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Wyszukujesz frazę "Markuszewski, T." wg kryterium: Autor


Wyświetlanie 1-8 z 8
Tytuł:
Optymalizacja formuł algorytmów przez wprowadzenie warunku
Algorithm formula optimization by the condition use
Autorzy:
Markuszewski, T.
Tematy:
algorytm
warunek
dekompozycja
uniterm
algebra algorytmów
optymalizacja formuł
algorithm
formula
condition
decomposition
uniterm function
formula optimization
Pokaż więcej
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:
https://bibliotekanauki.pl/articles/151208.pdf  Link otwiera się w nowym oknie
Opis:
W artykule przedstawiono budowę modelu podsystemu optymalizacji formuł algebry algorytmów metodą wprowadzenia dodatkowego warunku. Podsystem opisany został w postaci formuły algebry algorytmów. Przeprowadzono dekompozycje podsystemu na unitermy funkcyjne i zmienne. Opisano modele unitermów funkcyjnych i przedstawiono fragment implementacji podsystemu w języku C#.
The subsystem model designed for algorithm algebra formula optimization by the introducing the additional condition there is described in the paper. The theory description and the example of an application are shown in the section 2. Next the subsystem model decomposition into variables and functional uniterms, by the introducing the additional condition is realized. Variables are used for the storage of data needed for algorithm formula transformations. The construction of functional algorithms is described using algorithm algebra expressions. Functional algorithms perform the following tasks: initiate variables, set and release elements of the table retaining engaged conditions, and choose first free condition. The subsystem model contains functional uniterms used for the checking of the ability to transformation, as well as perform the optimization itself. The model allows to introduce the additional condition by two ways, automatically or manually. In automatic mode the system itself set variables, while in manual mode the user chooses conditions by the keyboard. The implementation of the subsystem model performing the optimization by the introducing the additional condition is shown in C # program language. In conclusions some advantages of the using of the algorithm formula optimization computer system are pointed out. Sources bounded with algorithm algebra are given in the bibliography.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Model systemu do przekształceń formuł algorytmów
The model of the system for algorithm formula transformations
Autorzy:
Markuszewski, T.
Tematy:
system
dekompozycja
podsystem
formuła
algorytm
model
decomposition
subsystem
formula
algorithm
Pokaż więcej
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:
https://bibliotekanauki.pl/articles/151233.pdf  Link otwiera się w nowym oknie
Opis:
W artykule przedstawiono budowę złożonego komputerowego systemu do przekształceń formuł algorytmów przy wykorzystaniu właściwości operacji algebry algorytmów. Budowany model systemu nazwano komputerowym systemem optymalizacji (KSO) i dokonano jego dekompozycji na dwóch poziomach, poziomie systemu i podsystemu. Na poziomie systemu w logiczny sposób wyodrębniono podsystemy pełniące oraz wspomagające zadania optymalizacji formuł algorytmów, a na poziomie podsystemu utworzono unitermy zmienne i funkcyjne. Dla opisania modelu systemu wykorzystano algebrę algorytmów. Fragment modelu systemu zaimplementowano w języku C#.
The model of algorithm algebra formulae optimization system is presented in the paper. The decomposition of the system into subsystems is performed using algebra algorithm expressions, and is described in terms of the expressions. The following algorithm algebra operation optimization subsystem models are formed: sequencing, elimination, parallelization, reversing, cycle operations, basic subsystem, subsystem introducing additional condition, subsystem rendering data accessible, and the one generating indices for xml code of algorithm formula. The basic subsystem model and the rendering data accessible one in the 3rd section there are described. Algorithm algebra expressions there are used consistently. Models are composed of variables and functional uniterms, which are also used by other subsystems. Variables are used for the data storage. Functional uniterms of the basic subsystem there are the following: extracting, substituting the xml code fragment, checking the separator kind in the uniterm, as well as the one checking if the uniterm is a number. Additionally there are included functional uniterms absorbing other uniterms, and the one informing on optimization process run. The basic and rendering data models are implemented in C# . In conclusions some advantages of both the algorithm formula optimization computer system and model decomposition into subsystem are given. Bibliography contains a set of intuitive and formal works describing the algorithms algebra.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lidar observation of aerosol transformation in the atmospheric boundary layer above the Baltic Sea
Autorzy:
Makuch, P.
Sitarek, S.
Markuszewski, P.
Petelski, T.
Stacewicz, T.
Tematy:
aerosol
sea spray
size distribution
aerosol optical property
boundary layer
lidar investigation
Baltic Sea
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Powiązania:
https://bibliotekanauki.pl/articles/2078926.pdf  Link otwiera się w nowym oknie
Opis:
Investigation results of a coarse and accumulation mode of aerosol properties above the Baltic Sea are reported. A most important role in the direct aerosol effect on climate have aerosols from the group of coarse and accumulation mode particles. Overseas in the atmosphere, there is a lot of aerosols from the fine fraction but their impact is not so important as coarse and accumulation mode particles. Sea spray emission from the sea surface takes place over a wide range of aerosol particle size distribution, it is also large in size range which are studying in this work (Lewis and Schwartz, 2004). The discussed range is most important in view of atmospheric optical properties, smaller particles do not have such an influence on scattering as particles from range 0.5—2 μm. The research was performed with a multiwavelength lidar. Due to the application of special software, the aerosol particle size distributions were retrieved from the lidar returns. That provided an opportunity to determine the profiles of the aerosol effective radius. We showed that the aerosol properties depend mainly on the direction of the air mass advection and the wind speed. The impact of the Baltic Sea on the aerosol size distribution is huge in the case of the advection from the open sea. Moreover, the aerosol effective radiuses in the whole boundary layer are much larger in the case of strong than for light wind. Our results suggest that the aerosol flux and the aerosol particle size distribution should be related to the wind speed in the emission function.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badanie wpływu wzajemnego ustawienia elementów endoprotez stawu biodrowego na wybrane parametry procesu tarcia
Testing of influence of mutual arrangement of hip endoprosthesis elements upon selected parameters of the friction process
Autorzy:
Sulej-Chojnacka, J.
Rybak, T.
Markuszewski, J.
Woźniak, W.
Tematy:
badania tarciowo-zużyciowe
endoproteza stawu biodrowego
hip simulator
friction-wear tests
hip endoprothesis
Pokaż więcej
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Obróbki Plastycznej
Powiązania:
https://bibliotekanauki.pl/articles/212055.pdf  Link otwiera się w nowym oknie
Opis:
Całkowita wymiana stawu biodrowego jest obecnie wysoce skuteczną i efektywną metodą przywracania funkcjonowania tego stawu. Podstawową cechą, która powinna cechować sztuczne stawy jest ich stabilność. W artykule opisano wyniki badań wpływu wzajemnego ustawienia elementów endoprotezy stawu biodrowego na wybrane parametry procesu tarcia. Badaniom poddano dwie pary trące o różnych średnicach, wykonane z różnych materiałów. Eksperyment wykonano na zaprojektowanym i zbudowanym w Instytucie Obróbki Plastycznej w Poznaniu symulatorze do badań elementów endoprotez stawu biodrowego SBT-01. Praca wykonana została we współpracy z Kliniką Ortopedii Ogólnej, Onkologicznej i Traumatologii na Uniwersytecie Medycznym im. Karola Marcinkowskiego w Poznaniu.
Total hip replacement is very effective method in case of human joint functionality restoring. The most important property of artificial joints is their functional stability. Results of influence of reciprocal endoprosthesis components setting on chosen friction parameters are presented. Two friction couples with different diameter made of different materials has been tested. Experiment has been performed using hip endoprosthesis simulator SBT-01 designed and constructed in Metal Forming Institute hip endoprosthesis simulator SBT-01. Work was carried out in cooperation with General Orthopaedics, Oncology and Traumatology Clinic at Karol Marcinkowski Poznan University of Medical Sciences.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Observations on relations between marine aerosol fluxes and surface-generated noise in the Southern Baltic Sea
Autorzy:
Markuszewski, P.
Klusek, Z.
Nilsson, E.D.
Petelski, T.
Tematy:
marine aerosol
aerosol flux
noise measurement
underwater noise
sea spray
hydroacoustic measurement
meteorological condition
Baltic Sea
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Powiązania:
https://bibliotekanauki.pl/articles/2079072.pdf  Link otwiera się w nowym oknie
Opis:
This study presents the preliminary results of combining underwater acoustic ambient noise measurements with those of in-situ sea spray fluxes (SSF). Hydroacoustic measurements (in the frequency range 80 Hz –12.5 kHz) were made using an underwater noise recording system developed at the Institute of Oceanology of the Polish Academy of Sciences which was then deployed in the southern Baltic Sea. The simultaneous measurements of coarse sea spray fluxes (with particle diameters ranging from 0.5 to 47 µm) were made on board the r/v Oceania using the gradient method. Observations were conducted for the duration of the passage of an atmospheric front that lasted 2.5 days (60 hours of measurements). There were significant differences in the sound pressure level (SPL) and aerosol fluxes observed between the first part of measurements (developing wave state) and the second part (developed waves). Wave parameters, such as peak period, significant wave height, wave age, and mean wave slope acquired from the WAM (WAve Model), were used to investigate the impact of wave field properties on noise and aerosol flux measurements. We observed different behaviours in the power spectrum density (PSD) levels of noise for these parameters depending on the wave state development.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aerosol physical properties in Spitsbergens fjords: Hornsund and Kongsfjorden during AREX campaigns in 2014 and 2015
Autorzy:
Markuszewski, P.
Rozwadowska, A.
Cisek, M.
Makuch, P.
Petelski, T.
Tematy:
Arctic aerosol
Spitsbergen
aerosol size
aerosol optical property
distribution
Hornsund
Kongsfjorden
meteorological condition
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Powiązania:
https://bibliotekanauki.pl/articles/47891.pdf  Link otwiera się w nowym oknie
Opis:
We present results of measurements of aerosol physical properties conducted on board of r/v Oceania during two cruises to the Spitsbergen region in 2014 (AREX 2014) and 2015 (AREX 2015). Measurements of aerosol size distribution, aerosol scattering coefficient and black carbon concentrations were made in two different Spitsbergen fjords: Hornsund and Kongsfjorden. The aerosol size distribution was measured in the size range from 0.09 μm to 47 μm using two aerosol size distribution spectrometers and a standard condensation particle counter. For the scattering coefficient an integrating nephelometer was used. Black carbon concentration was measured by an aethalometer. Temporal variabilities in physical properties of aerosol observed during the AREX 2014 and AREX 2015 campaigns were much higher than the differences between both fjords. The basic factors influencing aerosol conditions were advection and local generation of marine aerosol. In 2015 an episode of smoke advection was observed in both fjords causing an increase in the mean black carbon concentration from 7–12 ng m−3 to about 60 ng m−3, and an aerosol scattering coefficient at 550 nm from 2–4 Mm−1 to 12–17 Mm−1. Moreover, under certain conditions statistically significant gradients in aerosol optical properties were observed along the fjord axis reflecting an impact of mountains surrounding the fjords.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aerosol Optical Depth variations due to local breeze circulation in Kongsfjorden, Spitsbergen
Autorzy:
Cisek, M.
Petelski, T.
Zielinski, T.
Makuch, P.
Pakszys, P.
Rozwadowska, A.
Markuszewski, P.
Tematy:
aerosol optical depth
aerosol
modification
Arctic region
Kongsfjorden
breeze circulation
wind speed
Spitsbergen
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Powiązania:
https://bibliotekanauki.pl/articles/47662.pdf  Link otwiera się w nowym oknie
Opis:
This paper presents the results of Aerosol Optical Depth (AOD) studies which took place in Ny-Ålesund in the spring of 2014 during the iAREA campaign. The measurements were taken using Microtops II hand-held sunphotometers along the Kongsfjorden, on a path leading from the research village to the fjord opening. Local breeze circulation was observed during the measurement campaign which resulted in an evident increase of AOD along the measurement profile towards the open sea. Using the observed AOD, changes over the open sea have been calculated and the location of the breeze front has been determined.
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-8 z 8

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