, phraseological phonetic, mor- phological-grammatical, word-formation and lexical variants were distinguished.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Automatic vehicle classification in systems with single inductive loop detector
Autorzy:
Gajda, J.
Mielczarek, M.
Tematy:
inductive loop detectors
magnetic signature
vehicle classification
classification algorithms
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/221584.pdf  Link otwiera się w nowym oknie
Opis:
The work proposes a new method for vehicle classification, which allows treating vehicles uniformly at the stage of defining the vehicle classes, as well as during the classification itself and the assessment of its correctness. The sole source of information about a vehicle is its magnetic signature normalised with respect to the amplitude and duration. The proposed method allows defining a large number (even several thousand) of classes comprising vehicles whose magnetic signatures are similar according to the assumed criterion with precisely determined degree of similarity. The decision about the degree of similarity and, consequently, about the number of classes, is taken by a user depending on the classification purpose. An additional advantage of the proposed solution is the automated defining of vehicle classes for the given degree of similarity between signatures determined by a user. Thus the human factor, which plays a significant role in currently used methods, has been removed from the classification process at the stage of defining vehicle classes. The efficiency of the proposed approach to the vehicle classification problem was demonstrated on the basis of a large set of experimental data.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vessel classification method based on vessel behavior in the port of Rotterdam
Autorzy:
Zhou, Y.
Daamen, W.
Vellinga, T.
Hoogendoorn, S.
Tematy:
AIS
data analysis
vessel classification
vessel behavior
port
classification method
Pokaż więcej
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Powiązania:
https://bibliotekanauki.pl/articles/135299.pdf  Link otwiera się w nowym oknie
Opis:
AIS (Automatic Identification System) data have proven to be a valuable source to investigate vessel behavior. The analysis of AIS data provides a possibility to recognize vessel behavior patterns in a waterway area. Furthermore, AIS data can be used to classify vessel behavior into several categories. The analysis results would help the port authority and other equivalent parties in port design and optimization or marine traffic management. For researchers, it provides a systematic way to understand, simulate and predict vessel behavior. This paper focuses on vessel classification in the Botlek area, Rotterdam from the perspective of vessel behavior. In this paper, the vessel properties, including vessel type, GT (Gross Tonnage), length and beam, have been analyzed to investigate the vessel behavior, which is described by four factors including heading, COG (Course over Ground), SOG (Speed over Ground), and position. In order to discover the behavior patterns in normal situations, several thresholds are set in order to filter the collected AIS data to define such situations. By plotting the AIS data, behavioral changes with the changes of properties have been observed. Hence, the correlations between vessel behavior and different vessel properties are investigated. The results reveal that a vessel’s sailing position and COG are both strongly determined by beam, while SOG is affected by GT. For the heading of a vessel, no obvious correlation with any vessel property is found. Each behavioral factor is clustered according to the correlated vessel property. This way, the criteria to classify the vessels are determined. The vessel classification results based on their behavior would likely to lead to more consistency in the analysis, simulation and prediction of the vessel behavior. The reason is that the development of such a simulation model is based on a systematic recognition of the vessel behavior patterns.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Potential and use of the googlenet ann for the purposes of inland water ships classification
Autorzy:
Bobkowska, Katarzyna
Bodus-Olkowska, Izabela
Tematy:
ship classification
image classification
geoinformatics
artificial intelligence
artificial neural network
Pokaż więcej
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Powiązania:
https://bibliotekanauki.pl/articles/1573774.pdf  Link otwiera się w nowym oknie
Opis:
This article presents an analysis of the possibilities of using the pre-degraded GoogLeNet artificial neural network to classify inland vessels. Inland water authorities monitor the intensity of the vessels via CCTV. Such classification seems to be an improvement in their statutory tasks. The automatic classification of the inland vessels from video recording is a one of the main objectives of the Automatic Ship Recognition and Identification (SHREC) project. The image repository for the training purposes consists about 6,000 images of different categories of the vessels. Some images were gathered from internet websites, and some were collected by the project’s video cameras. The GoogLeNet network was trained and tested using 11 variants. These variants assumed modifications of image sets representing (e.g., change in the number of classes, change of class types, initial reconstruction of images, removal of images of insufficient quality). The final result of the classification quality was 83.6%. The newly obtained neural network can be an extension and a component of a comprehensive geoinformatics system for vessel recognition.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inventory Classification with Limitations in the Number of Changeovers and Space for Inventory
Autorzy:
Kuo, Yiyo
Jiang, Hao-Chen
Tematy:
inventory classification
ABC classification
inventory management
fill rate
plastic pallet
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:
https://bibliotekanauki.pl/articles/27324202.pdf  Link otwiera się w nowym oknie
Opis:
This research addresses an inventory classification problem in a company that manufactures plastic pallets. Classification of the inventory is difficult because it is subject to two restrictions: the number of changeovers and the size of inventory storage. A mathematical model is first proposed to maximize the fill rate by classifying all product items into four groups. Due to all items can be classified based on the monthly demand, in descending order. The present study then proposed a procedure to find the classification that is most efficient. According to the experimental results, the maximum fill rate in the current situation is 89.85%. The proposed methodology also tested different production batches and levels of demand. The proposed methodology was found to be appropriate for practical application.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The voice on the classification of science
Autorzy:
Michałek, Rudolf
Tematy:
science
classification
degree
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/703316.pdf  Link otwiera się w nowym oknie
Opis:
The article presents the idea of the classification of science which may be useful at conferring the scientific titles and degrees. The proposed change consists in omitting of domains in the classification of science.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Document controversy classification based on the wikipedia category structure
Autorzy:
Jankowski-Lorek, M.
Zieliński, K.
Tematy:
Wikipedia
controversy
classification
Pokaż więcej
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Powiązania:
https://bibliotekanauki.pl/articles/305229.pdf  Link otwiera się w nowym oknie
Opis:
Dispute and controversy are parts of our culture and cannot be omitted on the Internet (where it becomes more anonymous). There have been many studies on controversy, especially on social networks such as Wikipedia. This free on-line encyclopedia has become a very popular data source among many researchers studying behavior or natural language processing. This paper presents using the category structure of Wikipedia to determine the controversy of a single article. This is the first part of the proposed system for classification of topic controversy score for any given text.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Categorization of persons based on their mentions in Polish news texts
Autorzy:
Pachocki, Maciej
Wróblewska, Anna
Tematy:
fined‐grained named entity classification
text classification
categorization of persons
Pokaż więcej
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Powiązania:
https://bibliotekanauki.pl/articles/385228.pdf  Link otwiera się w nowym oknie
Opis:
Our goal described in this paper was to design, imple‐ ment and test a method of categorization of mentions of persons in Polish news texts. We gathered and classified the input data in order to measure the accuracy of the method. Train and test data were constructed by using lists of persons collected from YAGO knowledge base and Polish Wikipedia. During tests the efficiency of categori‐ zation depending on different representations of a per‐ son was studied. Experiments were executed on our and a chosen solution from literature. The results are shown and discussed in the paper.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of optimization of ALS point cloud on classification
Autorzy:
Błaszczak-Bąk, W.
Sobieraj, A.
Tematy:
optimization
classification
intensity
Pokaż więcej
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Powiązania:
https://bibliotekanauki.pl/articles/298363.pdf  Link otwiera się w nowym oknie
Opis:
Airborne laser scanning (ALS) is one of the LIDAR technologies (Light Detection and Ranging). It provides information about the terrain in form of a point cloud. During measurement is acquired: spatial data (object’s coordinates X, Y, Z) and collateral data such as intensity of reflected signal. The obtained point cloud is typically applied for generating a digital terrain model (DTM) and a digital surface model (DSM). For DTM and DSM generation it is necessary to apply filtration or classification algorithms. They allow to divide a point cloud into object groups (e.g.: terrain points, vegetation, etc.). In this study classification is conducted with one extra parameter–intensity. The obtained point groups were used for digital spatial model generation. Classification is a time and work consuming process, therefore there is a need to reduce the time of ALS point cloud processing. Optimization algorithm enables to decrease the number of points in a dataset. In this study the main goal was to test the impact of optimization on the results of a classification. Studies were conducted in two variants. Variant 1 includes classification of the original point cloud where points are divided in the groups: roofs, asphalt road, tree/bushes, grass. On variant 2 before classification, an optimization algorithm was performed in the original point cloud. Obtained from these two variants object groups were used to generate a spatial model, which was then statistically analyzed.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Frequency of various craniofacial clefts observed in a single center during a period of 34 years
Autorzy:
Fijałkowska, Marta
Antoszewski, Bogusław
Tematy:
classification
cleft
types
Pokaż więcej
Wydawca:
Index Copernicus International
Powiązania:
https://bibliotekanauki.pl/articles/1391851.pdf  Link otwiera się w nowym oknie
Opis:
Background: Orofacial clefts are the most common congenital anomalies of the head and neck. Aim: The aim of this paper is to present own group of patients with different types of isolated orofacial clefts. Material and method: A retrospective study presenting patients with different facial clefts was carried out in the group of 473 patients born in the city of Lodz. Results: In the whole group there were: 434 patients with cleft lip and/or palate, 28 with nose clefts and 11 with rare facial clefts classified according to Tessier categorization. Conclusion: In our group, the majority of cases comprised of typical cleft lip and/or palate. Nose clefts are not always a part of craniofacial clefts, but isolated nose clefts can occur and can be observed as midline defects or ala nasi anomaly. A simple system may be adequate for surgical repair, with the more detailed classification schemes important for further understanding of the disease.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Practical aspects of immunocytochemistry in canine lymphomas
Autorzy:
Sapierzynski, R.
Tematy:
immunocytochemistry
canine lymphoma
lymphoma
dog
cytology
immunophenotype
tumour cell
biopsy
diagnosis
Kiel classification
Lennert classification zob.Kiel classification
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/32144.pdf  Link otwiera się w nowym oknie
Opis:
The aim of this study was to evaluate the utility of immunocytochemistry in a standard veterinary practice and to determine the immunophenotype of tumor cells in cases of multicentric lymphoma in dogs by immunocytochemical analysis of fine-needle biopsy specimens. The study was performed on cytological samples collected from 54 dogs, in which multicentric lymphoma was recognised based on clinical data, cytology or cytology and histology, and follow-up information. Diagnosis of lymphoma was established according to the updated Kiel classification. Immunocytochemical assays were conducted using commercially available antibodies to the pan T-lymphocyte marker CD3 and B cell antigen receptor complex CD79 alpha. Among all animals examined B cell lymphoma was recognized in 42/54 (77.8%) of cases, while in the remaining 12/54 (22.2%) of dogs T cell lymphoma was recognized. In 11 animals with lymphoma recognized cytologically, in which an entire lymph node was obtained for histology, the results of routine cytology and immunocytochemistry fully corresponded with findings revealed by histology and immunohistochemistry. Immunocytochemistry can be successfully conducted in smears stored at room temperature for 24 hours without changes of staining results. It can be stated that application of standard cytopathological assessment in connection with immunocytochemistry of lymph nodes samples collected from dogs with lymphoma is a method of choice for establishing final diagnosis, and avoids the need for reexamination or collection of tissue samples for histopathology and immunohistochemistry during surgical procedures in ambiguous cases.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ korekcji atmosferycznej zdjęć satelitarnych na wyniki cyfrowej klasyfikacji wielospektralnej
The influence of atmosferic correction of satelity images on results
Autorzy:
Osińska-Skotak, K.
Tematy:
korekcja atmosferyczna
klasyfikacja wielospektralna
zdjęcia wielospektralne
atmospheric correction
supervised classification
multispectral classification
Pokaż więcej
Wydawca:
Uniwersytet Przyrodniczy we Wrocławiu
Powiązania:
https://bibliotekanauki.pl/articles/341395.pdf  Link otwiera się w nowym oknie
Opis:
Na promieniowanie dochodzące do sensora satelitarnego wpływa przede wszystkim atmosfera, znajdująca się na drodze od obiektu do detektora. Korekcja atmosferyczna jest jednak na ogół pomijana w procesie przetwarzania zdjęć satelitarnych. Wynika to m.in. z faktu, iż aby wpływ atmosfery oszacować w sposób poprawny, wymagana jest duża liczba danych pomiarowych i skomplikowany model atmosfery. W przypadku analizy zdjęć archiwalnych uzyskanie tego rodzaju danych często jest utrudnione, a czasami wręcz niemożliwe. Stosuje się więc na ogół tzw. średnie atmosfery klimatyczne, które charakteryzują średnie warunki atmosferyczne panujące na danym terenie. Wymóg wykonywania korekcji atmosferycznej zdjęć satelitarnych nie zawsze występuje (np. analizy jakościowe, interpretacja wizualna), ale w przypadku przeprowadzania analiz ilościowych lub wieloczasowych uwzględnienie wpływu atmosfery jest czynnikiem istotnym dla uzyskania prawidłowych wyników. Niniejsze opracowanie prezentuje wyniki badań nad wpływem uwzględnienia korekcji atmosferycznej w procesie klasyfikacji wielospektralnej. Okazuje się, że klasyfikacja obrazów skorygowanych ze względu na wpływ atmosfery pozwala na uzyskanie lepszej delimitacji klas, niż to jest w przypadku klasyfikacji zdjęć źródłowych.
Atmosphere between an object and a satellite detector is the most important element, which decided about the radiation registered by satellite sensor. However, atmospheric correction is mostly neglected during satellite image processing. It's implicated by fact that to estimate the influence of atmospheric conditions, a lot of different meteorological parameters and model of atmosphere are needed. In case of archived images gathering this kind of data is often difficult or even impossible. Therefore standard atmosphere models which described average atmospheric conditions on different areas are used. In some application atmospheric correction is not needed (i.e. qualitative analyses, visual interpretation) but for quantitative analyses or multitemporal analyses this correction is very important to obtain correct results. This article presents results of researches on influence of atmospheric correction on the process of multispectral classification. It was found that classification of atmospheric corrected images make better classes delimitation possible.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antyscam : Practical Web Spam Classifier
Autorzy:
Luckner, Marcin
Gad, Michał
Sobkowiak, Paweł
Tematy:
web spam detection
spam detection
imbalanced sets classification
automatic classification
machine learning
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/226008.pdf  Link otwiera się w nowym oknie
Opis:
To avoid of manipulating search engines results by web spam, anti spam system use machine learning techniques to detect spam. However, if the learning set for the system is out of date the quality of classification falls rapidly. We present the web spam recognition system that periodically refreshes the learning set to create an adequate classifier. A new classifier is trained exclusively on data collected during the last period. We have proved that such strategy is better than an incrementation of the learning set. The system solves the starting–up issues of lacks in learning set by minimisation of learning examples and utilization of external data sets. The system was tested on real data from the spam traps and common known web services: Quora, Reddit, and Stack Overflow. The test performed among ten months shows stability of the system and improvement of the results up to 60 percent at the end of the examined period.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Enhancement of COVID-19 symptom-based screening with quality-based classifier optimisation
Autorzy:
Kozielski, Michał
Henzel, Joanna
Tobiasz, Joanna
Gruca, Aleksandra
Foszner, Paweł
Zyla, Joanna
Bach, Małgorzata
Werner, Aleksandra
Jaroszewicz, Jerzy
Polańska, Joanna
Sikora, Marek
Tematy:
classification
classification quality
screening
COVID-19
klasyfikacja
jakość klasyfikacji
badania przesiewowe
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/2086854.pdf  Link otwiera się w nowym oknie
Opis:
Efforts of the scientific community led to the development of multiple screening approaches for COVID-19 that rely on machine learning methods. However, there is a lack of works showing how to tune the classification models used for such a task and what the tuning effect is in terms of various classification quality measures. Understanding the impact of classifier tuning on the results obtained will allow the users to apply the provided tools consciously. Therefore, using a given screening test they will be able to choose the threshold value characterising the classifier that gives, for example, an acceptable balance between sensitivity and specificity. The presented work introduces the optimisation approach and the resulting classifiers obtained for various quality threshold assumptions. As a result of the research, an online service was created that makes the obtained models available and enables the verification of various solutions for different threshold values on new data.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modified, threshold-based circulation type classification for Central Europe, on the basis of Lityńskis classification
Autorzy:
Kulesza, Kinga
Tematy:
Atmospheric circulation
circulation type classification
threshold-based classification
Litynski
Central Europe
Pokaż więcej
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Powiązania:
https://bibliotekanauki.pl/articles/2137038.pdf  Link otwiera się w nowym oknie
Opis:
There are many classifications of atmospheric circulation types. In Poland, the most important one, used by Polish weather services, is the classification of circulation types developed by Lityński. This paper proposes four modifications to the currently used algorithm for determining atmospheric circulation types. The proposed algorithms have been compared and it has been shown which one produces a catalogue of circulation types in which the division of the distribution of the values of the three indices (the zonal index Ws, meridional index Wp and cyclonicity index Cp) into three classes is the closest to being equally likely. In 19862015, the classification scheme that deemed to be the best, difered in above 19% of cases from the currently used classification.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A novel classifier combining supervised and unsupervised learning methods
Autorzy:
Chmielnicki, Wiesław
Wydawca:
The Institute of Electrical and Electronics Engineers
Opis:
Nearest Centroid Neighbor (NCN) classifier is a fast and simple algorithm representing supervised methods of data classification. This algorithm assumes that all classes can be represented by the individual clusters and the classes means (centroids) are used to determine to which class a new unknown sample belongs. However the assumption that each class consists of one and exactly one cluster limits the performance of the algorithm. A method of replacing this one cluster by two or more subclusters is proposed in this paper. The new algorithm uses a well-known unsupervised classification method k-means clustering to find the centroids of these subclusters. This modification of NCN classifier improves the results achieved on several databases.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Inne
Tytuł:
Zapalniki. Definicje i podział
Fuses. Definitions and classification
Autorzy:
Bazela, R.
Cykier, L.
Tematy:
zapalnik
klasyfikacje
fuse
classification
Pokaż więcej
Wydawca:
Wojskowy Instytut Techniczny Uzbrojenia
Powiązania:
https://bibliotekanauki.pl/articles/236162.pdf  Link otwiera się w nowym oknie
Opis:
W artykule przedstawiono definicje, klasyfikację oraz przykłady zapalników w poszczególnych grupach klasyfikacyjnych. Omówione też zostały główne wymagania stawiane przed zapalnikami w poszczególnych grupach, a także sposoby ich realizacji wraz z rozwojem techniki wojennej. Jest on próbą zebrania podstawowych informacji o klasyfikacji zapalników w jedną całość. .
In the paper the definitions and the proposals of classification of fuses were presented. The main requirements for particular categories of fuses were also discussed.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przestrzenne zróżnicowanie obrotu nieruchomościami gruntowymi przeznaczonymi pod zabudowę mieszkaniową w ujęciu województw
The spatial diversification of turnoverof land properties intended for dwelling-houses building in the context of voivodeships
Autorzy:
Oleńczuk-Paszel, Anna
Sompolska-Rzechuła, Agnieszka
Tematy:
turnover
land properties
classification
Pokaż więcej
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Powiązania:
https://bibliotekanauki.pl/articles/424902.pdf  Link otwiera się w nowym oknie
Opis:
In the article a quantitative and valuable structure of transactions of land properties has been analyzed, especially taking into consideration lands intended for a dwelling-houses building, in Poland, in the years 2009-2011. Using one of the multivariate analysis methods the analysis and the evaluation of the spatial diversification of the voivodeships with regard to the analyzed properties turnover were done. Statistical data came from the Central Statistical Office publication titled ”Properties turnover”. After the reduction of the initial set of diagnostic features with parametric method, the final set, which was a basis for the voivodeships’ classification, was obtained. Finally five classes of voivodeships similar with respect to the turnover of lands intended for a dwelling-houses building were obtained.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uwagi o zmienności suewitów
Remarks on the variability of suevites
Autorzy:
Kosina, Romuald
Tematy:
classification
components
suevites
variability
Pokaż więcej
Wydawca:
Polskie Towarzystwo Meteorytowe
Powiązania:
https://bibliotekanauki.pl/articles/1033086.pdf  Link otwiera się w nowym oknie
Opis:
Suevite is the impact breccia rock with glass particles that attracts the attention of researches because of its broad variability. Many characteristics of the environment and impact process determine this attention, and, in consequence, various descriptions and names of the rock are presented in the literature. The Rochechouart impact structure is a good example of suevite or suevite-like rock diversity in its several localities (Rochechouart, Chassenon, LaValette, Montoume). The relationships between suevite components and target rocks can be exemplified by Kara and Popigai and other astroblemes. To simplify the classification of the rock, its main and more stable components (matrix, glass, clasts) should be considered. More detailed analysis of the suevite components can be used for sub-classifications, similarly as it is done for other Earth rocks. In addition, a short description of suevites from various astroblemes is presented. The possibility of the monomict suevite breccia creation is discussed.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biomechanical Performance Factors for Development of Minimum Disability Requirements in Para-taekwondo – Part 1
Autorzy:
O’Sullivan, David
Fife, Gabriel P.
Tematy:
classification
kinematics
para-taekwondo
Pokaż więcej
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Powiązania:
https://bibliotekanauki.pl/articles/1054726.pdf  Link otwiera się w nowym oknie
Opis:
Objective: To assess taekwondo sparring performance variables, such as joint ranges of motion, reaction times, and kicking foot speeds, to serve as a framework for developing sport-specific classification in Para-taekwondo competition. Methods: After a standard taekwondo warm up, athletes executed five popular scoring techniques, back kick, cut kick, fast kick, turning kick, and tornado kick five times each (25 total). Kinematic and kinetic variables were recorded by a motion capture system of seven infrared cameras and two force plates. Maximum joint range of motion, foot velocities, and reaction time were calculated. Results: Collapsed over kick, maximum hip abduction motion, maximum hip flexion, maximum knee flexion, peak foot velocity, reaction time for male athletes were 47.8 ±10.4°, 46.3 ±7.6°, 105.3 ±14.0°, 11.5 ±2.4 m/s, and 0.46 ±0.06 s respectively. maximum hip abduction motion, maximum hip flexion, maximum knee flexion, peak foot velocity, reaction time for female athletes were 49.1 ±6.8°, 43.9 ±11.0°, 94.2 ±13.7°, 10.9 ±2.2 m/s, and 0.48 ±0.11 s respectively. Conclusions: The results of this study provide a foundational framework for future studies designed to compare and assess Para-taekwondo athletes with various physical and neurological impairments. From this, future studies may move towards developing practical on-site sport specific testing methods which may ultimately assist in making taekwondo-specific classification for Para-taekwondo competitions.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Special normal form of a hyperbolic CR-manifold in ℂ⁴
Autorzy:
Ežov, Vladimir
Schmalz, Gerd
Tematy:
CR-manifolds
invariants
classification
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Powiązania:
https://bibliotekanauki.pl/articles/1294219.pdf  Link otwiera się w nowym oknie
Opis:
We give a special normal form for a non-semiquadratic hyperbolic CR-manifold M of codimension 2 in ℂ⁴, i.e., a construction of coordinates where the equation of M satisfies certain conditions. The coordinates are determined up to a linear coordinate change.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Distinction of lakes and rivers on satellite images using mathematical morphology
Rozróżnienie rzek i jezior na zdjęciach satelitarnych, przy użyciu morfologii matematycznej
Autorzy:
Kupidura, P.
Tematy:
mathematical morphology
remote sensing
classification
contextual classification
morfologia matematyczna
teledetekcja
klasyfikacja
klasyfikacja kontekstualna
Pokaż więcej
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Powiązania:
https://bibliotekanauki.pl/articles/209269.pdf  Link otwiera się w nowym oknie
Opis:
This paper concerns the application of mathematical morphology for object-oriented classification of satellite images. The example of distinguishing different bodies of water using the author-made algorithm will be presented. Different types of water bodies like lakes and rivers are easy to differentiate when visually interpreted. However, it is much more difficult to differentiate using a traditional, pixel-based classification process. Mathematical morphology operations, which take into account such import ant features of objects like shape and size, allow these two types of water bodies to be distinguished in object classification. The proposed algorithm allows one practically error-free classification. The results show, that mathematical morphology is a potent tool for object-oriented classification.
Artykuł dotyczy zastosowania morfologii matematycznej do obiektowej klasyfikacji treści zdjęć satelitarnych. Działanie wybranych operacji morfologicznych przedstawione jest na przykładzie autorskiego algorytmu, którego celem jest rozróżnienie różnych typów zbiorników wód powierzchniowych, takich jak jeziora i rzeki. Ponieważ takie rozróżnienie wymaga wzięcia pod uwagę takich cech obiektów, jak rozmiar, długość, czy szerokość, kształt, tradycyjna klasyfikacja pikselowa, oparta na wartościach pikseli, jest nieskuteczna. Operacje morfologii matematycznej, ze swojej natury kontekstualne, pozwalają uwzględnić wspomniane wcześniej cechy, co z kolei umożliwia odróżnienie obiektów na podstawie ich kształtu. Klasyfikacja dokonana przy użyciu autorskiego algorytmu na zdjęciach satelitarnych przedstawiających różnego rodzaju obszary testowe, została porównana z wynikami fotointerpretacji zdjęcia, uznanej za bezbłędną. Porównanie wskazuje na dużą skuteczność prezentowanego algorytmu, a jednocześnie, na duży potencjał operacji morfologicznych w zakresie obiektowej klasyfikacji zdjęć lotniczych i satelitarnych.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of n-stage latent Dirichlet allocation on analysis of headline classification
Autorzy:
Guven, Zekeriya Anil
Diri, Banu
Cakaloglu, Tolgahan
Tematy:
topic modeling
headline classification
machine learning
text classification
latent Dirichlet allocation
data analysis
Pokaż więcej
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Powiązania:
https://bibliotekanauki.pl/articles/27312901.pdf  Link otwiera się w nowym oknie
Opis:
Data analysis becomes difficult when the amount of the data increases. More specifically, extracting meaningful insights from this vast amount of data and grouping it based on its shared features without human intervention requires advanced methodologies. There are topic-modeling methods that help overcome this problem in text analyses for downstream tasks (such as sentiment analysis, spam detection, and news classification). In this research, we benchmark several classifiers (namely, random forest, AdaBoost, naive Bayes, and logistic regression) using the classical latent Dirichlet allocation (LDA) and n-stage LDA topic-modeling methods for feature extraction in headline classification. We ran our experiments on three and five classes of publicly available Turkish and English datasets. We have demonstrated that, as a feature extractor, n-stage LDA obtains state-of-the-art performance for any downstream classifier. It should also be noted that random forest was the most successful algorithm for both datasets.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Archeologia Polski. Vol. 22 (1977) No 1
Archeologia Polski. T. 22 (1977) Z. 1, Recenzje
Archeologia Polski. T. 22 (1977) Z. 1
Archeologia Polski. Vol. 22 (1977) No 1, Reviews
Autorzy:
Buko, Andrzej (1947– ). Rec.
Buko, Andrzej (1947– ). Reviewer
Współwytwórcy:
Polska Akademia Nauk. Instytut Historii Kultury Materialnej
Wydawca:
Zakład Narodowy im. Ossolińskich
Powiązania:
Archeologia Polski
Opis:
J. E. Ericson, E. G. Stickel, A proposed classification system for ceramics, "World Archaeology", vol. 4: 1973, No 3, p. 357-367
S. 213-215 ; 25 cm
P. 213-215 ; 25 cm
J. E. Ericson, E. G. Stickel, A proposed classification system for ceramics, "World Archaeology", t. 4: 1973, nr 3, s. 357-367
Dostawca treści:
RCIN - Repozytorium Cyfrowe Instytutów Naukowych
Książka
Tytuł:
Data mining approach in diagnosis and treatment of chronic kidney disease
Autorzy:
Turiac, Andreea S.
Zdrodowska, Małgorzata
Tematy:
feature selection
classification
classification rules
action rules
data mining
chronic kidney disease
Pokaż więcej
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Powiązania:
https://bibliotekanauki.pl/articles/2105985.pdf  Link otwiera się w nowym oknie
Opis:
Chronic kidney disease is a general definition of kidney dysfunction that lasts more than 3 months. When chronic kidney disease is advanced, the kidneys are no longer able to cleanse the blood of toxins and harmful waste products and can no longer support the proper function of other organs. The disease can begin suddenly or develop latently over a long period of time without the presence of characteristic symptoms. The most common causes are other chronic diseases – diabetes and hypertension. Therefore, it is very important to diagnose the disease in early stages and opt for a suitable treatment - medication, diet and exercises to reduce its side effects. The purpose of this paper is to analyse and select those patient characteristics that may influence the prevalence of chronic kidney disease, as well as to extract classification rules and action rules that can be useful to medical professionals to efficiently and accurately diagnose patients with kidney chronic disease. The first step of the study was feature selection and evaluation of its effect on classification results. The study was repeated for four models – containing all available patient data, containing features identified by doctors as major factors in chronic kidney disease, and models containing features selected using Correlation Based Feature Selection and Chi-Square Test. Sequential Minimal Optimization and Multilayer Perceptron had the best performance for all four cases, with an average accuracy of 98.31% for SMO and 98.06% for Multilayer Perceptron, results that were confirmed by taking into consideration the F1-Score, for both algorithms was above 0.98. For all these models the classification rules are extracted. The final step was action rule extraction. The paper shows that appropriate data analysis allows for building models that can support doctors in diagnosing a disease and support their deci-sions on treatment. Action rules can be important guidelines for the doctors. They can reassure the doctor in his diagnosis or indicate new, previously unseen ways to cure the patient.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ensemble Classification : Example and Python Implementation
Autorzy:
Andziak, Piotr
Figielska, Ewa
Tematy:
ensemble classification
clustering
python
Pokaż więcej
Wydawca:
Warszawska Wyższa Szkoła Informatyki
Powiązania:
https://bibliotekanauki.pl/articles/91525.pdf  Link otwiera się w nowym oknie
Opis:
The paper presents an ensemble classification method based on clustering, along with its implementation in the Python programming language. An illustrative example showing the method behavior is provided, and the results of a computational experiment performed on real life data sets are reported.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Compound invariants and embeddings of Cartesian products
Autorzy:
Chalov, P. A.
Djakov, P. B.
Zahariuta, V. P.
Tematy:
isomorphic classification
Köthe spaces
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Powiązania:
https://bibliotekanauki.pl/articles/1216224.pdf  Link otwiera się w nowym oknie
Opis:
New compound geometric invariants are constructed in order to characterize complemented embeddings of Cartesian products of power series spaces. Bessaga's conjecture is proved for the same class of spaces.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On Dragilev type power Köthe spaces
Autorzy:
B. Djakov, P.
Zahariuta, V.
Tematy:
isomorphic classification
Köthe spaces
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Powiązania:
https://bibliotekanauki.pl/articles/1287314.pdf  Link otwiera się w nowym oknie
Opis:
A complete isomorphic classification is obtained for Köthe spaces $X = K(exp[χ(p - κ (i)) - 1/p]a_i)$ such that $X qd_≃ X^2$; here χ is the characteristic function of the interval [0,∞), the function κ: ℕ → ℕ repeats its values infinitely many times, and $a_i → ∞$. Any of these spaces has the quasi-equivalence property.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rare facial clefts
Autorzy:
Fijałkowska, Marta
Antoszewski, Bogusław
Tematy:
facial cleft
classification
treatment
Pokaż więcej
Wydawca:
Index Copernicus International
Powiązania:
https://bibliotekanauki.pl/articles/1394357.pdf  Link otwiera się w nowym oknie
Opis:
In 1976 Dr. Paul Tessier described numeric classification for rare craniofacial clefts. He first emphasized that a fissure of the soft tissue corresponds, as a general rule, to a cleft of the bony structure. The classification, easy to understand, became widely accepted because the recording of the malformations was simple and facilitated communication between observers. The aim of this study was to present our own experience with treatment of patients with rare facial clefts. Material and methods. Our Department has 11 patients with rare craniofacial clefts under its care. This group includes 8 boys and 3 girls. The patients aged from 2 months to 18 years at the time of the first consultation. Results. In two patients the cleft was median, in seven patients it was one-sided and in two – bilateral. The most common type of cleft was number 6, and the rarest were 2, 3, and 7. All patients underwent surgical treatment. Conclusions. Atypical facial clefts are rare congenital anomalies, however because of functional and aesthetic disturbances they constitute a serious medical and therapeutic problem. Facial clefts are characterized by variable clinical presentation and require individualized treatment plan.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Literatura w grach wideo. Rozeznanie wstępne
Literature in video games. Initial discernment
Autorzy:
Ołownia, Mikołaj
Tematy:
literature
video games
classification
Pokaż więcej
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Powiązania:
https://bibliotekanauki.pl/articles/55995621.pdf  Link otwiera się w nowym oknie
Opis:
This article is the first attempt to describe the issue of using literary texts in role-playing video games. The author discusses the function of this type of literature, with particular emphasis on its impact on immersion, and presents his own classification of literary texts used in games.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Automatic aircraft recognition using convolutional neural network
Autorzy:
Adamiak, Dominik
Ślesicka, Anna
Tematy:
deep learning
aircraft
classification
Pokaż więcej
Wydawca:
Polskie Forum Nawigacyjne
Powiązania:
https://bibliotekanauki.pl/articles/58443956.pdf  Link otwiera się w nowym oknie
Opis:
The paper presents the possibility of utilisation convolutional neural network for aircraft classification by their type. Main purpose of the study was to use a common deep learning network and modify it to correctly classify three types of general aviation aircraft. Differentiation is made based on their low quality picture with black outline on white background. Database utilized in this study is small compared to common CNN databases and results ought to be taken only as a trend. Research consisted of choosing right parameters of network to make the recognition as accurate as possible. 20 samples have been produced to evaluate accuracy of the software and eliminate deviations. Conclusions and issues have also been described.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A real-valued genetic algorithm to optimize the parameters of support vector machine for classification of multiple faults in NPP
Autorzy:
Amer, F. Z.
El-Garhy, A. M.
Awadalla, M. H.
Rashad, S. M.
Abdien, A. K.
Tematy:
support vector machine (SVM)
fault classification
multi fault classification
genetic algorithm (GA)
machine learning
Pokaż więcej
Wydawca:
Instytut Chemii i Techniki Jądrowej
Powiązania:
https://bibliotekanauki.pl/articles/147652.pdf  Link otwiera się w nowym oknie
Opis:
Two parameters, regularization parameter c, which determines the trade off cost between minimizing the training error and minimizing the complexity of the model and parameter sigma (σ) of the kernel function which defines the non-linear mapping from the input space to some high-dimensional feature space, which constructs a non-linear decision hyper surface in an input space, must be carefully predetermined in establishing an efficient support vector machine (SVM) model. Therefore, the purpose of this study is to develop a genetic-based SVM (GASVM) model that can automatically determine the optimal parameters, c and sigma, of SVM with the highest predictive accuracy and generalization ability simultaneously. The GASVM scheme is applied on observed monitored data of a pressurized water reactor nuclear power plant (PWRNPP) to classify its associated faults. Compared to the standard SVM model, simulation of GASVM indicates its superiority when applied on the dataset with unbalanced classes. GASVM scheme can gain higher classification with accurate and faster learning speed.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ liczby predyktorów na skuteczność algorytmów opartych na drzewach klasyfikacyjnych
The influence of number of predictors on accuracy of classification algorithms based on trees
Autorzy:
Owczarek, T.
Sojda, A.
Kaczmarek, K.
Tematy:
klasyfikacja
dobór zmiennych
drzewa klasyfikacyjne
analityka predykcyjna
classification
feature selection
classification trees
predictive analytics
Pokaż więcej
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Powiązania:
https://bibliotekanauki.pl/articles/324994.pdf  Link otwiera się w nowym oknie
Opis:
Współczesne organizacje, aby być konkurencyjne, muszą mieć umiejętności przetworzenia olbrzymich danych. Jednym z najbardziej obiecujących kierunków w tym zakresie jest wykorzystanie analityki predykcyjnej, opierającej się na algorytmach i modelach uczenia maszynowego. Związanych z tym jest wciąż wiele wyzwań, m.in. pytanie o „wejście” do takich modeli, czy powinny to być wszystkie dane zgromadzone przez organizację czy może raczej wcześniej wybrane zmienne? Celem artykułu jest zbadanie skuteczności algorytmów opartych na drzewach klasyfikacyjnych ze względu na liczebność predyktorów.
To stay competitive contemporary organizations have to master in processing massive amount of data. Predictive analytics, that is analytics based on machine learning algorithms and models, is one of the most promising directions. But there are many issues involved. One of them is the input to such models: should it be all data gathered by organization or just the selected variables? The aim of the article is to check how the number of predictors influences accuracy of classification algorithms based on trees.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
“ANNA KARENINA”- T. STOPPARD VS. L. TOLSTOY
Autorzy:
Gurina, EKATERINA
Tematy:
script
protagonist
scriptwriter
character
classification
Pokaż więcej
Wydawca:
Fundacja Pro Scientia Publica
Powiązania:
https://bibliotekanauki.pl/articles/628522.pdf  Link otwiera się w nowym oknie
Opis:
Aim. The aim of the research is to compare Konstantin Levin’s function in the film Anna Karenina(2012) by Joe Wright, the script written by Tom Stoppard and the novel Anna Kareninaby Leo Tolstoy and to determine how much his figure was changed in the film adaptation under the influence of the scriptwriter’s and director’s stance. Methods. The subjects of the study were the film Anna Karenina (2012) by Joe Wright, the script written by Tom Stoppard and the novel Anna Karenina by Leo Tolstoy. They are analysed with the use of the theory of script writing, different types of character classifications and the text corpus analysis, taking into account the cultural, historical and economic features of scriptwriting and film production. Results. The analysis shows that Konstantin Levin’s function of the second protagonist that is characteristic for the novel is further developed in the screenplay but is omitted in the film. The discrepancies with the source book and the screenplay are caused by the influence of the film director during the film production. Conclusions. Even though the study considers the texts that are closely interrelated, the individual author’s stance influences the text of the screenplay so much that it gives us an opportunity to call Tom Stoppard, the scriptwriter, a writer in the full sense of the word.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetic classification of meteorites and application to the Sołtmany fall
Autorzy:
Rochette, P.
Gattacceca, J.
Lewandowski, M.
Tematy:
magnetic susceptibility
meteorite classification
Sołtmany
Pokaż więcej
Wydawca:
Polskie Towarzystwo Meteorytowe
Powiązania:
https://bibliotekanauki.pl/articles/411478.pdf  Link otwiera się w nowym oknie
Opis:
We review the use of magnetic susceptibility measurements to classify meteorites, showing that magnetic susceptibility of meteorites vary over 3 orders of magnitude and shows often a narrow range for a given meteorite group, especially in chondrites. Weathering of metal may bias the magnetic classification. For ordinary chondrite falls, the method is quite robust, as shown by its application to the recent Sołtmany fall.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Classification of Large Data Sets. Comparison of Performance of Chosen Algorithms
Klasyfikacja dużych zbiorów porównanie wydajności wybranych algorytmów
Autorzy:
Dudek, Andrzej
Tematy:
clustering
classification
large data sets
Pokaż więcej
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Powiązania:
https://bibliotekanauki.pl/articles/905663.pdf  Link otwiera się w nowym oknie
Opis:
Researchers analyzing large (> 100,000 objects) data sets with the methods of cluster analysis often face the problem of computational complexity of algorithms, that sometimes makes it impossible to analyze in an acceptable time. Common solution of this problem is to use less computationally complex algorithms (like k-means), which in turn can in many cases give much worse results than for example algorithms using eigenvalues decomposition . The results of analysis of the actual sets of this type are therefore usually a compromise between quality and computational capabilities of computers. This article is an attempt to present the current state of knowledge on the classification of large datasets, and identify ways to develop and open problems.
Badacze analizujący przy pomocy metod analizy skupień duże (> 100.000 obiektów) zbiory danych, stają często przed problemem złożoności obliczeniowej algorytmów, uniemożliwiającej niekiedy przeprowadzenie analizy w akceptowalnym czasie. Jednym z rozwiązań tego problemu jest stosowanie mniej złożonych obliczeniowo algorytmów (hierarchiczne aglomeracyjne, k-średnich), które z kolei mogą w wielu sytuacjach dawać zdecydowanie gorsze rezultaty niż np. algorytmy wykorzystujące dekompozycję względem wartości własnych. Rezultaty rzeczywistych analiz tego typu zbiorów są więc zazwyczaj kompromisem pomiędzy jakością a możliwościami obliczeniowymi komputerów. Artykuł jest próbą przedstawienia aktualnego stanu wiedzy na temat klasyfikacji dużych zbiorów danych oraz wskazania dróg rozwoju i problemów otwartych.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multidimensional Data Classification - Comparison of Isodata and Approximation by Points Methods
Klasyfikacja wielowymiarowych danych - porównanie metody 1 SOD АТА i metody aproksymacji punktami
Autorzy:
Maciuk, Arkadiusz
Tematy:
classification
division method
multivalent data
Pokaż więcej
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Powiązania:
https://bibliotekanauki.pl/articles/906292.pdf  Link otwiera się w nowym oknie
Opis:
Efekt podziału zależy nie tylko od ustalenia kryteriów podziału, ale także od wyboru metody dzielenia. Standardowy algorytm klasyfikacji wielowymiarowych danych ISODATA dzieli wyjściowy zbiór na ustaloną liczbę rozłącznych podzbiorów tak, aby podział ten jak najkorzystniej spełniał przyjęte kryteria. Alternatywą wobec niego jest algorytm oparty na metodzie aproksymacji ustaloną liczbą punktów, którego efektem jest wskazanie obszarów zbioru o dużym stopniu zagęszczenia elementów. Artykuł zawiera porównanie efektów użycia tych metod ze wskazaniem zalet i wad. Omawia też pewne własności klasyfikacji wynikające z konsekwencji wyboru jednej z dwóch omawianych metod.
The effect of division is dependent not only on the criteria of division but also on the chosen method. The standard algorithm of multidimensional data classification ISODATA divides the given set into an assumed number of separable subsets in such a way that the division fulfills best the accepted criteria. An alternative method is approximation by the chosen number of points which in result indicates the areas of a set with large congestion o f the elements. The paper compares effects of using both methods listing their advantages and drawbacks. Apart from presenting the results of division of various sets some characteristics of classification are discussed which are an effect of the choice of one of the above mentioned methods.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Rough Sets Approach to Multicriteria EU ’s Countries Classification Problem Based on Dominance Relation - the Probabilistic Characteristics of Decision Rules
Zastosowanie zbiorów przybliżonych do wielokryterialnego problemu klasyfikacji państw Unii Europejskiej w oparciu o relację dominacji. Probabilistyczne właściwości generowanych reguł decyzyjnych
Autorzy:
Gruszka, Iwona
Tematy:
rough sets
multicriteria classification problem
Pokaż więcej
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Powiązania:
https://bibliotekanauki.pl/articles/906883.pdf  Link otwiera się w nowym oknie
Opis:
The rough sets theory was introduced by Z. Pawlak (1982). The mathematical base on rough sets approach is a binary relation on universe of objects. In the classic rough sets theory there is an indiscemibility relation. As an equivalence relation it permit to divide the universe of objects on equivalence classes called elementary sets and forms a basic granules of knowledge of the universe. For creating good decision model (with possible small number of robust rules) the granulation process is indispensable. However, from the other point of view, it is natural to extend the indiscemibility concept taking into account the situations where some objects dominate another ones by the considered criteria which domains are preferentially ordered. For this reason S. Greco, B. Materazzo and R. Słowiński (1996a, b, 1999) have proposed an extension of the rough set theory. This innovation is based on substitution of the indiscemibility relation by a dominance relation in the rough approximation of decision classes. The aim of this work is the decision analysis of EU’s countries classification problem for designing the decision model with dominance relation approach using the "4eMka" system. Also the probabilistic characteristics of decision rules are presented.
Teoria zbiorów przybliżonych została wprowadzona przez Z. Pawlaka w 1982. Matematyczną podstwą zstosowania zbiorów przybliżonych jest relacja binarna określona na uniwersum obiektów. W klasycznej analizie zbiorów przybliżonych jest to relacja nierozróżnialności. Jako relacja równoważności pozwala ona dzielić uniwersum obiektów na klasy równoważności, które stanowią atomy wiedzy o uniwersum. W celu wyindukowania dobrego modelu (z możliwie małą liczbą silnych reguł) niezbędny jest proces granulacji. Niemniej jednak z innego punktu widzenia całkiem naturalne wydaje się rozszerzenie koncepcji nierozróżnialności w celu rozważenia sytuacji, gdy jedne obiekty dominują nad innymi ze wyględu na rozważane kryteria, których zbiory wartości są uporządkowne zgodnie z preferencjami decydenta. S. Greco, B. Materazzo i R. Słowiński (1999a, b, 1999) zaproponowali rozszerzenie teorii zbiorów przybliżonych — relacja nierozróżnialności została zastąpiona relacją dominacji. Celem analizy przeprowadzonej przez autorkę jest indukcja modelu decyzyjnego i określenie probabilistycznych właściwości generowanych reguł decyzyjnych dla problemu wielokryterialnej klasyfikacji państw Unii Europejskiej. Analiza została przeprowadzona przez autorkę w systemie „4eMka”.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Using Geobia and Data Fusion Approach for Land use and Land Cover Mapping
Autorzy:
Wężyk, Piotr
Hawryło, Paweł
Szostak, Marta
Pierzchalski, Marcin
De Kok, Roeland
Tematy:
classification
hydrology
OBIA
rapideye
SaLMaR
Pokaż więcej
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Powiązania:
https://bibliotekanauki.pl/articles/1052704.pdf  Link otwiera się w nowym oknie
Opis:
Land Use and Land Cover (LULC) maps play an important role in an environmental modelling, and for many years efforts have been made to improve and streamline the expensive mapping process. The aim of the study was to create LULC maps of three selected water catchment areas in South Poland using a Geographic Object-Based Image Analysis (GEOBIA) in order to highlight the advantages of this innovative, semi-automatic method of image analysis. the classification workflow included: multi-stage and multi-scale analyses based on a data fusion approach. Input data consisted mainly of BlackBridge (RapidEye) high resolution satellite imagery, although for distinguishing particular LULC classes, additional satellite images (LANDSAT TM5) and GIS-vector data were used. Accuracy assessment of GEOBIA classification results varied from 0.83 to 0.87 (kappa), depending on the specific catchment area. The main recognized advantages of GEOBIA in the case study were: performing of multi-stage and multi-scale image classification using different features for specific LULC classes and the ability to using knowledge-based classification in conjunction with the data fusion approach in an efficient and reliable manner.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Emotions and their cognitive and adaptive functions
Autorzy:
Janocha, A.
Shpakou, A.
Sobieszczańska, M
Kałka, D.
Klimatckaia, L.
Woźniak, W.
Pilecka-Radziszewska, K.
Małyszczak, K.
Tematy:
Classification of emotions
adaptation
cognition.
Pokaż więcej
Wydawca:
Uniwersytet Medyczny w Białymstoku
Powiązania:
https://bibliotekanauki.pl/articles/1918593.pdf  Link otwiera się w nowym oknie
Opis:
Emotions appeared very early in phylogenetic and ontogenetic development. The word emotion originates from the Latin verb movere. However, attempts to distinguish and name the concept represented by the phrase emotion reach back to the beginnings of human language. The compound and subjective nature of emotions stress an essential aspect of this phenomenon, which leads to changes in physiological, psychological, and behavioral issues. World literature dedicates significant attention to the mutual associations between the cognitive and adaptive processes and emotions. Emotions help to estimate the adaptational meaning of stimuli. Its cognitive aspect is, however, just as significant. The review of the literature presented herein is an attempt to classify and evaluate particular emotions, both positive and negative, and the influence they have on physical and mental health. Paul Ekman, the author of one of the more esteemed classification attempts, has distinguished six basic emotions: anger, disgust, fear, happiness, sadness, and surprise. These universal emotions are recognized based on emotional facial expressions, the automatic reactions that unfold within microseconds. Robert Plutchik, on the other hand, devised his „emotion wheel” upon which he organized eight basic emotions by grouping them in pairs comprising a combination of positive and negative emotions. He is also the author of one of the best framed emotional combination theories. In this respect, emotions play a crucial role as compound model reactions to everyday situations such as a long-lasting effort ensuring survival and individual development.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Weather and a part of day recognition in the photos using a KNN methodology
Autorzy:
Krzywicki, T.
Tematy:
image analysis
machine learning
classification
Pokaż więcej
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Powiązania:
https://bibliotekanauki.pl/articles/298048.pdf  Link otwiera się w nowym oknie
Opis:
This article presents a proposal for recognizing the weather and part of a day in digital photos encoded in the bitmap format, based on auctorial edge detection algorithm of horizon to demarcate the sky and k-nearest neighbours algorithm, to classify the daytime in the picture as “day” or “night” and to classify the weather as “sunny” or “cloudy”. To verify the effectiveness of the classification the Internal Bagging-5 model was applied. The data for surveys in the form of pictures was prepared on self-provision. To test the method in a different location, data from the Internet was used.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sequential classification methods
Autorzy:
Krzyśko, M.
Tematy:
Classification and discrimination,cluster analysis
Pokaż więcej
Wydawca:
Polskie Towarzystwo Matematyczne
Powiązania:
https://bibliotekanauki.pl/articles/747563.pdf  Link otwiera się w nowym oknie
Opis:
Artykuł nie zawiera streszczenia
Sequential classification methods are suggested for the case of two or more populations. First, a method for two populations with known probability densities is presented. The method is based on the likelihood ratio and Wald's method of sequential testing of simple null hypothesis against an alternative hypothesis. Two approximate methods for obtaining boundaries, in the form of inequalities for the likelihood ratios, are suggested. The classification for more populations is based similarly on simple inequalities for sequential likelihood ratios based on increasing numbers of measurements. The method is completed by the Bayes decision rule used in the case in which the entire a priori established maximal dimension of measurements is reached. Again two ways of obtaining approximate boundaries are presented. As an example for the case of two populations, the sequential classification rules for normal distributions with known mean vectors and known and unequal covariance matrices are constructed. These rules are in fact quadratic discriminant functions for the sequence of dimensions. The rest of the paper is devoted to a comparison of the methods suggested from the point of view of their conservativeness and power.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bayesian discrimination method for special covariance structure
Autorzy:
Pasewicz, Wiesław
Tematy:
Classification and discrimination
cluster analysis
Pokaż więcej
Wydawca:
Polskie Towarzystwo Matematyczne
Powiązania:
https://bibliotekanauki.pl/articles/748617.pdf  Link otwiera się w nowym oknie
Opis:
.
Let us assume that the observed random vector from population has a p-dimensional normal distribution with a mean vector and a positive definite covariance matrix. A multivariate observation is known and it belongs to one of two multivariate normal populations but it is not known to which. Let E be the pxp matrix with each element eąual to unity and let I be the p x p identity matrix. In the paper we consider a Bayesian discrimination between s.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some notes on the IUGS classification of lamprophyric rocks
Autorzy:
Kamvisis, Ioannis
Phani, Pothuri Ramesh Chandra
Tematy:
IUGS
classification
kimberlite
lamproite
lamprophyre
Pokaż więcej
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Powiązania:
https://bibliotekanauki.pl/articles/58810111.pdf  Link otwiera się w nowym oknie
Opis:
The lamprophyric rocks are uncommon volatile-rich melanocratic porphyritic rocks which contain only mafic phenocrysts. The felsic minerals are confined in the groundmass. They occur as dikes, sills and diatremes. The lamprophyric rocks are sometimes associated with diamond deposits. This review article discusses the ongoing debate in igneous petrology regarding the classification of lamprophyric rocks, specifically the Lamprophyre clan vs Lamprophyre facies problem. The background of this debate is rooted in conflicting interpretations of the classification of these rocks, with some researchers grouping them into a super-group called the "Lamprophyre clan" while others emphasize the distinction between the different types of these rocks (Lamprophyre facies). The aim of this study is to provide a comprehensive analysis of relevant literature and propose a more inclusive petrological classification system for lamprophyric rocks by considering the geological setting, petrography, texture, mineralogy, whole-rock geochemistry and isotopic analysis of the various kimberlites, orangeites, lamproites, para-lamproites, calc-alkaline, alkaline and ultramafic lamprophyres. Lastly, the diamond potential is also taken into account. The implications of this study are significant for the international geological community. It proposes the adoption by the IUGS TGIR of both the Lamprophyre clan (as updated by Kamvisis & Phani, 2022, i.e. genetically interrelated rocks) and Lamprophyre facies (as suggested by Mitchell, 1994, i.e. rocks that formed under volatile-rich conditions) concepts to achieve a more widespread consensus among igneous petrologists. Both terms can be correct but they represent different perspectives in the study of these exotic rocks.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improving text classification with vectors of reduced precision
Autorzy:
Pietroń, Marcin
Wielgosz, Maciej
Wróbel, Krzysztof
Duda, Jerzy
Smywiński-Pohl, Aleksander
Wydawca:
SciTePress - Science and Technology Publications
Opis:
This paper presents the analysis of the impact of a floating-point number precision reduction on the quality of text classification. The precision reduction of the vectors representing the data (e.g. TF–IDF representation in our case) allows for a decrease of computing time and memory footprint on dedicated hardware platforms. The impact of precision reduction on the classification quality was performed on 5 corpora, using 4 different classifiers. Also, dimensionality reduction was taken into account. Results indicate that the precision reduction improves classification accuracy for most cases (up to 25% of error reduction). In general, the reduction from 64 to 4 bits gives the best scores and ensures that the results will not be worse than with the full floating-point representation.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Inne
Tytuł:
Differentiation between forms of urban development using the object-oriented classification method with Central Warsaw as the example
Autorzy:
Zaremski, Karol
Szmajda, Dorota
Tematy:
object-oriented classification
land cover
land use
urbanized areas
Ikonos
Warsaw
eCognition
segmentation
classification
Pokaż więcej
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Powiązania:
https://bibliotekanauki.pl/articles/2032468.pdf  Link otwiera się w nowym oknie
Opis:
The aim of the paper is to present automated methods of discrimination of urban development forms using object-oriented classification in high-resolution images taken by the Ikonos satellite. The object-oriented classification makes possible to describe individual classes using not only the spectral reflection values but also the shapes, textures and topology of objects. The classification process as such is based on the theory of fuzzy sets. The research covered an area of 25 km,., situated in central Warsaw. As a result of object-oriented classification, five classes of development typical of large cities were distinguished and described.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Evaluation of Pixel-based and Object-based Classification Methods for Land Use Land Cover Analysis Using Geoinformatic Techniques
Autorzy:
Powar, Sudhir K.
Panhalkar, Sachin S.
Patil, Abhijit S.
Tematy:
pixel-based classification (PBC)
object-based classification(OBC)
maximum likelihood classifier
multi-resolution segmentation
Pokaż więcej
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Powiązania:
https://bibliotekanauki.pl/articles/2055771.pdf  Link otwiera się w nowym oknie
Opis:
Land use land cover (LULC) classification is a valuable asset for resource managers; in many fields of study, it has become essential to monitor LULC at different scales. As a result, the primary goal of this work is to compare and contrast the performance of pixel-based and object-based categorization algorithms. The supervised maximum likelihood classifier (MLC) technique was employed in pixel-based classification, while multi-resolution segmentation and the standard nearest neighbor (SNN) algorithm were employed in object-based classification. For the urban and suburban parts of Kolhapur, the Resourcesat-2 LISS-IV image was used, and the entire research region was classified into five LULC groups. The performance of the two approaches was examined by comparing the classification results. For accuracy evaluation, the ground truth data was used, and confusion matrixes were generated. The overall accuracy of the object-based methodology was 84.66%, which was significantly greater than the overall accuracy of the pixel-based categorization methodology, which was 72.66%. The findings of this study show that object-based classification is more appropriate for high-resolution Resourcesat-2 satellite data than MLC of pixel-based classification.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical Coding of Nominal Data
Autorzy:
Grabowski, Michał
Gniazdowski, Zenon
Wydawca:
Warszawska Wyższa Szkoła Informatyki
Cytata wydawnicza:
Gniazdowski, Z., & Grabowski, M. (2015). Numerical Coding of Nominal Data. Zeszyty Naukowe WWSI, 9(12), 53-61.
Opis:
In this paper, a novel approach for coding nominal data is proposed. For the given nominal data, a rank in a form of complex number is assigned. The proposed method does not lose any information about the attribute and brings other properties previously unknown. The approach based on these knew properties can been used for classification. The analyzed example shows that classification with the use of coded nominal data or both numerical as well as coded nominal data is more effective than the classification, which uses only numerical data.
Dostawca treści:
Repozytorium Centrum Otwartej Nauki
Artykuł
Tytuł:
Ordinal variables in the segmentation of advertisement receivers
Autorzy:
Dziechciarz, Józef
Bak, Andrzej
Walesiak, Marek
Wydawca:
Springer-Verlag
Opis:
Marek Walesiak
The paper presents segmentation study, which employs methods of classification to single out the segments. The variables measured on the ordinal scale were used as the criteria of market segmentation. Variables used reflected students’ attitude towards 20 statements about advertising. Ordinal character of the data required application of specific measure (1) of object’s distance. This measure was used in order to evaluate the similarities of objects, which were based on numbers of relations “equal to”, “greater than” and “smaller than”.
Dostawca treści:
Repozytorium Centrum Otwartej Nauki
Artykuł
Tytuł:
Cartograms – classification and terminology
Autorzy:
Markowska, Anna
Tematy:
cartograms
area cartograms
cartograms’ classification
Pokaż więcej
Wydawca:
Oddział Kartograficzny Polskiego Towarzystwa Geograficznego
Powiązania:
https://bibliotekanauki.pl/articles/92414.pdf  Link otwiera się w nowym oknie
Opis:
The author discusses new classifications of cartograms. Cartographic anamorphoses terminology and a multi-level classification, including not only cartograms but also anamorphical projections, have been proposed. The selected area cartograms’ classes were discussed in detail and compared.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical Coding of Nominal Data
Autorzy:
Gniazdowski, Z.
Grabowski, M.
Tematy:
nominal data
numerical data
classification
Pokaż więcej
Wydawca:
Warszawska Wyższa Szkoła Informatyki
Powiązania:
https://bibliotekanauki.pl/articles/91423.pdf  Link otwiera się w nowym oknie
Opis:
In this paper, a novel approach for coding nominal data is proposed. For the given nominal data, a rank in a form of complex number is assigned. The proposed method does not lose any information about the attribute and brings other properties previously unknown. The approach based on these knew properties can been used for classification. The analyzed example shows that classification with the use of coded nominal data or both numerical as well as coded nominal data is more effective than the classification, which uses only numerical data.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of Machine Learning Techniques for Fetal Heart Rate Classification
Autorzy:
Cömert, Z.
Kocamaz, A.
Tematy:
cardiotocography
machine learning techniques
classification
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:
https://bibliotekanauki.pl/articles/1031680.pdf  Link otwiera się w nowym oknie
Opis:
Cardiotocography is a monitoring technique providing important and vital information on fetal status during antepartum and intrapartum periods. The advances in modern obstetric practice allowed many robust and reliable machine learning techniques to be utilized in classifying fetal heart rate signals. The role of machine learning approaches in diagnosing diseases is becoming increasingly essential and intertwined. The main aim of the present study is to determine the most efficient machine learning technique to classify fetal heart rate signals. Therefore, the research has been focused on the widely used and practical machine learning techniques, such as artificial neural network, support vector machine, extreme learning machine, radial basis function network, and random forest. In a comparative way, fetal heart rate signals were classified as normal or hypoxic using the aforementioned machine learning techniques. The performance metrics derived from confusion matrix were used to measure classifiers' success. According to experimental results, although all machine learning techniques produced satisfactory results, artificial neural network yielded the rather well results with the sensitivity of 99.73% and specificity of 97.94%. The study results show that the artificial neural network was superior to other algorithms.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Social Network Inferred Data to Churn Modeling in Telecoms
Autorzy:
Gruszczyński, W.
Arabas, P.
Tematy:
churn reduction
classification
social networks
Pokaż więcej
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Powiązania:
https://bibliotekanauki.pl/articles/308695.pdf  Link otwiera się w nowym oknie
Opis:
The subject of this work is the use of social network analysis to increase the effectiveness of methods used to predict churn of telephony network subscribers. The social network is created on the basis of operational data (CDR records). The result of the analysis is customer segmentation and additional predictor variables. Proposed hybrid predictor employs set of regression models tuned to specific customer segments. The verification was performed on data obtained from one of the Polish operators.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On different ways to classify Internet traffic : a short review of selected publications
O wielu sposobach klasyfikacji ruchu internetowego: krótki przegląd wybranych publikacji
Autorzy:
Foremski, P.
Tematy:
internet
traffic classification
machine learning
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/375768.pdf  Link otwiera się w nowym oknie
Opis:
Traffic classification is an important tool for network management. It reveals the source of observed network traffic and has many potential applications e.g. in Quality of Service, network security and traffic visualization. In the last decade, traffic classification evolved quickly due to the raise of peer-to-peer traffic. Nowadays, researchers still find new methods in order to withstand the rapid changes of the Internet. In this paper, we review 13 publications on traffic classification and related topics that were published during 2009-2012. We show diversify in recent algorithms and we highlight possible directions for the future research on traffic classification: relevance of multi-level classification, importance of experimental validation, and the need for common traffic datasets.
Artykuł prezentuje przegląd 13 wybranych prac z dziedziny klasyfikacji ruchu internetowego pod kątem różnorodności w zastosowanych metodach. Prace zostały wybrane z najciekawszych naszym zdaniem publikacji z ostatnich kilku lat (2009-2012). W porównaniu do istniejących przeglądów literaturowych - np. [13], [14], czy [3] - niniejszy artykuł dotyczy nowszych badań, oraz wykazuje, że łączenie wielu metod klasyfikacji w jeden system może być ciekawym kierunkiem dla przyszłych badań w tej dziedzinie. Klasyfikacja ruchu internetowego polega na odgadnięciu nazwy protokołu komunikacyjnego lub aplikacji, która wygenerowała dany ciąg pakietów IR Informacja ta jest przydatna np. w zarządzaniu ruchem w sieciach internetowych, gdy potrzeba kształtować ruch w zależności od jego rodzaju. Klasyfikacja ruchu znajduje zastosowanie także w zagadnieniach sieciowych związanych z wdrażaniem zasad bezpieczeństwa (np. zakaz stosowania aplikacji Skype), monitorowaniem natężenia ruchu (np. wykrywanie ataków DoS), oraz wielu innych. Przegląd literatury został podzielony na 4 kategorie: klasyfikacja ruchu (rozdział 3.1., prace nr 16), detekcja pojedynczych aplikacji (rozdział 3.2., prace nr 7-8), metody pozyskiwania „wiedzy bazowej" (ang. ground truth, rozdział 3.3., prace nr 9-11), oraz inne (rozdział 3.4., prace nr 12 i 13). Wszystkie prace zostały podsumowane w Tabeli 3. W ostatnim rozdziale (str. 10) prezentujemy wyniki przeglądu. Pokazujemy na przykład, że istnieje wiele metod klasyfikacji, które mogą być połączone w jeden system i wzajemnie się uzupełniać - przez multiklasyfikację (ang. multi-classification] lub obsługę różnych części ruchu (np. [31] dla TCP i [15] dla UDP). Podajemy także nasze rekomendacje dotyczące walidacji metod klasyfikacji i zbierania śladów ruchu internetowego.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Semantic Place Labeling Method
Autorzy:
Siemiatkowska, B.
Harasymowicz-Boggio, B.
Chechlinski, Ł.
Tematy:
mapping
classification
Dempster-Shafer theory
Pokaż więcej
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Powiązania:
https://bibliotekanauki.pl/articles/384729.pdf  Link otwiera się w nowym oknie
Opis:
The paper presents a method of semantic localization of a mobile robot. The robot is equipped with a Sick laser finder and a Kinect sensor. The simplest source of informa tion about an environment is a scan obtained by the range sensor. The polygonal approximation of an observed area is performed. The shape of the polygon allows us to distinguish corridors from other places using a simple rule based system. During the next step rooms are classified based on objects which have been recognized. Each object votes for a set of classes of rooms. In a real environment we deal with uncertainty. Usually probabilistic theory is used to solve the problem but it is not capable of capturing subjective uncertainty. In our approach instead of the classic Bayesian method we proposed to perform classification using Dempster-Shafer theory (DST), which can be regarded as a generalization of the Bayesian theory and is able to deal with subjective uncertainty. The experiments performed in real office environment proved the efficiency of our approach.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selected statistical problems in spatial evaluation of Rn related variables
Autorzy:
Friedmann, H.
Bossew, P.
Tematy:
radon
mapping
geostatistics
uncertainties
classification
Pokaż więcej
Wydawca:
Instytut Chemii i Techniki Jądrowej
Powiązania:
https://bibliotekanauki.pl/articles/148745.pdf  Link otwiera się w nowym oknie
Opis:
Since indoor radon is considered a potential hazard to health, Rn prevention and mitigation are necessary in certain areas. In this article we address the issues of mapping support and resolution, and conceptually discuss two common ways of generating maps from given information. Further, a short overview is given on the sources of uncertainties which are inevitably associated to every estimate and how to treat them. Finally, some possibilities of generating classified risk indices are outlined, since it is most often necessary to classify regions by estimated hazard.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fake News Related to the Coronavirus. Case Study
Autorzy:
Urbanek, Grzegorz
Tematy:
fake news
coronavirus
classification models
Pokaż więcej
Wydawca:
Wyższa Szkoła Bezpieczeństwa Publicznego i Indywidualnego Apeiron w Krakowie
Powiązania:
https://bibliotekanauki.pl/articles/1807823.pdf  Link otwiera się w nowym oknie
Opis:
The aim of the article is to analyze fake news related to coronavirus and assign selected examples to the categories of fake news presented in the literature. Various types of fake news disseminated in the Internet in Polish language were analyzed. The study is preceded by a discussion on the origin, specificity, types, and available classifications of fake news obtained from the available literature. On the basis of the analysis, it can be concluded that many fake news items appeared in the media discussion on the threat of coronavirus, differing in terms of sources, form, and content. Their diversity is reflected in the numerousness of fake news categories, distinguished by the creators of the classifications of this phenomenon.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recognition of human-computer interaction gestures acquired by inertial motion sensors with the use of hidden Markov models
Rozpoznawanie gestów interakcji człowiek-komputer zarejestrowanych przy użyciu inercyjnych czujników ruchu poprzez niejawne modele Markova
Autorzy:
Sawicki, Aleksander
Daunoravičienė, Kristina
Griskevicius, Julius
Tematy:
HMM
classification
HCI
IMU
klasyfikacja
Pokaż więcej
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Powiązania:
https://bibliotekanauki.pl/articles/1818443.pdf  Link otwiera się w nowym oknie
Opis:
The paper presents the algorithm of recognition of selected Human-Computer Interaction (HCI) gestures acquired by inertial motion sensors. The possibilities of using Hidden Markov Models as classifiers have been verified. The experiments investigated the possibility of using a methodology dedicated to the recognition of virtual reality (VR) game gestures to classify HCI gestures. The paper compares the accuracy of classification depending on the method of discretization of the forearm orientation signals. The evaluation of the accuracy of the classification was carried out with the use of 3-fold cross validation. The paper uses author’s data corpus containing in total 720 time series acquired from 20 human subjects.
Artykuł przedstawia algorytm rozpoznawania wybranych gestów interakcji człowiek-komputer zarejestrowanych przy pomocy inercyjnych czujników ruchu. W niniejszej pracy zweryfikowano możliwości wykorzystania niejawnych Modeli Markova jako klasyfikatora. Zbadano możliwości zastosowania metodyki dedykowanej rozpoznawaniu gestów gry VR do klasyfikacji gestów HCI. W pracy dokonano porównania skuteczności klasyfikacji w zależności od sposobu dyskretyzacji zarejestrowanych sygnałów orientacji przedramienia. Ocena skuteczności klasyfikacji odbyła się z wykorzystaniem trójkrotnej walidacji krzyżowej. W pracy wykorzystano autorski korpus danych zawierający 20 uczestników oraz łącznie 720 szeregów czasowych.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimators of the Quadratic Discriminant Function in the Case of Special Covariance Matrices Structure
Autorzy:
Pasewicz, Wiesław
Tematy:
Classification and discrimination, cluster analysis
Pokaż więcej
Wydawca:
Polskie Towarzystwo Matematyczne
Powiązania:
https://bibliotekanauki.pl/articles/747778.pdf  Link otwiera się w nowym oknie
Opis:
.
Let us assume that the observed random vector Z, has a p-dimensional normal distribution with zero-mean vector. In the present paper we discuss estimators of the quadratic discriminant function U(z)=ln(f1(z)/f2(z)).
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the Extremely Low Frequency Magnetic Field Emission from Laptop Computers
Autorzy:
Brodić, D.
Tematy:
classification
ELF
EMF
laptop
measurement
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/221562.pdf  Link otwiera się w nowym oknie
Opis:
This study addresses the problem of magnetic field emission produced by the laptop computers. Although, the magnetic field is spread over the entire frequency spectrum, the most dangerous part of it to the laptop users is the frequency range from 50 to 500 Hz, commonly called the extremely low frequency magnetic field. In this frequency region the magnetic field is characterized by high peak values. To examine the influence of laptop’s magnetic field emission in the office, a specific experiment is proposed. It includes the measurement of the magnetic field at six laptop’s positions, which are in close contact to its user. The results obtained from ten different laptop computers show the extremely high emission at some positions, which are dependent on the power dissipation or bad ergonomics. Eventually, the experiment extracts these dangerous positions of magnetic field emission and suggests possible solutions.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Audio Feature Space Analysis for Emotion Recognition from Spoken Sentences
Autorzy:
Smietanka, Lukasz
Maka, Tomasz
Tematy:
speech analysis
classification
emotional speech
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:
https://bibliotekanauki.pl/articles/1953467.pdf  Link otwiera się w nowym oknie
Opis:
An analysis of low-level feature space for emotion recognition from the speech is presented. The main goal was to determine how the statistical properties computed from contours of low-level features influence the emotion recognition from speech signals. We have conducted several experiments to reduce and tune our initial feature set and to configure the classification stage. In the process of analysis of the audio feature space, we have employed the univariate feature selection using the chi-squared test. Then, in the first stage of classification, a default set of parameters was selected for every classifier. For the classifier that obtained the best results with the default settings, the hyperparameter tuning using cross-validation was exploited. In the result, we compared the classification results for two different languages to find out the difference between emotional states expressed in spoken sentences. The results show that from an initial feature set containing 3198 attributes we have obtained the dimensionality reduction about 80% using feature selection algorithm. The most dominant attributes selected at this stage based on the mel and bark frequency scales filterbanks with its variability described mainly by variance, median absolute deviation and standard and average deviations. Finally, the classification accuracy using tuned SVM classifier was equal to 72.5% and 88.27% for emotional spoken sentences in Polish and German languages, respectively.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
基于基因组的系统发育分析为蜡蝉亚目(Fulgoromorpha)的系统发育关系及进化提供新见解
Phylogenomic insights into the relationship and the evolutionary history of planthoppers (Insecta: Hemiptera: Fulgoromorpha)
Autorzy:
Yapar, Etka
Prus-Frankowska, Monika
Michalik, Anna
Stroiński, Adam
Wahlberg, Niklas
Ghanavi, Hamid Reza
Łukasik, Piotr
Castillo Franco, Diego
Szwedo, Jacek
Deng, Junchen
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Classification systems and their lattice
Autorzy:
Radeleczki, Sándor
Tematy:
concept lattice
CJ-generated complete lattice
atomistic complete lattice
(independent) classification system
classification lattice
box lattice
Pokaż więcej
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Powiązania:
https://bibliotekanauki.pl/articles/729009.pdf  Link otwiera się w nowym oknie
Opis:
We define and study classification systems in an arbitrary CJ-generated complete lattice L. Introducing a partial order among the classification systems of L, we obtain a complete lattice denoted by Cls(L). By using the elements of the classification systems, another lattice is also constructed: the box lattice B(L) of L. We show that B(L) is an atomistic complete lattice, moreover Cls(L)=Cls(B(L)). If B(L) is a pseudocomplemented lattice, then every classification system of L is independent and Cls(L) is a partition lattice.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An approach to unsupervised classification
Autorzy:
Przybyła, T.
Pander, T.
Horoba, K.
Kupka, T.
Matonia, A.
Tematy:
klasyfikacja
grupowanie rozmyte
klasyfikacja nienadzorowana
klasyfikator najbliższych sąsiadów
classification
fuzzy clustering
unsupervised classification
nearest neighbour classifier
Pokaż więcej
Wydawca:
Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Powiązania:
https://bibliotekanauki.pl/articles/333363.pdf  Link otwiera się w nowym oknie
Opis:
Classification methods can be divided into supervised and unsupervised methods. The supervised classifier requires a training set for the classifier parameter estimation. In the case of absence of a training set, the popular classifiers (e.g. K-Nearest Neighbors) can not be used. The clustering methods are considered as unsupervised classification methods. This paper presents an idea of the unsupervised classification with the popular classifiers. The fuzzy clustering method is used to create a learning set. The learning set includes only these patterns that are the best representative of each class in the input dataset. The numerical experiment uses an artificial dataset as well as the medical datasets (PIMA, Wisconsin Breast Cancer) and illustrates the usefulness of the proposed method.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The classification of mechanical models of road pavements
Klasyfikacja modeli mechanicznych nawierzchni drogowych
Autorzy:
Nagórski, R.
Tematy:
nawierzchnia drogowa
modelowanie mechanistyczne
klasyfikacja modeli
kryteria klasyfikacyjne
road pavement
mechanistic modelling
models classification
classification criteria
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/231195.pdf  Link otwiera się w nowym oknie
Opis:
The paper contains a review of mechanical models of road pavements in the form of a proposal of classification of these models. It is assumed an autonomy of the following elements of the pavement model: the models of structural layers, the subgrade model, the interlayer bonding models, including bonding of pavement structure with its subgrade, models of external impacts on pavement layers, including the load of heavy traffic, models of pavement environment impacts on structural layers’ borders (lateral) and subgrade borders (including the lower one) – according to the criteria selected by paper Author - in the frame of assumptions of the classical Newtonian deterministic mechanics. The above elements of pavement modelling can be combined respectively into certain rational (correct, useful) sets, which define the specified models of the whole road pavement.
Praca zawiera przegląd modeli mechanicznych nawierzchni drogowych w formie propozycji klasyfikacji tych modeli. Założono autonomię w tworzeniu następujących elementów modelu nawierzchni: modele warstw konstrukcyjnych, model podłoża, modele połączeń (wiązań) międzywarstwowych, w tym konstrukcji nawierzchni z podłożem, modele oddziaływań zewnętrznych na warstwy nawierzchni, model obciążenia nawierzchni ruchem ciężkich pojazdów, modele oddziaływań otoczenia zewnętrznego nawierzchni na granice warstw konstrukcyjnych i na granice podłoża - zgodnie z kryteriami klasyfikacyjnymi przyjętymi przez Autora - w ramach założeń mechaniki klasycznej i deterministycznej Newtona. Powyższe elementy modelowania nawierzchni mogą być odpowiednio zestawione w całościowe modele nawierzchni drogowej.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Non-specific low back pain – what does it exactly mean? A proposed redefinition and classification of the problem
Autorzy:
Małecki, Jacek
Tematy:
low back pain
classification
triage syndrome
Pokaż więcej
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Powiązania:
https://bibliotekanauki.pl/articles/454759.pdf  Link otwiera się w nowym oknie
Opis:
Introduction. Analysis of the medical literature shows that non-specific low back pain is a multifaceted affliction. Determining the unequivocal definition and classification of the ailment could be somewhat difficult. The following review presents a multiplicity of common low back pain nuances. The paper also shows necessity of unification of the definition and clarification, for placing non-specific low back pain among other musculoskeletal disorders. Aim. The author will attempt to provide the answers to basic questions about non-specific low back pain. In its form, the paper will have similarities to the prospect study with narrative review features. Although the reader should remember that the article is neither a result of expert team efforts nor non-specific low back pain leading authority opinion. Therefore the suggestions should be interpreted with necessary distance and scientific scepticism. Material and methods. Proper publications were searched in PubMed and EBSCO scientific articles databases, using terms: ‘nonspecific low back pain’ or ‘non-specific low back pain’, ‘definition’, ‘diagnostic triage’, and ‘classification’ in different combinations. Results. As a result of the review, subtle correction of the current non-specific low back pain definition has been proposed. Acknowledgments. The author of this review wishes to show his appreciation to Prof. Edward Saulicz, the promotor and mentor for didactic support, methodologic and merythoric advice, and for manuscript correction. Thanks also extended to colleague Łukasz Sejboth, master of physiotherapy, for help with appropriate references and motivation to scientific exploration with his unassailable attitude and professionalism. Furthermore, author would like to acknowledge Keith Littlewood for his kind and valid amendments in the English version of the manuscript.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Klasyfikacja stanów przedkrytycznych
Classification of pre-critical states
Autorzy:
Topczewska, M.
Frischmuth, K.
Tematy:
klasyfikacja
ekstrakcja cech
classification
feature extraction
Pokaż więcej
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:
https://bibliotekanauki.pl/articles/154431.pdf  Link otwiera się w nowym oknie
Opis:
Praca zawiera przykład klasyfikacji danych rzeczywistych opisujących sygnały niekrytyczne, przedkrytyczne i krytyczne. Celem jest rozpoznanie stanów niebezpiecznych tak wcześnie jak to możliwe. Ze względu na brak separowalności liniowej danych w celu separacji klas użyto klasyfikacji hierarchicznej z cięciami za pomocą klasyfikatorów liniowych oraz z podejściem one-versus-rest z wyróżnioną klasą sygnałów bezpiecznych. W wyniku ośmiu cięć uzyskano ostateczny podział przestrzeni skutkujący odseparowaniem klasy sygnałów bezpiecznych od podejrzanych, tj. przedkrytycznych i krytycznych oraz dający najmniejszą liczbę błędnie sklasyfikowanych obiektów z klasy sygnałów niekrytycznych.
The paper presents an application of classification methods to time-continuous signals (1). Signals with values that exceed a certain critical maximum are called dangerous or critical, otherwise we speak about normal or routine operation of the system under consideration, Fig. 1. The problem is to recognize pre-critical states, i.e. states preceding the actual dangerous ones, and that as early as possible. False negative classifications may have very serious consequences, while false positive verdicts cause expensive but unnecessary counter-measures. As pre-processing, the input signals are characterized by a number of features, which form sequences of vector data, indexed by the cycle number (2). In a first stage, suspicious feature vectors are selected, from which in a second sweep unlikely candidates are removed. The focus of the present paper is this second stage, i.e. the distinction between actual pre-critical and the harmless routine states among the suspicious states, indicated in the first stage by a certain preliminary test. The choice of features and the logic behind the preliminary test are beyond our present scope. Let it suffice to say that the first step is a combination of Principal Component Analysis and some statistical test, and that it is very effective but unspecific in the application at hand.For the real-world data we used to develop the method, it turned out that the obtained feature vectors were linearly non-separable. For that reason a hierarchical approach was applied, where in several steps linear cuts (4,5) of the one-versus-rest type were performed in order to single out the true pre-critical states. For the example under consideration, in eight iterations separation between pre-critical and non-pre-critical ones was achieved. We succeeded to keep the number of wrong negatives at zero while reducing the number of wrong positives to a fraction of the starting value, established by the preliminary test, Fig. 3, 4, 5. The final sensitivity, for the given data set, is 100%, and the achieved specificity is at 93.15%. Numerical experiments, using nonlinear classifiers on much larger data sets, are under way. The present aim is to find an optimal set of features and a one-step criterion which further improves the quality of the classification.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Porównanie wyników klasyfikacji obrazów satelitarnych HYPERION i ALI
Comparison of HYPERION and ALI satellite imagery classification
Autorzy:
Hejmanowska, B.
Tematy:
klasyfikacja obrazu
HYPERION
ALI
image classification
Pokaż więcej
Wydawca:
Stowarzyszenie Geodetów Polskich
Powiązania:
https://bibliotekanauki.pl/articles/130788.pdf  Link otwiera się w nowym oknie
Opis:
Celem przeprowadzonych badan było porównanie wyników klasyfikacji obrazów satelitarnych - hiperspektralnych: HYPERION i wielospektralnych: ALI, zarejestrowanych w zakresach spektralnych podobnych do obrazu: LANDSAT. Testy prowadzono na obszarze leżącym na wschód od aglomeracji krakowskiej, dla którego dysponowano obrazami z platformy EO – 1 zarejestrowanymi w 2006 roku, dzięki projektowi KBN (nr 3T 09D 09429). W badaniach wykorzystano oprogramowanie specjalistyczne (ENVI 4.1) dedykowane opracowaniom danych teletedetekcyjnych. Obrazy HYPERION zostały wstępnie przetworzone w celu usunięcia zakłóceń spowodowanych wpływem atmosfery i tzw. efektem „smiling”. Klasyfikacje przeprowadzono tylko metodami tradycyjnie wykorzystywanymi w przetwarzaniu obrazów wielospektralnych, czyli za pomocą klasyfikacji nienadzorowanej i nadzorowanej. Założenie metodyczne porównania wyników klasyfikacji polegało na wykorzystaniu dla obu obrazów tych samych uczących pól treningowych i podobnych pól kontrolnych wykorzystywanych do oceny dokładności. Ponadto wszystkie parametry zastosowanych algorytmów były równie_ identyczne dla obu obrazów. Pola treningowe i testowe wybierano manualnie z wykorzystaniem kompozycji barwnych. W trakcie prowadzenia testów zaistniała konieczność zredukowania liczby analizowanych kanałów obrazu HYPERION, ponieważ w przeciwnym razie nie uzyskiwano zadawalających wyników klasyfikacji. W takim przypadku dokładność klasyfikacji obrazu HYPERION była wyższa ni_ dokładność klasyfikacji obrazu ALI. Natomiast wynik klasyfikacji wszystkich kanałów obrazu HYPERION albo w ogóle był nie do zaakceptowania, albo wynik klasyfikacji był znacznie gorszy ni_ w przypadku ALI i ograniczonej liczby kanałów HYPERION.
The main aim of the research was to compare the results of satellite image classification: HYPERION and ALI, recorded in a spectral range similar to LANDSAT. Analyses were performed using the test area to the east of Krakow. Satellite iamges were obtained in 2006 thanks to scientific project KBN (no. 3T 09D 09429). The image processed with ENVI. HYPERION was initially preprocessed to remove so-called atmospheric effects, and so-called “similing” effect. The classification was performed using conventional spectral methods: unsupervised and supervised classification. The background of the comparison was applied in the same training and control area, and the same parameters of classification. Training and control areas ware selected using colour compositions. In the research, a need to reduce the amount of HYPERION channels emerged, otherwise the classification results would not be possible to interpret. In such case, the accuracy of HYPERION channel reduction classification was higher than that of ALI. The result of classification of all HYPERION image channels, however, was either completely unacceptable, or the classification result was much worse than in the case of ALI and limited number of HYPERION channels.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Typologia zagrożeń
Classification of Threats
Autorzy:
Kaczmarczyk, B.
Tematy:
bezpieczeństwo
zagrożenie
typologia
safety
threat
classification
Pokaż więcej
Wydawca:
Centrum Naukowo-Badawcze Ochrony Przeciwpożarowej im. Józefa Tuliszkowskiego
Powiązania:
https://bibliotekanauki.pl/articles/373313.pdf  Link otwiera się w nowym oknie
Opis:
Cel: Zaprezentowanie podziału zagrożeń według kryteriów w szczególności podmiotowego, przedmiotowego, przestrzennego. Metody: W celu realizacji zadania wyodrębniono kryteria podziału i zastosowano metody teoretyczne służące wyodrębnieniu grup zagrożeń. Wyniki: Rozważania na temat zagrożeń są złożone. Zagrożenia towarzyszą człowiekowi w różnym wymiarze i formie od lat i będą pojawiać się zawsze. Zmienia się jedynie ich nasilenie i rodzaj. Powyższa sytuacja jest wynikiem zmieniającej się między innymi sytuacji na arenie międzynarodowej, jak również krajowej. Przeciwdziałanie zagrożeniom wymaga prowadzenia ciągłych badań. Skuteczność badań możliwa jest poprzez m.in. skuteczne klasyfikowanie tychże zagrożeń. Zmienność środowiska bezpieczeństwa powodować będzie zmianę kryteriów typologicznych zagrożeń. Zmieniać się będzie charakter a zatem zmieniać się będą kryteria podziału zagrożeń. Tylko część z obecnie wyodrębnianych nie będzie podlegać tym zmianom. Należeć do nich będą najprawdopodobniej podmiot, przedmiot i czas. Zmienność ta wymaga monitorowania tychże zagrożeń a na tej podstawie prowadzenia procesów poznawczych. Prowadząc rozważania na temat typologii zagrożeń, wciąż poszukuje się kryteriów, których suma umożliwi pełnie jej przedstawienie. Do kryteriów tych zaliczyć należy: źródło pochodzenia zagrożenia, miejsce pochodzenia źródła zagrożenia, obecność czynnika militarnego, aktualność zagrożeń, wiedzę o zagrożeniu, czas, częstotliwość, intensywność, zasięg, symptomy, liczbę czynników zagrażających oraz stopień i zakres destrukcji. Katalog kryteriów stale podlega weryfikacji i jest uzupełniany w zależności od zmieniającego się środowiska. Proces poznawczy w tym zakresie wciąż trwa. Wnioski: Prowadząc badania zagrożeń, dokonuje się ich podziałów przy uwzględnieniu wyodrębnionych kryteriów. Powyższe stosowane jest w celu dokładniejszego zbadania obszaru zagrożeń. Jest to proces trudny i złożony, jednak nie niemożliwy. Dyskusje w powyższym zakresie mieszczą się w wielu dziedzinach i dyscyplinach naukowych. Wskazuje to na interdyscyplinarny charakter tej problematyki. Naukowa eksploracja problematyki związanej z zagrożeniami nie pozwala dziś wyodrębnić wspólnych kryteriów w wielu dziedzinach i dyscyplinach naukowych, które w sposób jednoznaczny pozwoliłyby na wprowadzenie do nauki wspólnej typologii zagrożeń. Powyższe nie zwalnia jednak z obowiązku poszukiwania takich rozwiązań. Niniejszy artykuł jest próbą takiej przeglądowej eksploracji. U podstaw tego stanowiska znajdują się rozwiązania wykorzystane w artykule będące wnioskami z badań prowadzonych przez ekspertów różnych dziedzin i dyscyplin naukowych. Uwidacznia się wyraźna potrzeba konsolidacji wysiłków ekspertów w wielu zakresach bezpieczeństwa. Przedstawione w artykule treści to jedynie głos w dyskusji, który może stanowić inspirację do dalszych rozważań w przedmiotowym zakresie.
Aim: To categorise threats according to given criteria, in particular: subjective, objective and time related. Method: In order to achieve the desired purpose, categories were exposed and theoretical approaches harnessed to differentiate threat groups. Results: The discourse concerning threats is complex. Threats emerged in the past, occur now and will prevail in the future. They accompanied humans in different forms and scale for many years. One element which is changing concerns the intensity of threats. The aforementioned scenario is the consequence of the changing environment, at national and international level. A pre-requisite to the eradication of threats is the conduct of research. The changing state of security in the environment will contribute towards a change in classification of threat criteria. There will be changes in the nature of threats and, correspondingly, threat categorisation criteria will also vary. Only a part of today’s model will be unaffected by such variations. Most probably subjective, objective and time related threats will prevail as they are. Any variability will require monitoring and, on that basis, will call for the conduct of cognitive processes. The processes involving classification of risks requires constant updating to the extent where the aggregate of classes will represents the whole. The criteria list should incorporate the following: source of threat, location of the source of threat, presence of a military factor, verity of threat, knowledge of threat, time, frequency, intensity, range, symptoms, number of threat elements as well as the degree and range of destruction. The criteria list is constantly exposed to validation and updating, in tandem with the changing environment. This identification process is continuous. Conclusions: Research of threats is accompanied by identification and classification of discrete criteria. This is necessary so that the extent of a threat can be examined further. The process is complex and difficult, but not impossible. Discourse concerning this issue is found in a range of scientific research disciplines. Consequently, this indicates an interdisciplinary character of the problem. Scientific exploitation of problems associated with threats, does not allow for fragmentation of criteria which, are common to many fields of science and which, could benefit from a common approach to the classification of threats. Encountered difficulties, do not relieve researches from an obligation to search for solutions. The review contained in this article, provides an attempt at such an exploitation. The basis for such a view is contained in solutions exposed by the article which, reproduces research conclusions determined by experts from a range of science disciplines. This article highlights a clear need for a joint expert approach in many areas dealing with safety. Presented material is simply a voice in a discussion which, may provide a springboard for further research of the topic.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Clustering algorithm for classification methods
Autorzy:
Łęski, J.
Jeżewski, M.
Tematy:
grupowanie
klasyfikacja
clustering
classification
class boundaries
Pokaż więcej
Wydawca:
Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Powiązania:
https://bibliotekanauki.pl/articles/333004.pdf  Link otwiera się w nowym oknie
Opis:
Classification plays an important role in many fields of life, including medical diagnosis support. In the paper, fuzzy clustering algorithm dedicated to classification methods is proposed. Its goal is to find pairs of prototypes located near boundaries of both classes of objects. The minimization procedure of the proposed criterion function is described. The algorithm for determining the value of the clustering parameter is also presented. Presented results (synthetic dataset) confirm correctness of clustering - most of final prototypes, determined based on obtained pairs, are located between boundary of two classes.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new classification of Nyirábrany, an ordinary chondrite from Hungary
Autorzy:
Mészáros, M.
Kereszturi, A.
Ditrói-Puskás, Z.
Tematy:
chondrite
classification
L and LL chondrites.
Pokaż więcej
Wydawca:
Polskie Towarzystwo Meteorytowe
Powiązania:
https://bibliotekanauki.pl/articles/411486.pdf  Link otwiera się w nowym oknie
Opis:
The Nyirábrany meteorite is an ordinary chondrite from Hungary that fell in 1914 and, to date, has been studied very little. The aim of this work was to carry out a more detailed examination of this meteorite (using optical polarization microscope, energy dispersive X-ray spectroscopy and Raman micro spectroscopy) and re-investigate its previous classification as an LL5 type ordinary chondrite, moreover to complete its classification with a shock stage and a weathering grade. Our new results indicate that Nyirábrany could be a transition type between the L and LL chondrites. The main mineral phases of Nyirábrany are olivine, pyroxene and opaque minerals (e.g. Fe-Ni metal, troilite, chromite), minor constituents are plagioclase, Cl-apatite, cristobalite and glass. The Fe-Ni metal content (1.32 vol%) of Nyirábrany is typical of the LL group, the Fa content of olivines (26.71 mol%) is between the range of the L and LL types, while the Fs-content of the low-Ca pyroxenes (20.51 mol%) is typical of the L-chondrites. Chondrules appear in different sizes, mineral compositions and textures. The textural and mineralogical features (e.g. mostly homogeneous silicate minerals, dominance of clinopyroxenes, recrystallized matrix, well-defined chondrules) indicate petrological type 4-5 for Nyírábrány. The shock stage and the weathering grade of this meteorite were examined for the first time. On the basis of the observed optical and textural features of the olivine grains (e. g. sharp optical extinction, irregular and planar fractures) Nyirábrany has an S2 shock stage. About 30–40% of the opaque phases are affected by oxidation, which shows a W2 weathering grade.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Histerektomia brzuszna – przestrzenny model chirurgicznej resekcji tkankowej
Abdominal hysterectomy – spatial model of surgical resection
Autorzy:
Zdrodowski, Michał
Knapp, Paweł
Szyłejko, Alicja
Bernaczyk, Piotr
Tematy:
classification
hysterectomy
parametrium
histerektomia
klasyfikacja
przymacicza
Pokaż więcej
Wydawca:
Medical Communications
Powiązania:
https://bibliotekanauki.pl/articles/1030283.pdf  Link otwiera się w nowym oknie
Opis:
The paper presents current views on radical hysterectomy classification, including descriptive comments regarding the surgical extent and medical indications. Radical hysterectomy remains the primary surgical procedure in gynecologic oncology and is of particular importance for the treatment of patients with cervical cancer. A number of publications of the last decades failed to anatomically define radical hysterectomy – it was assumed that the issue is familiar based on Wertheim’s description. Attempts to systematize the therapeutic procedure resulted in a classification adapted to the current state of knowledge. Classification of radical hysterectomy published by Querleu and Morrow’s and later modified by Cibula and Abu-Rustum is the most current and commonly accepted system. The authors systematized previous, less precise classification, thus allowing to standardize terminology used in surgery reports, medical publications, clinical protocols and randomized trials. The uniqueness of this concept is due to the use of a three-dimensional model – Cibula and Abu-Rustum describe pelvic anatomical landmarks, allowing for a proper spatial orientation at different stages of surgical procedure, as well as the borders of resection for different anatomical elements (parametrium in particular). Standardization of radical hysterectomy procedure is also a key element in the education of gynecologic oncologists. Therefore, the presented classification should be known and used in everyday surgical practice.
Celem pracy jest przedstawienie aktualnych poglądów na temat klasyfikacji zabiegów radykalnego usunięcia macicy z przydatkami wraz ze szczegółowym komentarzem co do zakresu operacji i wskazań do jej wykonania. Radykalna histerektomia pozostaje podstawowym zabiegiem chirurgicznym stosowanym w ginekologii onkologicznej, mającym szczególne znaczenie w leczeniu pacjentek z rakiem szyjki macicy. Wiele publikacji z ostatnich kilkudziesięciu lat nie definiowało anatomicznie zabiegu histerektomii radykalnej – zakładano znajomość tego zagadnienia na podstawie opisu podanego przez Wertheima. Próby usystematyzowania procedury terapeutycznej doprowadziły do stworzenia klasyfikacji dostosowanej do obecnego stanu wiedzy. Najaktualniejszą powszechnie akceptowaną klasyfikacją jest modyfikacja podziału Querleu i Morrowa dokonana przez Cibulę i Abu-Rustuma. Autorzy uporządkowali dotychczasowe, mniej precyzyjne podziały, co pozwoliło na standaryzację nazewnictwa używanego w raportach operacyjnych, publikacjach medycznych, protokołach klinicznych i badaniach randomizowanych. Unikatowość tego ujęcia wynika z zastosowania trójwymiarowego wzorca przestrzennego – Cibula i Abu-Rustum opisują orientacyjne punkty anatomiczne miednicy mniejszej, umożliwiające właściwą orientację na poszczególnych etapach procedury chirurgicznej, a także granice resekcji poszczególnych elementów anatomicznych (zwłaszcza przymacicz). Wystandaryzowanie procedury histerektomii radykalnej to również kluczowy element edukacji ginekologów onkologów. Prezentowana klasyfikacja powinna więc być znana i stosowana w codziennej praktyce chirurgicznej.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Application of Mobile Robots for Building Safety Control
Autorzy:
Siemiatkowska, B.
Hrasymowicz-Boggio, B.
Wisniowski, M.
Tematy:
mapping
classification
control
mobile robot
safety
Pokaż więcej
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Powiązania:
https://bibliotekanauki.pl/articles/950822.pdf  Link otwiera się w nowym oknie
Opis:
In this article we propose the application of service mobile robots for control of building safety parameters. Indoor mobile robots are becoming a reality and their availability and applications are expected to grow rapidly in the near future. Such robots are usually equipped with cameras and laser range finders, which could be used to detect hazardous situations in their operating environment, such as evacuation route obstructions, emergency sign occlusions or accumulation of dangerous materials. We demonstrate how these safety-related augmentations of a mobile robot system can be achieved with few additional resources and validate experimentally the concept using an indoor robot for emergency sign and evacuation route control.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the Application of Classification Trees to Analyze Customer Loyalty and Satisfaction
O zastosowaniu drzew klasyfikacyjnych w analizie satysfakcji i lojalności klientów
Autorzy:
Michalak, Jarosław
Tematy:
classification tree
customer loyalty and satisfaction
Pokaż więcej
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Powiązania:
https://bibliotekanauki.pl/articles/906873.pdf  Link otwiera się w nowym oknie
Opis:
It became more important to recognize customer expectations and to oiler product properties, which convince customer to buy the analyzed product. In customer loyalty and satisfaction analysis methods, classification trees play a very important role. The aim of the paper is to present an application of tree - structured models to analyze product properties influencing buying decision of the target group.
Rozpoznawanie oczekiwań klientów co do jakości oferowanych im produktów odgrywa istotną rolę w planowaniu strategii marketingowej firmy. W artykule zaproponowano wykorzystanie metody rekurencyjnego podziału w analizie lojalności i satysfakcji klientów firmy Paul Hartmann, zainteresowanych nabyciem ciśnieniomierzy. Celem prowadzonych badań było wskazanie tych cech produktu, które mają największe znaczenie w procesie podjęcia decyzji o jego zakupie oraz opisanie reguł klasyfikacyjnych, dotyczących klientów grupy docelowej.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kohonen self-organizing maps for symbolic objects
Samoorganizujące się mapy Kohonena dla obiektów symbolicznych
Autorzy:
Dudek, Andrzej
Tematy:
Classification
visualization
symbolic data
neural networks
Pokaż więcej
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Powiązania:
https://bibliotekanauki.pl/articles/907030.pdf  Link otwiera się w nowym oknie
Opis:
Visualizing data in the form of illustrative diagrams and searching, in these diagrams, for structures, clusters, trends, dependencies etc. is one of the main aims of multivariate statistical analysis. In the case of symbolic data (e.g. data in form of: single quantitative value, categorical values, intervals, multi-valued variables, multi-valued variables with weights), some well-known methods are provided by suitable 'symbolic' adaptations of classical methods such as principal component analysis or factor analysis. An alternative visualization of symbolic data is obtained by constructing a Kohonen map. Instead of displaying the individual items k = 1,..., n by n points or rectangles in a two dimensional space, the n items are first clustered into a number m of mini-clusters and then these mini-clusters are assigned to the vertices of a rectangular lattice of points in the plane such that 'similar' clusters are represented by neighbouring vertices in the lattice.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Classification of rural areas in Poland in the context of revitalization
Autorzy:
Pałka-Łebek, Ewa
Kiniorska, Iwona
Tematy:
rural areas
revitalization
problem areas
classification
Pokaż więcej
Wydawca:
Uniwersytet Gdański. Instytut Geografii
Powiązania:
https://bibliotekanauki.pl/articles/1199395.pdf  Link otwiera się w nowym oknie
Opis:
The article aims to show the classification of Polish rural areas in the context of revitalization process. This work shows the research making in Polish rural areas concerning this new, important process. Taking experiences from development of rural regions in European Union self-government created the programs called “Revival of the country” and revitalization. These are the most important and the largest regional enterprises implemented by the rural society and also for rural society. It had favorable influence on the preservation and development of the rural identity and integrity at their full range. Nowadays the revitalization process is very important factor of versatile rural economy development.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pseudo Bayesian and Linear Regresssion Global Thresholding
Autorzy:
Aboura, K.
Tematy:
classification
image thresholding
probability
linear regression
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/226162.pdf  Link otwiera się w nowym oknie
Opis:
Classification is an important task in image analysis. Simply recognizing an object in an image can be a daunting step for a computer algorithm. The methodologies are often simple but rely heavily on the thresholding of the image. The operation of turning a color or gray-scale image into a black and white image is a determining step in the effectiveness of a solution. Thresholding methods perform differently in various problems where they are often used locally. Global thresholding is a difficult task in most problems. We highlight a pseudo Bayesian and a linear regression global thresholding methods that performed well in an engineering problem. The same approaches can be used in biomedical applications where the environment is better controlled.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
«Обманы затопили мир...» (Борис Егоров о разновидностях обмана в русской культуре)
Autorzy:
Łucewicz, Ludmiła
Tematy:
Egorov
deception
Russian culture
classification
study
Pokaż więcej
Wydawca:
Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach
Powiązania:
https://bibliotekanauki.pl/articles/1826493.pdf  Link otwiera się w nowym oknie
Opis:
The principal items of B.F. Egorov book are described in the article Deception in the Russian culture (2012). It is marked that the scientist considered deception on the basis of the enormous material - historical (from antiquity to the soviet epoch inclusively) and modern (from alteration to our days), attracted for com-parison facts, inherent not only to Russian but also to other national cultures (from east mythology and Homer to the modern American culture). Attention is paid to the offered by the scientists classification of deceptions, where the the-matic principle is the basis (socio-political, economical, psychological, domestic, soldiery, geographical, medical deceptions, as well as deceptions in area of reli-gion, in science, in literature and art; deceptions are specially distinguished with a sign plus), meaningfulness of research is underlined by the scientist of such covinous forms, as silences, mystifications, imitations and plagiarism, as also the actuality of problem of intercommunications of deception and game.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inequality in Economics: The Concept, Perception, Types, and Driving Forces
Autorzy:
Jabłoński, Łukasz
Tematy:
inequality
classification
mainstream economics
heterodox economics
Pokaż więcej
Wydawca:
Akademia Leona Koźmińskiego w Warszawie
Powiązania:
https://bibliotekanauki.pl/articles/1810493.pdf  Link otwiera się w nowym oknie
Opis:
Purpose: The aim of the paper is to overview the research on inequalities in economics. The paper is based on mainstream and heterodox economic theories and approaches addressing inequality and its economic interdependence. Methodology: Due to its positive and normative nature, inequality is a complex concept that eludes precise definition. The available application of mainstream and heterodox approach to study inequality and its economic interdependence allows for the identification of various components of inequality. Classifications that fall within the mainstream economics especially reveal less numerous and often even different types of inequalities compared to heterodox approaches. Moreover, what determines within-country inequality is the number of driving forces related to the factual and regulatory sphere of an economy. Findings: This study does not exhaust the general debate over inequality in economics. The question remains about the state of research dedicated to the outcomes of inequality, for instance, perceived in its dynamic and historical perspective. Moreover, there emerges a need to overview the theoretical and empirical research dedicated to inequality in terms of not only its driving forces but also economic outcomes.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computer database "NEVI" on endangerment by melanoma
Autorzy:
Hippe, Z. S.
Tematy:
nevi pigmentosi
classification
virtual visualization
TDS
Pokaż więcej
Wydawca:
Politechnika Gdańska
Powiązania:
https://bibliotekanauki.pl/articles/1954504.pdf  Link otwiera się w nowym oknie
Opis:
A database containing statistically meaningful numbers of carefully verified cases of nevi pigmentosi (in four categories: benign nevus, blue nevus, suspicious nevus, and malignant melanoma) is described. Various experiments of controlled data mining were performed in order to gain insight into the interpretation of the TDS (total dermatoscopic score) coefficient, which is broadly used in the initial classification of endangerment by melanoma tumours.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Objective classification of empirical probability distributions and the issue of event detection
Autorzy:
Granat, J.
Wierzbicki, A. P.
Tematy:
objective classification
event detection
multicriteria analysis
Pokaż więcej
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Powiązania:
https://bibliotekanauki.pl/articles/308105.pdf  Link otwiera się w nowym oknie
Opis:
The paper concentrates on the issue of classification of empirical probability distributions (histograms), which is useful both in management situations and in event detection or event mining. While existing approaches to event detection concentrate on the use of selected moments or other characteristics of empirical probability distributions, we postulate that full empirical distribution preserves more of needed information then selected moments of this distribution, thus multiple criteria classification of distributions can be most effective in event detection.
Dostawca treści:
Biblioteka Nauki
Artykuł

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies