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Wyszukujesz frazę "bagging" wg kryterium: Temat


Tytuł:
Friedman and Wilcoxon Evaluations Comparing SVM, Bagging, Boosting, K-NN and Decision Tree Classifiers
Autorzy:
Biju, V. G.
Prashanth, CM
Tematy:
bagging
boosting
SVM
KNN
decision tree
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Wydawca:
Społeczna Akademia Nauk w Łodzi
Powiązania:
https://bibliotekanauki.pl/articles/108646.pdf  Link otwiera się w nowym oknie
Opis:
This paper describes a number of experiments to compare and validate the performance of machine learning classifiers. Creating machine learning models for data with wide varieties has huge applications in predictive modelling across multiple domain of science. This work reviews state of the art techniques in machine learning classifiers methods with several extent of magnitude in statistics and key findings that will be helpful in establishing best methodological practices for class predictions. Comprehensive comparative review analysis with statistical validations for various machine learning algorithm for SVM, Bagging, Boosting, Decision Trees and Nearest Neighborhood algorithm on multiple data sets is carried out. Focus on the statistical analysis of the results using Friedman-Test and Wilcoxon Test as well as other interpretative metrics like classification rate, ROC, F-measure are evaluated to benchmark results.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bagging and boosting techniques in prediction of particulate matters
Autorzy:
Triana, D.
Osowski, S.
Tematy:
ensemble of predictors
bagging
boosting
PM pollution
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Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/202449.pdf  Link otwiera się w nowym oknie
Opis:
The paper presents new ensemble solutions, which can forecast the average level of particulate matters PM10 and PM2.5 with increased accuracy. The proposed network is composed of weak predictors integrated into a final expert system. The members of the ensemble are built based on deep multilayer perceptron and decision tree and use bagging and boosting principle in elaborating common decisions. The numerical experiments have been carried out for prediction of daily average pollution of PM10 and PM2.5 for the next day. The results of experiments have shown, that bagging and boosting ensembles employing these weak predictors improve greatly the quality of results. The mean absolute errors have been reduced by more than 30% in the case of PM10 and 20% in the case of PM2.5 in comparison to individually acting predictors.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bootstrap Aggregation Technique for Evaluating the Significance of Manufacturing Process Parameters in the Glass Industry
Autorzy:
Paśko, Łukasz
Kuś, Aneta
Tematy:
manufacturing process
glassworks
neural networks
bagging
manufacturing parameters
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Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Powiązania:
https://bibliotekanauki.pl/articles/2069741.pdf  Link otwiera się w nowym oknie
Opis:
The article presents the application of the bootstrap aggregation technique to create a set of artificial neural networks (multilayer perceptron). The task of the set of neural networks is to predict the number of defective products on the basis of values of manufacturing process parameters, and to determine how the manufacturing process parameters affect the prediction result. For this purpose, four methods of determining the significance of the manufacturing process parameters have been proposed. These methods are based on the analysis of connection weights between neurons and the examination of prediction error generated by neural networks. The proposed methods take into account the fact that not a single neural network is used, but the set of networks. The article presents the research methodology as well as the results obtained for real data that come from a glassworks company and concern a production process of glass packaging. As a result of the research, it was found that it is justified to use a set of neural networks to predict the number of defective products in the glass industry, and besides, the significance of the manufacturing process parameters in the glassworks company was established using the developed set of neural networks.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Deep learning for glaucoma diagnosis
Głębokie uczenie dla diagnostyki jaskry
Autorzy:
Knapik, Andrzej
Opis:
Celem niniejszej pracy magisterskiej było stworzenie oprogramowania, które w pełni automatycznie dokonywać będzie diagnozy jaskry na podstawie kolorowych zdjęć siatkówki oka. Skupiono się na aspekcie wyznaczania z obrazu wejściowego obszaru zainteresowania zawierającego tarczę nerwu wzrokowego, a także na dalszej analizie otrzymanego fragmentu z wykorzystaniem konwolucyjnych sieci neuronowych. Stworzony klasyfikator jest w rzeczywistości złożeniem trzech sieci. Dodatkowo został zaimplementowany prosty interfejs konsolowy, umożliwiający korzystanie z aplikacji.
The purpose of this thesis was to create the software that will be able to automatically diagnose glaucoma based on retinal images. The thesis concerns the optic disc segmentation in the input image, as well as analysis of the obtained fragment with the use of convolution neural networks. The created classifier is actually example of ensemble of three networks. In addition, a simple command line interface has been implemented.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Inne
Tytuł:
Evolving ensembles of linear classifiers by means of clonal selection algorithm
Autorzy:
Bereta, M.
Burczyński, T.
Tematy:
artificial immune systems
clonal selection
linear classifiers
bagging
boosting
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Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Powiązania:
https://bibliotekanauki.pl/articles/969829.pdf  Link otwiera się w nowym oknie
Opis:
Artificial immune systems (AIS) have become popular among researchers and have been applied to a variety of tasks. Developing supervised learning algorithms based on metaphors from the immune system is still an area in which there is much to explore. In this paper a novel supervised immune algorithm based on clonal selection framework is proposed. It evolves a population of linear classifiers used to construct a set of classification rules. Aggregating strategies, such as bagging and boosting, are shown to work well with the proposed algorithm as the base classifier.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of Stability of Classical Taxonomy Bagging Metod with Bagging Based on Co-Occurence Data
Porównanie stabilności klasycznej taksonomicznej metody bagging z metodą bagging opartą na macierzy współwystąpień
Autorzy:
Rozmus, Dorota
Tematy:
Cluster analysis
Cluster ensemble
Stability
Bagging in taxonomy
Co-occurrence matrix.
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Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Powiązania:
https://bibliotekanauki.pl/articles/906849.pdf  Link otwiera się w nowym oknie
Opis:
Ensemble approach has been successfully applied in the context of supervised learning to increase the accuracy and stability of classification. Recently, analogous techniques for cluster analysis have been suggested in order to increase classification accuracy, robustness and stability of the clustering solutions. Research has proved that, by combining a collection of different clusterings, an improved solution can be obtained. The stability of a clustering algorithm with respect to small perturbations of data (e.g., data subsampling or small variations in the feature values) or the parameters of the algorithm (e.g., random initialization) is a desirable quality of the algorithm. On the other hand, ensembles benefit from diverse clusterers. Although built upon unstable components, the ensemble is expected to be more accurate and robust than the individual clustering method. Here, we look at the stability of the ensemble methods based on bagging idea and co-occurrence matrix. This paper carries out an experimental study to compare stability of bagging method used to the classical data set with bagging based on co-occurrence matrix.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of fruit baggings as preharvest treatments on the fruit quality of pineapple ‘MD-2’
Autorzy:
Lestari, Ria Rizky
Widodo, Soesiladi Esti
Waluyo, Sri
Tematy:
pineapple
bagging
polyethylene
paper
black shade net
ananas
pakowanie
polietylen
papier
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Wydawca:
Centrum Badań i Innowacji Pro-Akademia
Powiązania:
https://bibliotekanauki.pl/articles/58905768.pdf  Link otwiera się w nowym oknie
Opis:
The demand for fresh pineapple fruit is currently highest for the MD2 pineapple variety. Continuous efforts are made to enhance the quality of MD2 pineapples, including the fruit skin color, flesh color, sweetness, and minimizing sunburn damage. Bagging is one of the pre-harvest methods that can be employed for this purpose. This research aims to find suitable bagging materials that meet the industry's criteria and assess the severity of sunburn in each bagging treatment. A completely randomized design was used in this study, with six different bagging materials and pineapples aged 80 Days After Forcing (DAF). The bagging materials used were the control, blue Polyethylene (PE) bag, white PE bag, black paranet bag, paper bag, and the existing cap- shaped bagging technique using recycled paper from banana bagging, as utilized by PT. Great Giant Pineapple. Each treatment involved 120 pineapple samples harvested at 140 DAF. MD2 pineapples without bagging were found to provide the best results according to PT. Great Giant Pineapple's criteria, with green skin color (1.35%) and uniform yellow flesh (85.62%).
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Natural jute laminate for the improvement of strength properties of concrete specimen
Autorzy:
Zulfikar, Achmad Jusuf
Yaakob, Mohd Yuhazri
Umarfaruq, Hel Mee
Syah, Rahmad
Tematy:
natural fiber composite
jute fabric
compressive strength
splitting tensile strength
vacuum bagging.
Pokaż więcej
Wydawca:
Instytut Podstawowych Problemów Techniki PAN
Powiązania:
https://bibliotekanauki.pl/articles/38912467.pdf  Link otwiera się w nowym oknie
Opis:
In the last decade, the exploration and investigation of natural ingredients as alternative materials for metal substitutes have been continuously conducted to produce eco-friendly products with sufficiently good strength. The climate and geography of countries like Indonesia provide that such materials are available abundantly and can be easily replanted. Thus, these materials have considerable potential for application in various products. The purpose of this study is to analyze the compressive and tensile strength of a cylindrical column concrete structure reinforced externally with laminate composite materials derived from jute fabric sheets. The specimen manufacturing method uses a vacuum bagging technique with the specimen size specified in the ASTM C39 test standard. After manufacturing, the specimens underwent the treatment of immersion in clean water for 28 days, followed by drying at room temperature for additional 28 days. The column concrete specimens were wrapped with laminate composite materials with variations in several layers of jute fabric. Compressive strength and splitting tensile tests were conducted according to ASTM C39 and ASTM C496 test standards, respectively. The test results showed that applying laminate composite sheaths on the outer surface of the column concrete structure resulted in an increase in strength of up to 100% for both compressive strength and splitting tensile strength. The magnitude of such an increase in strength is reported in this article.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of selected supervised classification methods to bank marketing campaign
Autorzy:
Grzonka, D.
Borowik, B.
Suchacka, G.
Tematy:
classification
supervised learning
data mining
decision trees
bagging
boosting
random forests
bank marketing
R project
Pokaż więcej
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Powiązania:
https://bibliotekanauki.pl/articles/94739.pdf  Link otwiera się w nowym oknie
Opis:
Supervised classification covers a number of data mining methods based on training data. These methods have been successfully applied to solve multi-criteria complex classification problems in many domains, including economical issues. In this paper we discuss features of some supervised classification methods based on decision trees and apply them to the direct marketing campaigns data of a Portuguese banking institution. We discuss and compare the following classification methods: decision trees, bagging, boosting, and random forests. A classification problem in our approach is defined in a scenario where a bank’s clients make decisions about the activation of their deposits. The obtained results are used for evaluating the effectiveness of the classification rules.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Regression Model for the Bagging Fatigue of Knitted Fabrics Produced from Viscose/Polyester Blended Rotor Yarns
Model regresji dla oceny wypychania dzianin wykonanych z rotorowych przędz mieszankowych
Autorzy:
Hasani, H.
Hassan Zadeh, S.
Tematy:
trykot
struktura tkaniny
parcianka
eksperymentalne wzornictwo
mieszane przędze
knitted fabric
fabric structure
bagging
experimental design
blended yarns
Pokaż więcej
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Powiązania:
https://bibliotekanauki.pl/articles/232596.pdf  Link otwiera się w nowym oknie
Opis:
The aim of this work was to predict the bagging fatigue percentage of knitted fabrics produced from viscose/polyester blended rotor yarns using blend ratios and structural cell stitch lengths as predictor variables. A simplex lattice design was used to determine the combinations of blend ratios of the fibre types. Knitted fabrics with three different structures were produced from viscose/polyester blended rotor yarns. Mixture-process crossed regression models with two mixture components and one process variable (structural cell stitch lengths, blend ratio) were built to predict the bagging fatigue percentage. All statistical analysis steps were implemented using Design-Expert statistical software. The correlation coefficient between the bagging fatigue percentage predicted and the bagging fatigue percentage observed was 0.983, indicating the strong predictive capability of the regression model built.
Badano wypychanie dzianin wykonanych z wiskozowo-poliestrowych mieszankowych przędz rotorowych. Jako wielkości wejściowe przyjęto procentowy udział włókien w mieszankach splotu. Zastosowano konstrukcję sympleksu dla określenia kombinacji stosunku składników przędzy mieszankowej. Wyprodukowano trzy rodzaje dzianin przy użyciu rożnych mieszanek przędz, utworzono model regresji zawierający dwa składniki mieszanki i jedną zmienną procesu - długość splotu dziewiarskiego. Przeprowadzono analizę statystyczną przy wykorzystaniu programu Design-Expert. Uzyskano bardzo dobrą zgodność pomiędzy wartościami przewidywanymi i pomierzonymi, współczynnik korelacji wynosił 0.983.
Dostawca treści:
Biblioteka Nauki
Artykuł

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