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Tytuł:
Pilot subjective decisions in aircraft active control system
Subiektywne decyzje pilota w aktywnym układzie sterowania samolotu
Autorzy:
Rohacs, J.
Kasyanov, V. A.
Powiązania:
https://bibliotekanauki.pl/articles/280939.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
active control system
endogenous system
subjective analysis
Opis:
The aircraft conventional control systems including pilot-operators in loop are called as active endogenous systems, because the pilots react actively to real situations evaluated by them and their solutions origin from their minds, from the nervous system. The pilots must make decisions in situations characterised by lack of information, human robust behaviour and their individual capabilities. So, decisions born from reactions of pilot are an effect of subjective analysis. This paper investigates the aircraft landing. The subjective factor is the ratio of required and available time to decision on the go around. The decision depends on the available information and psycho-physiological condition of operator pilots and can be determined with the use of theory of statistical hypotheses. This paper introduces a modified Lorenz attractor for the modelling of the endogenous dynamics of the given active system.
Konwencjonalne układy sterowania samolotem, włączając w to rolę pilotów, nazywane są aktywnymi układami endogennymi z racji znaczenia bieżącej oceny sytuacji i reakcji pilotów wynikających z ich świadomości i cech układu nerwowego. Piloci muszą podejmować decyzje w warunkach braku pełnej informacji o parametrach lotu, posiadając przy tym swoiste cechy reaktywnych zachowań i własny zestaw wytrenowanych nawyków. W ten sposób analiza właściwości monitorowania samolotu staje się badaniem układu zawierającego zmienne subiektywne. W pracy zbadano problem podejścia do lądowania. Za czynnik subiektywny wzięto stosunek czasu wymaganego do faktycznie posiadanego przed podjęciem decyzji o możliwej rezygnacji z lądowania. Decyzja ta zależy od ilości zgromadzonych informacji w danej chwili oraz kondycji psycho-fizjologicznej pilotów i została opisana za pomocą hipotez statystycznych. Do zamodelowania dynamiki rozważanego endogennego układu sterowania samolotem użyto zmodyfikowanego atraktora Lorentza.
Źródło:
Journal of Theoretical and Applied Mechanics; 2011, 49, 1; 175-186
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comprehensive approach to the inventory control system improvement
Autorzy:
Krajčovič, M.
Plinta, D.
Powiązania:
https://bibliotekanauki.pl/articles/407413.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
inventory control system
inventory analysis
ABC/XYZ analysis
Opis:
This paper describes a methodology for inventory analysis and reduction, which was developed at the Department of Industrial Engineering, Faculty of Mechanical Engineering, University of Zilina. The methodology describes the optimal procedure for the application of basic analytical methods and tools in practice. The results of the analysis are in the algorithm linked to the subsequent actions realized to improve inventory management system and to minimize inventory level in the company. Described procedure is the result of methodology examination and verification in practical conditions of production enterprises. In the following sections of this paper, there are presented a comprehensive approach to the inventory analysis and the own algorithm, which contains 3 phases: inventory analysis on enterprise level, summary analysis of individual item groups and individual analysis of material items. In the last section, there are described examples of results from such analysis and conclusions. The presented approach is an attempt to create a universal procedure of analysis which integrates methods and tools described in various publications.
Źródło:
Management and Production Engineering Review; 2012, 3, 3; 34-44
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative analysis of multi-criteria decision making methods for the assessment of optimal SVC location
Autorzy:
Aydin, Faruk
Gümüş, Bilal
Powiązania:
https://bibliotekanauki.pl/articles/2173650.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Borda count method
FACTS
MCDM
optimal location
PSAT
voltage stability
flexible alternating current transmission system
power system analysis toolbox
multi criteria decision making
metoda liczenia Bordy
podejmowanie decyzji wielokryterialnej
lokalizacja optymalna
stabilność napięcia
elastyczne systemy przesyłowe prądu przemiennego
narzędzia do analizy systemu zasilania
Opis:
The goal of multi-criteria decision making (MCDM) is to select the most appropriate of the alternatives by evaluating many conflicting criteria together. MCDM methods are widely available in the literature and have been used in various energy problems. The key problems studied in electrical power systems in recent years have included voltage instability and voltage collapse. Different flexible alternating current transmission systems (FACTS) equipment has been used for this purpose for decades, increasing voltage stability while enhancing system efficiency, reliability and quality of supply, and offering environmental benefits. Finding the best locations for these devices in terms of voltage stability in actual electrical networks poses a serious problem. Many criteria should be considered when determining the most suitable location for the controller. The aim of this paper is to provide a comparative analysis of MCDM techniques to be used for optimal location of a static VAR compensator (SVC) device in terms of voltage stability. The ideal location can be determined by means of sorting according to priority criteria. The proposed approach was carried out using the Power System Analysis Toolbox (PSAT) in MATLAB in the IEEE 14-bus test system. Using ten different MCDM methods, the most appropriate locations were compared among themselves and a single ranking list was obtained, integrated with the Borda count method, which is a data fusion technique. The application results showed that the methods used are consistent among themselves. It was revealed that the integrated model was an appropriate method that could be used for optimal location selection, providing reliable and satisfactory results to power system planners.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 2; art. no. e140555
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative analysis of American and Russian political discourse: A discourse analysis study
Autorzy:
Kopik, Monika
Powiązania:
https://bibliotekanauki.pl/articles/40221009.pdf
Data publikacji:
2023
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II
Tematy:
discourse
political discourse
discourse analysis
American political system
Russian political system
comparative analysis
Opis:
This article provides an exhaustive analysis of American and Russian political discourse through the examination of the linguistic techniques employed by President Joe Biden and President Putin in their speeches. The aim of this research is to examine the linguistic approaches employed in referencing social and political traditions in the United States and Russia, investigate disparities in linguistic strategies within both political discourses, and assess variations in semantic outcomes. The analysis has been conducted to answer the following research questions: (1) What are the linguistic methods of referring to social and political traditions in America and Russia? (2) Do the linguistic strategies differ depending on the political discourse? (3) Is the semantic output different depending on the political discourse? The findings reveal marked differences between the two discourses, reflecting the social and political discrepancies between the political systems of the United States and Russia.
Źródło:
Linguistics Beyond and Within; 2023, 9; 49-59
2450-5188
Pojawia się w:
Linguistics Beyond and Within
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza obciążenia pracą dojarzy w fermie krów mlecznych
Analysis of milkers work load in milk cow farm
Autorzy:
Kiełbasa, P.
Budyn, P.
Kuciakowski, R.
Powiązania:
https://bibliotekanauki.pl/articles/289912.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
ergonomia
praca statyczna
dój
krowa
metoda OWAS
Ovako Working Posture Analysis System
ergonomics
static work
cow
milking process
OWAS method
Opis:
Podstawowa część obciążeń typu statycznego związana jest z napięciami posturalnymi odgrywającymi rolę w utrzymaniu pożądanej pozycji ciała. Celem badań była analiza obciążenia pracą dojarzy podczas doju krów. Analizę obciążenia pracą badanych osób przeprowadzono metodą OWAS - Ovako Working Posture Analysis System, służącą do oceny wielkości obciążenia statycznego. Przebadano dojarzy pracujących na hali udojowej typu "rybia ość". Materiał badawczy do oceny obciążeń pracą dojarzy pozyskano sposobem rejestracji kamerą cyfrową przy prędkości 25 ekspozycji na sekundę. Zaobserwowano, że większość czynności w analizowanym procesie doju generuje małe obciążenia pracą statyczną dojarzy.
Basic part of static loads is related to postural tensions which play their role in keeping desired body position. The purpose of the research was to analyse milkers' work load during cow milking. The analysis of work load for examined persons was carried out using the OWAS method - Ovako Working Posture Analysis System, used to assess static load size. The examination was carried out for milkers working in a "fish bone"-type milking room. The research material for the assessment of milkers' work load was acquired by means of digital camera recording at the rate of 25 exposures per second. It has been observed that most of operations in the analysed milking process generates small static work loads for milkers.
Źródło:
Inżynieria Rolnicza; 2008, R. 12, nr 11(109), 11(109); 121-126
1429-7264
Pojawia się w:
Inżynieria Rolnicza
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis and evaluation of application of car modular systems in polish road transport
Autorzy:
Muślewski, Ł.
Lewalski, M.
Woropay, M.
Powiązania:
https://bibliotekanauki.pl/articles/246606.pdf
Data publikacji:
2015
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport system
car modular system
SWOT analysis
efficiency
Opis:
This study presents an analysis and evaluation of application of European Car Modular Systems in the Polish road transport. Those systems and respective terminology have been analysed and classified. Application of such systems in other countries of the European Union has been described. SWAT analysis has also been carried out in order to enable the most optimal choice of modular system in freight transport to match the condition and characteristics of the Polish road infrastructure. The systems have also been analysed in terms of efficiency and the analysis was performed on the basis of a selected research object – a transport company. An analysis of costs and estimated profits from transport services to be provided by those systems has been carried out on the basis of the research object in comparison with costs borne by the considered company with currently used transport means. This study shows that taking into consideration the results of analyses, safety aspect, road infrastructure and energy efficiency of the vehicles it was found that the proposed oversized vehicles could be implemented to be used on the Polish roads. The analyses and tests performed for a transport logistic company discussed in this article have demonstrated that the proposed modular systems will undoubtedly allow reducing significantly the costs of transport services by increasing load capacity of vehicles.
Źródło:
Journal of KONES; 2015, 22, 4; 211-220
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Model systemu sygnalizacji włamania i napadu na bazie czujników akustycznych
Method of analysis of objects security system effectiveness
Autorzy:
Król, H.
Paś, J.
Powiązania:
https://bibliotekanauki.pl/articles/208625.pdf
Data publikacji:
2011
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
system bezpieczeństwa
skuteczność
analiza
security system
effectiveness
analysis
Opis:
Przedstawiono zjawiska zachodzące przy niszczeniu szyb o różnych wymiarach. Przeanalizowano właściwości ogólnie dostępnych na rynku czujników zbicia szkła. Zaproponowano i przebadano model systemu sygnalizacji włamania i napadu zbudowany na bazie czujników akustycznych.
Glass break acoustic phenomenon during destroying window-panes of different size was investigated. Proprieties of available on the market glass break sensors were analysed. Burglary and assault signalling system based on acoustic sensors was examined and proposed.
Źródło:
Biuletyn Wojskowej Akademii Technicznej; 2011, 60, 1; 127-146
1234-5865
Pojawia się w:
Biuletyn Wojskowej Akademii Technicznej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sensitivity analysis of a fuzzy expert system for modelling dependencies in human operators’ emergency tasks
Autorzy:
Zio, E.
Baraldi, P.
Librizzi, M.
Podofillini, L.
Dang, H. V.
Powiązania:
https://bibliotekanauki.pl/articles/2069589.pdf
Data publikacji:
2007
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
human reliability analysis
fuzzy expert system
sensitivity analysis
Opis:
This paper analyzes the behaviour of a fuzzy expert system for evaluating the dependence among successive operator actions, through a sensitivity analysis on the fuzzy input partitioning and assessment. Preliminary results are presented with respect to a case study concerning two successive tasks of an emergency procedure in a nuclear reactor. Work is in progress to perform a thorough sensitivity analysis to generalize the results obtained.
Źródło:
Journal of Polish Safety and Reliability Association; 2007, 2; 379--389
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comperative study on managers’ assessment of the selected properties of internal reports
Autorzy:
Dobroszek, Justyna
Zarzycka, Ewelina
Almasan, Alina
Circa, Cristina
Powiązania:
https://bibliotekanauki.pl/articles/947792.pdf
Data publikacji:
2018
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
management information system
management accounting system
system
managers
cluster analysis
Opis:
An important role in an organization is played by the management information system that enables managers to perform management tasks. The pillar of this system is financial and non-financial data provided by the management accounting system. The effect of the application of specific management accounting tools are various types of studies and analyses, defined in internal reports, which are the basis for management, and thus making decisions by managers. Internal reports, in order to fulfil their functions effectively, must have appropriate features as to its structure, content and other properties. In connection with this, the authors studied and presented an assessment of managers from Poland and Romania in the context of such properties of internal reports as quality, content, presentation and comments. The survey method was used as the research method, while the analysis of collected research material was based on cluster analysis and descriptive statistics. The sample consisted of 154 questionnaires. The findings are similar in both countries, although in the case of Romania, managers who assessed highly the quality and content of internal reports, and evaluated slightly lower the presentations and comments.
Źródło:
Financial Sciences. Nauki o Finansach; 2018, 23, 3; 46-60
2080-5993
2449-9811
Pojawia się w:
Financial Sciences. Nauki o Finansach
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling and analysis of beam/bar structure by application of bond graphs
Modelowanie i analiza konstrukcji belkowo-prętowych z zastosowaniem grafów wiązań
Autorzy:
Orlikowski, C.
Hein, R.
Powiązania:
https://bibliotekanauki.pl/articles/279348.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
mechanical system
modelling
modal analysis
Opis:
The paper presents a uniform, port-based approach to modelling of beam/bar systems (trusses). The port-based model of such a distributed parameter system has been defined by application of the bond graph methodology and the distributed transfer function method (DTFM). The proposed method of modelling enables one to formulate input data for computer analysis by application of the DTFM. The constructed computational package enables frequency domain analysis. Additionally, the presented approach uses DTFM to obtain a modal reduced model of the considered system in the form of modal bond graph. The presented algorithm in a simply way allows one to obtain a modal reduced model of complex distributed-lumped parameter beam/bar systems.
W pracy przedstawiono jednolity sposób modelowania konstrukcji belkowo-prętowych (kratownice). Model rozważanego systemu o parametrach rozłożonych został opracowany przy zastosowaniu metodologii grafów wiązań i metody transmitancji układów o parametrach rozłożonych (DTFM). Proponowana metoda modelowania pozwala sformułować wygodny algorytm do analizy komputerowej z zastosowaniem DTFM. Opracowany system obliczeniowy umożliwia analizę w dziedzinie częstotliwości oraz otrzymanie zredukowanego modelu modalnego rozważanego układu w postaci modalnego grafu wiązań. Prezentowany algorytm w prosty sposób pozwala na uzyskanie zredukowanego modelu modalnego złożonych, dyskretno-ciągłych układów belkowo-prętowych.
Źródło:
Journal of Theoretical and Applied Mechanics; 2011, 49, 4; 1003-1017
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Audit versus development in a certified quality management system
Audit a rozwój w certyfikowanym systemie zarządzania jakością
Autorzy:
Ligarski, M. J.
Powiązania:
https://bibliotekanauki.pl/articles/112614.pdf
Data publikacji:
2012
Wydawca:
STE GROUP
Tematy:
analiza
system zarządzania jakością
analysis
quality management system
Opis:
Analiza na potrzeby niniejszej pracy została przeprowadzona na dwóch typach auditów certyfikowanego systemu zarządzania jakością w kontekście pozyskania i przetworzenia informacji dotyczących rozwoju. Wskazano cele i etapy szeroko rozumianego procesu auditowania oraz wymieniono czynniki wpływające na wskazania rozwojowe system. Określono również wpływ organizacji na poszczególne etapy procesu auditowania. Szczególną uwagę poświęcono typom informacji dotyczących rozwoju, które są pozyskiwane w obu typach auditów. Wskazano również centra odpowiedzialności za pozyskanie i użycie informacji. Podjęto próbę odpowiedzi na pytanie, dotyczące źródeł problemów i przyczyn ich występowania.
Źródło:
Systemy Wspomagania w Inżynierii Produkcji; 2012, 1 (1); 124-132
2391-9361
Pojawia się w:
Systemy Wspomagania w Inżynierii Produkcji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metoda analizy skuteczności systemu bezpieczeństwa obiektu
Method of analysis of objects security system effectiveness
Autorzy:
Szulim, M.
Kuchta, M.
Powiązania:
https://bibliotekanauki.pl/articles/211178.pdf
Data publikacji:
2010
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
system bezpieczeństwa
skuteczność
analiza
security system
effectiveness
analysis
Opis:
Przedstawiono metodę analizy skuteczności systemu bezpieczeństwa przykładowego obiektu bazującą na ilościowej ocenie skuteczności - wyrażoną współczynnikiem skuteczności przedstawiającym prawdopodobieństwo neutralizacji zagrożeń przestępczych w chronionym obiekcie.
The method of analysis that allows for quantitative evaluation of security system effectiveness was shown. This evaluation is based on the effectiveness coefficient which represents the probability of criminal risk neutralization for an object.
Źródło:
Biuletyn Wojskowej Akademii Technicznej; 2010, 59, 4; 111-121
1234-5865
Pojawia się w:
Biuletyn Wojskowej Akademii Technicznej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przemiany polskiego systemu edukacji podstawowej od lat 80. XX wieku
Transformations of the Polish Basic Education System Since the 1980s XX Century
Autorzy:
SZCZEPANEK, MAGDALENA
Powiązania:
https://bibliotekanauki.pl/articles/455846.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Rzeszowski
Tematy:
system oświatowy
system szkolny
analiza komparatystyczna
educational system
school system
comparative analysis
Opis:
Artykuł zawiera opis reform i zmian w systemie edukacji od lat 80. XX w. do 2017 r. Opisuję w nim reformy w systemie związane z przemianami społecznymi po 1980 r., które trwały niespełna 20 lat. Również podejmuję się przedstawienia planu zmian w szkolnictwie, które weszły w życie we wrześniu 2017 r., a głównie dotyczyły struktury szkolnictwa podstawowego.
The article contains a description of reforms and changes in the education system from the 1980s to 2017. I describe in it system reforms related to social changes after 1980, which lasted less than 20 years. I am also undertaking a presentation of a plan of changes in education that came into force in September 2017, and their main assumption was changes in the structure of primary education.
Źródło:
Edukacja-Technika-Informatyka; 2018, 9, 4; 524-528
2080-9069
Pojawia się w:
Edukacja-Technika-Informatyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Operating system efficiency evaluation on the base of measurements analysis with the use of non-extensive statistics elements
Autorzy:
Dymora, P.
Mazurek, M.
Żelazny, K.
Powiązania:
https://bibliotekanauki.pl/articles/106188.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
Linux
operating system
efficiency
statistical analysis
self-similarity analysis
multifractal analysis
Opis:
The major goal of this article was to evaluate the efficiency of Linux operating system using statistical self-similarity and multifractal analysis. In order to collect the necessary data, thetools available in Linux such as vmstat, top and iostat were used. The measurement data collected witht hose tools had to be converted into a format acceptable by applications which analyze statistical selfsimilarity and multifractal spectra. Measurements collected while using the MySQL database systemin a host operating system were therefore analyzed with the use of statistical self-similarity and allowedto determine the occurrence of long-range dependencies. Those dependencies were analyzed with theuse of adequately graduated diagrams. Multifractal analysis was conducted with the help of FracLab application. Two methods were applied to determine the multifractal spectra. The obtained spectra were analyzed in order to establish the multifractal dependencies.
Źródło:
Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica; 2014, 14, 3; 65-75
1732-1360
2083-3628
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Expert systems as a tool supporting the assessment of the financial condition of business units
Autorzy:
Olszewska, Kinga
Powiązania:
https://bibliotekanauki.pl/articles/1075627.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
IT management systems
expert system
financial analysis
index analysis
Opis:
The ubiquitousness of information systems means that more and more areas of the company's activity are moving into the virtual sphere. IT systems take over most of the complicated tasks performed by people, which has a positive impact on time and costs incurred for the implementation of these tasks. One of the areas in which IT systems are used is the area of financial management, and thus the management of the financial condition of the unit. This article aims to test the suitability of expert systems as tools that can support the analysis and assessment of the financial condition of business units. The theoretical part discusses the essence of IT systems, theoretical foundations of expert systems and their advantages and disadvantages. The research part shows the use of an expert system to conduct the analysis of the financial condition of selected enterprises based on data from the financial statements of these units from 2015. The expert system provided information on the financial condition of selected companies. These results were compared with the results of the analysis carried out in the traditional way. This confirmed the author's assumption that it is possible to replace the financial analysis carried out with traditional methods by using a properly prepared expert system.
Źródło:
World Scientific News; 2019, 125; 114-126
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Group technology in context of the product classification
Autorzy:
Debnárová, L
Krchová, D
Kuric, I.
Powiązania:
https://bibliotekanauki.pl/articles/102868.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
group technology
classification system
coding system
cellular manufacturing
product analysis
cluster analysis
segmentation
capacity planning
Opis:
In the intensive competitive environment of the global economy, the survival of even the most well-established the world manufacturers depends on the ability to improve continuously quality while reducing costs. The resulting higher productivity is the key to market leadership and gaining sustainable competitive advantage. This paper outlines a group technology and classification of products which improve productivity, quality, inventory management of a company and reduce production times.
Źródło:
Advances in Science and Technology. Research Journal; 2014, 8, 21; 78-81
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Static stability analysis of power systems
Autorzy:
Konoval, V.
Prytula, R.
Skrypnyk, O.
Powiązania:
https://bibliotekanauki.pl/articles/376128.pdf
Data publikacji:
2015
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
static stability
power system
modal analysis
Opis:
The developed modal method for analyzing oscillating static stability of power systems is based on eigenvalues and eigenvectors. As a mathematical model to the study we use a system of linearized differential equations that describe the behaviour of synchronous machines and their excitation systems during minor disturbances. This approach allows us to analyse the static stability of large power systems, evaluate stability margins, degree of damping modes, and set adjustment mechanism for mode parameters to improve mode stability. We investigated the impact of generator excitation system replacement on stability of Ukraine’s power system. The suggested modal analysis is implemented in the DAKAR software suite [1].
Źródło:
Poznan University of Technology Academic Journals. Electrical Engineering; 2015, 82; 11-19
1897-0737
Pojawia się w:
Poznan University of Technology Academic Journals. Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synchronization of two forced double-well Duffing oscillators with attached pendulums
Autorzy:
Brzeski, P.
Karmazyn, A.
Perlikowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/280968.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
Duffing pendulum system
bifurcational analysis
synchronization
Opis:
We investigate the dynamics of two coupled Duffing oscillators with attached pendulums forced kinematically by a common signal. Our attention is focused on different kinds of synchronization which can appear in the considered system. Different types of coupling (spring, damper and spring and damper simultaneously) are taken into account. We show in a two-parameters space (amplitude and frequency of excitation) existence of complete and phase synchronization and asynchronous ranges.
Źródło:
Journal of Theoretical and Applied Mechanics; 2013, 51, 3; 603-613
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Systemic Analysis of Politics in the Light of Reconstruction of Structural Functionalism of Jeffrey C. Alexander
Autorzy:
Nocoń, Jarosław
Powiązania:
https://bibliotekanauki.pl/articles/2020077.pdf
Data publikacji:
2021-09-30
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
political system
political analysis
functional explanation
Opis:
Applying systems analysis in political science research is still one of the important dimensions of political science methodology. Reconstruction of the functional model of the social system seems to be an attractive proposition for policy researchers. Signed by the name of Jeffrey Charles Alexander, the American version of neofunctionalism is one of the responses to the crisis of traditional forms of structural functionalism. The main purpose of the reconstruction of T. Parsons’s theory was its revitalization consisting in restoring the possibility of its application in contemporary social research. The reinterpretation of the classical approach was to a large extent “forced” by harsh criticism of the current approach and focused especially on attempts to overcome the limitations contained therein, which manifested in the impossibility of correlation of functional theorems with newly developing research currents Jeffrey Alexander restored relevance and emphasizes suitability for interpreting and explaining political processes and phenomena. Understanding the concept of functions and functional relations in the political environment allows for effective application in the analysis of contemporary political systems. Therefore, changing the method of functional analysis is a useful methodological tool in developing a political theory.
Źródło:
Polish Political Science Yearbook; 2021, 3 (50); 7-20
0208-7375
Pojawia się w:
Polish Political Science Yearbook
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Smart Cooling Controlled System Exploiting Photovoltaic Renewable Energy Systems
Autorzy:
Atieh, A.
Al Asfar, J.
Tawalbeh, N.
Shaqour, E.
Alsalhi, I.
Istaiteh, O.
Powiązania:
https://bibliotekanauki.pl/articles/123359.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
smart cooling system
solar system
energy management
cost analysis
Opis:
A smart cooling system to control the ambient temperature of a premise in Amman, Jordan, is investigated and implemented. The premise holds 650 people and has 14 air conditioners with the cooling capacity ranging from 3 to 5 ton refrigerant (TR) each. The control of the cooling system includes implementing different electronics circuits that are used to sense the ambient temperature and humidity, count the number of people in the premise and then turn ON/OFF certain air conditioner(s). The data collected by different electronic circuits are fed wirelessly to a microcontroller, which decides which air conditioner will be turned ON/OFF, its location and its desired set cooling temperature. The cooling system is integrated with an on-grid solar photovoltaic energy system to minimize the operational cost of the overall cooling system.
Źródło:
Journal of Ecological Engineering; 2018, 19, 2; 39-44
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance evaluation on selection of formwork systems in high rise buildings using regression analysis and their impacts on project success
Autorzy:
Rajeshkumar, Viswanathan
Sreevidya, V.
Powiązania:
https://bibliotekanauki.pl/articles/962264.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
deskowanie
system deskowania
analiza czynnikowa
korelacja
analiza regresji
formwork system
factor analysis
correlation
regression analysis
Opis:
The selection of the formwork system for high rise building affects the entire construction project duration and cost. The study reports the factors influencing the selection of different formwork system in the construction of high rise buildings through structural questionnaire survey from the client, contractor, consultant, and interviews with expert members. Total of 40 technical factors was identified from the literature and 220 filled questionnaires were received from the respondent. Relative Importance Index method is used to find the topmost factors affecting the selection of formwork system. Additionally, from factor analysis 22 factors were identified to have a correlation with one another. Regression analysis reveals that duration of the project, maintenance cost, adaptability, and safety have impact on formwork selection across time, cost and quality. These findings could potentially increase the construction company’s existing knowledge in relation to formwork selection.
Źródło:
Archives of Civil Engineering; 2019, 65, 2; 209-222
1230-2945
Pojawia się w:
Archives of Civil Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of risk and failure scenarios in water supply system
Autorzy:
Boryczko, K.
Rak, J.
Tchórzewska-Cieślak, B.
Powiązania:
https://bibliotekanauki.pl/articles/2069508.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
fault tree analysis
matrix methods
risk analysis
water supply system
Opis:
Water supply system is complicated technical system which belongs to underground urban infrastructure. Its accurate functioning determines everyday live stability of citizens. Risk analysis is a key phase of the process of water supply safety management. The aim of this paper is to present new propose of methods for risk of the first type (associated with quantity of supplied water) and the risk of the second type (associated with quality of supplied water) analyses in water supply system. The paper contains the description of matrix methods for risk analyses and methods describing cause-and-effect relationship of failure events (fault tree analysis).
Źródło:
Journal of Polish Safety and Reliability Association; 2014, 5, 2; 11--18
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
O problemach w kwalifikacji zdolności systemów pomiarowych w badaniach chropowatości powierzchni, analiza na przykładzie precyzyjnych części w branży motoryzacyjnej
The problems in in the qualification of measuring systems abilities in the investigation performance, the analysis on the example of precision workpieces in the automotive industry
Autorzy:
Garbaciak, M.
Bachtiak-Radka, E.
Dudzińska, S.
Grochała, D.
Powiązania:
https://bibliotekanauki.pl/articles/312919.pdf
Data publikacji:
2018
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
analiza zdolności systemów pomiarowych
system pomiarowy
błędy pomiarowe
chropowatość powierzchni
branża motoryzacyjna
analysis of measurement system capabilities
measurement system
measurement errors
surface roughness
automotive industry
Opis:
W artykule omówione zostały problemy w kwalifikacji zdolności systemów pomiarowych w badaniach chropowatości powierzchni precyzyjnych części w branży motoryzacyjnej. Badania przeprowadzono zgodnie z planem pomiarów. Następnie w oparciu o zebrane wyniki dla wybranych parametrów SPG wykonano analizę i ocenę wskaźników zdolności zgodnie z procedurą 2 statystycznej kwalifikacji systemów pomiarowych (zgodne z normą MSA 2010 edycja 4, ARM, tolerancja). Analizie poddano dwa wyroby fragment cylindra i labiryntowych zaworów automatycznych skrzyń biegów. Analiza dała szereg informacji dotyczących błędów z punktu widzenia powtarzalności i odtwarzalności na zdolność systemu pomiarowego – analizy zostały wykonane na potrzeby płynące z przemysłu.
The manuscript introduce the problems in the qualification of measuring systems abilities in the investigation in the surface roughness of precision workpieces in the automotive industry. The research were carried out in accordance with the measurement plan. Next, based on the collected results for selected SPG parameters, the analysis and assessment of the capacity indicators were carried out in accordance with the procedure 2 of statistical qualification of measurement systems (in accordance with the MSA 2010 standard edition 4, ARM, tolerance). Two products were analyzed of the cylinder fragment and labyrinth valves of automatic gearboxes. The analysis gave a series of information on errors from the point of view of reproducibility and recurrence on the ability of the measurement system - the analyzes were carried out for the needs of the automotive industry.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2018, 19, 9; 147-151
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
MEASUREMENT OF HEALTHCARE SYSTEM EFFICIENCY IN OECD COUNTRIES
Autorzy:
Kujawska, Justyna
Powiązania:
https://bibliotekanauki.pl/articles/452740.pdf
Data publikacji:
2015
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
Tematy:
healthcare system efficiency
Data Envelopment Analysis
Opis:
Increased spending on healthcare systems in many countries tends to attract attention to their efficiency. The aim of this paper is to evaluate the efficiency of healthcare systems in the OECD countries and indicate causes of inefficiency by applying Data Envelopment Analysis (DEA) and using additive and super-efficiency models. The homogeneity of the sample is assessed and outliers are excluded. A ranking is established on the basis of efficiency scores. By means of DEA, fully efficient units are identified, forming a reference set (of best practice) for inefficient countries to follow.
Źródło:
Metody Ilościowe w Badaniach Ekonomicznych; 2015, 16, 2; 23-32
2082-792X
Pojawia się w:
Metody Ilościowe w Badaniach Ekonomicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Concept of expert system interpreting correctness of measurement and method of the EEG signal analysis for needs of the brain-computer interface
Autorzy:
Paszkiel, S.
Powiązania:
https://bibliotekanauki.pl/articles/378126.pdf
Data publikacji:
2016
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
EEG signal
expert system
data analysis
Opis:
The concept of construction of the expert system interpreting correctness of measurement and the method of the EEG signal analysis for needs of the brain-computer interface (BCI) are described in the article. The general orientations related with the methodology of creating the expert systems based on the knowledge base (KB) are characterised. Also, the brain-computer interface technology was described, which has been recently gaining more and more popularity within the scope of its application in control processes.
Źródło:
Poznan University of Technology Academic Journals. Electrical Engineering; 2016, 88; 209-216
1897-0737
Pojawia się w:
Poznan University of Technology Academic Journals. Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sensitivity Analysis and Optimization for Selected Supply Chain Management Issues in the Company – Using System Dynamics and Vensim
Autorzy:
Kasperska, Elżbieta
Mateja-Losa, Elwira
Marjasz, Rafał
Powiązania:
https://bibliotekanauki.pl/articles/475034.pdf
Data publikacji:
2013
Wydawca:
Fundacja Upowszechniająca Wiedzę i Naukę Cognitione
Tematy:
System Dynamics
sensitivity analysis
optimization
Vensim
Opis:
The aim of our paper is to present the new results of research work on optimization and simulation for some logistic problems in the company. The System Dynamics (SD) method and the Vensim simulation language are applied in order to solve specific managerial problems described by Forrester in the model of supply chain. The historical model of Customer-Producer-Employment System by Forrester (Forrester, 1961) has not been examined with the sensitivity analysis, from the “automatic” testing perspective. Optimization experiments have not been conducted, either. It is surprising, since the model is old and widely known. The opportunities offered by the Vensim language allow us to perform such analysis. The visualization called “confidence bounds“ is used, to show the behaviour of chosen variables over a period of time. The Monte-Carlo method is applied for sampling a set of numbers from within bounded domains (distribution for each searching parameters is specified). The authors of this paper conducted numerous experiments in this scope. This paper presents their results and offers some conclusions formulated at the end.
Źródło:
Journal of Entrepreneurship, Management and Innovation; 2013, 9, 2; 29-44
2299-7075
2299-7326
Pojawia się w:
Journal of Entrepreneurship, Management and Innovation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Factor Analysis as a Means of Filtering Rams Indicators for Railway Vehicles
Autorzy:
Sitarz, Marek
Chruzik, Katarzyna
Graboń-Chałupczak, Marzena
Powiązania:
https://bibliotekanauki.pl/articles/503756.pdf
Data publikacji:
2017
Wydawca:
Międzynarodowa Wyższa Szkoła Logistyki i Transportu
Tematy:
Maintenance Management System RAMS
factor analysis
Opis:
European Commission Regulation (EU) No. 445/2011 regarding the system of certification for entities in charge of maintenance (ECM) of freight wagons requires such entities to supervise the condition of wagons, without specifying the methods of supervision to be used. Each ECM should establish a Maintenance Management System (MMS), which will include the obligation to monitor the fleet of freight wagons. Monitoring railway vehicle maintenance operations should include tracking all significant technical and operational indicators. The key question is which indicators are the have the greatest impact on safety. This paper discusses some issues related to the monitoring of maintenance operations for railway vehicles. It also looks at dedicated solutions for entities in charge of the maintenance for freight wagons based on PN-EN 50126:2002 standard and RAMS indicators (Reliability, Availability, Maintainability and Safety). This paper describes factor analysis of the proposed indicators as a means of selecting those that have a decisive impact on the correctness of the process for monitoring vehicles. This paper shows an example of the implementation of the requirements of the European Commission Regulation 445/2011 [3] regarding the monitoring of the state of railway vehicles and the possibility of using the information so gained as part of a process of continuous improvement. Reducing the number of indicators will reduce the amount of data needed to calculate all the RAMS indicators, without compromising the benefits of the rail vehicle monitoring system.
Źródło:
Logistics and Transport; 2017, 36, 4; 105-112
1734-2015
Pojawia się w:
Logistics and Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kinematic and dynamic analysis of new polar positioning system dedicated to mechatronic laser glass engraving system
Autorzy:
Trochimczuk, R.
Powiązania:
https://bibliotekanauki.pl/articles/955248.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
system pozycjonowania
analiza kinetyczna
analiza dynamiczna
polar positioning system
kinematic analysis
dynamic analysis
laser glass engraving
Opis:
Analytical formulas describing the kinematics and dynamics of a multibody system of a new polar positioning system dedicated to mechatronic laser glass or other transparent dielectrics engraving system will be presented in this work. The analytical results will become in the later stages of the research the basis of numerical simulations. They will optimize the proposed solution of the positioning system.
Źródło:
International Journal of Applied Mechanics and Engineering; 2014, 19, 4; 771-781
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An analysis of the conditions of an enterprise effectiveness assessment formation
Autorzy:
Malinowska, K.
Piontek, J.
Cyplik, P.
Powiązania:
https://bibliotekanauki.pl/articles/409310.pdf
Data publikacji:
2017
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
activity assessment
enterprise effectiveness
economic analysis
financial analysis
technical-economic analysis
logistic system
Opis:
The enterprise assessment is used to verify its activity and is a point of departure to make future decisions. The assessment quality depends on its executor’s knowledge, experience and capabilities. Enterprises have adopted an assessment performance method based on their needs and activity specifics. In the ever changing environment the applied enterprise assessment algorithm should be progressively improved. The present enterprise assessment satisfies its basic needs but is not sufficient. The assessment should be enriched by a number of elements that will consider the enterprise logistic system multidimensionality. Numerous factors and their mutual relations should be taken into account in the assessment. This makes it necessary to form a pattern of the enterprise assessment algorithm that would function as a guide.
Źródło:
Research in Logistics & Production; 2017, 7, 2; 67-75
2083-4942
2083-4950
Pojawia się w:
Research in Logistics & Production
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multivariate Analysis of Regional Differences in the Higher Education System in Poland
Analiza wielowymiarowa różnic regionalnych w Polsce pod względem szkolnictwa wyższego
Autorzy:
Ordon, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/905678.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
level of the higher education system
factor analysis
cluster analysis
Opis:
This article discusses an attempt at analysis of regional diversity in Poland in 2001 with respect to the level of the higher educational system. The first part of this report deals with ranking provinces with respect to the level of the higher educational system, measured by a synthetic variable. This variable is the result of 10 characteristics, weighted according to their influence on higher education. Selection of those characteristics was dictated by their use by experts as well as their availability in regional statistics data. In the second part of the article, the author presents dusters formed by provinces in two-dimensional areas: the first dimension indicates the level of higher educational system whereas the other dimension describes the socio-economic situation in the regions. This situation is represented by factors that have been singled out (by principal component analysis) as key among 21 characteristics, which potentially influence the higher educational system. The discovery of commonalities according to which those clusters are formed is the main purpose of the article.
Artykuł jest próbą analizy zróżnicowania regionalnego Polski w 2001 r. pod względem szkolnictwa wyższego. W pierwszej części artykułu opisany jest proces hierarchizacji województw pod względem poziomu szkolnictwa wyższego. Za miarę tego poziomu przyjęto zmienną syntetyczną, będącą średnią ważoną z 10 cech mogących świadczyć o poziomie szkolnictwa wyższego. Przy wyborze tych cech kierowano się zarówno ich zastosowaniem przez ekspertów, jak i dostępnością danych w statystyce regionalnej. W drugiej części artykułu autor przedstawia grupowanie województw w dwuwymiarowych przestrzeniach, gdzie pierwszy wymiar to poziom szkolnictwa wyższego, drugi natomiast opisuje sytuację społeczno-gospodarczą w regionach. Sytuację tę reprezentują czynniki wyodrębnione w analizie głównych składowych spośród 21 cech mających potencjalny wpływ na kształtowanie się szkolnictwa wyższego. Celem artykułu jest wykrycie prawidłowości, według których tworzą się te skupiska.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2006, 196
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stanowisko do pomiaru szerokości krawędzi narty
Ski edge width measurement stand
Autorzy:
Golijanek-Jędrzejczyk, A.
Michalski, K.
Powiązania:
https://bibliotekanauki.pl/articles/268254.pdf
Data publikacji:
2016
Wydawca:
Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Tematy:
system pomiarowy
systemy wizyjne
analiza obrazu
measurement system
vision system
image analysis
Opis:
Regeneracja sprzętu narciarskiego zapewnia nie tylko niezapomniane doznania na stoku, ale przede wszystkim bezpieczeństwo. Serwisowanie nart, poza smarowaniem, to w głównej mierze ostrzenie krawędzi na specjalistycznych szlifierkach. Poprawne wykonanie tej usługi polega na naostrzeniu krawędzi przy jednoczesnej minimalizacji ilości zebranego z narty materiału, co nie jest prostym zadaniem, gdyż typowa szerokość krawędzi narty jest rzędu 1,5 mm. W referacie zaprezentowane zostało specjalistyczne stanowisko zaprojektowane dla potrzeb serwisu nart (zarówno od strony sprzętowej jak i programowej). Zbudowany system pomiarowy umożliwia jednoczesny pomiar szerokości krawędzi narty w zakresie pomiarowym od 0,2 mm do 2 mm, zapewniając analizę szerokości krawędzi narty na ok. 80% jej długości.
Regeneration of ski equipment provides not only an unforgettable experience on the slopes, but most of all safety. Servicing skis, besides lubrication, is mainly sharpening edges on special grinding machines. Proper execution of this service is sharpening of the edge while minimizing the amount of material collected from the ski, which is not a trivial task, since the typical width of the ski edge is of the order of 1.5 mm. The paper will present a special stand (both hardware and software) designed for service of skis. The built measurement system can measure the width of the ski edge in the measuring range from 0.1 mm to 2 mm, providing an analysis of the width of the ski edge at approx. 80% of its length. The paper presents the results of these tests confirm the correctness of operation and reasoning as planned.
Źródło:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2016, 51; 55-58
1425-5766
2353-1290
Pojawia się w:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Features of the content-analysis method for text categorization of commercial content in processing online newspaper articles
Autorzy:
Vysotska, V.
Chyrun, L
Powiązania:
https://bibliotekanauki.pl/articles/118191.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
computer linguistic system
text analysis
text synthesis
content system management
Opis:
This paper presents the features of text categorization of commercial content in linguistic modelling. Description of syntax sentence modelling is applied to automate the processes of analysis and synthesis of texts in natural language for commercial content categorization. This article suggests methods of content analysis for online newspaper. The model describes the processing of information resources systems of content analysis and simplifies the technology of content management system automation. General problems of syntactical and semantic content analysis and functional services of content management system are analysed.
Źródło:
Applied Computer Science; 2015, 11, 1; 15-30
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analizy porównawcze systemów katastralnych w 12 krajach europejskich, opracowane przy zastosowaniu metod statystycznych
Autorzy:
Bełej, M.
Powiązania:
https://bibliotekanauki.pl/articles/129577.pdf
Data publikacji:
2001
Wydawca:
Stowarzyszenie Geodetów Polskich
Tematy:
system katastralny
Europa
analiza wielowymiarowa
cadastral system
Europe
multidimensional analysis
Opis:
The building of an efficient cadastral system is an important element of the development of the Polish State. It is crucial for a smooth operation of the real estates market - the security and easy of making transactions, registering to a property, planning operations, the introduction of the ad valorem tax on property and more rational use of space. This paper presents the results of a project to compare the performance of cadastral systems internationally, by creating appropriate integrated indicators of cadastral system, using the statistical techniques: technique Friedmana, technique W-Kendalla, factor analysis.
Źródło:
Archiwum Fotogrametrii, Kartografii i Teledetekcji; 2001, 11; 1-51-1-58
2083-2214
2391-9477
Pojawia się w:
Archiwum Fotogrametrii, Kartografii i Teledetekcji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
System szkolnictwa wyższego a kapitał intelektualny regionu w wybranych krajach europejskich
Higher education system vs. intellectual capital of the region, based on selected European countries
Autorzy:
Rószkiewicz, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/424819.pdf
Data publikacji:
2013
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
intellectual capital
higher education system
principal components analysis
re¬gression analysis
Opis:
This paper analyzes the relation between intellectual capital and development of higher education system. The measurement was executed for the set of 16 UE countries, including Poland. Applied approach into the measurement of intellectual capital was regarded as the extension of the proposals presented by the author in the Report of Intellectual Capital of Poland (www.innowacyjnosc.gpw.pl/kip). The paper focuses on crucial features of the higher education system which was extracted in the procedure of principal components. Using these components a comparative analysis of Polish higher education system in Poland was examined and collated with systems of other UE countries. The study also examined the influence of these crucial factors on the level of intellectual capital. A regression model describing dependence of intellectual capital on these core components was estimated. The results show a big disproportion between quality and range of the Polish higher education system. That means that the prevalent development of Polish higher education system focuses on the scale of functioning but extensive development does not follow development of quality. However, the model of the relation estimated for a set of UE countries shows that the qualitative features of the higher education system play a crucial role in shaping the level of intellectual capital.
Źródło:
Econometrics. Ekonometria. Advances in Applied Data Analytics; 2013, 2(40); 9-21
1507-3866
Pojawia się w:
Econometrics. Ekonometria. Advances in Applied Data Analytics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effectiveness of the Integrated Zone Comparison Technique (IZCT) with Various Scoring Systems in a Mock Crime Experiment by Students
Autorzy:
Gordon, Nathan J.
Fleisher, William L.
Powiązania:
https://bibliotekanauki.pl/articles/523237.pdf
Data publikacji:
2012
Wydawca:
Krakowska Akademia im. Andrzeja Frycza Modrzewskiego
Tematy:
Integrated Zone Comparison Technique (IZCT)
Data Analysis, Horizontal Scoring System (HSS)
3-Point Manual Scoring System
7-Point Manual Scoring System
Validity
Polygraph Validation Test (PVT)
Źródło:
European Polygraph; 2012, 6, 1(19); 5-17
1898-5238
2380-0550
Pojawia się w:
European Polygraph
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary results of a system-theoretic assessment of maritime autonomous surface ships’ safety
Autorzy:
Wróbel, K.
Krata, P.
Montewka, J.
Powiązania:
https://bibliotekanauki.pl/articles/117567.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Maritime Autonomous Surface Ships (MASS)
autonomous ship
MUNIN project
Advanced Autonomous Waterborne Application (AAWA)
System-Theoretic Process Analysis (STPA)
System-Theoretic Accident Model and Process (STAMP)
unmanned shipping system
safety at sea
Opis:
While a system-theoretic approach to the safety analysis of innovative socio-technical systems gains a growing acceptance among academia, safety issues of Maritime Autonomous Surface Ships (MASS) remain largely unexplored. Therefore, we applied a System-Theoretic Process Analysis to develop and analyze a preliminary model of the unmanned shipping system in order to elaborate safety recommendations for future developers of the actual system. Results indicate that certain advancements shall be undertaken in relation to MASS’ software solutions in particular.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 4; 717-723
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A computational fluid flow analysis of a disc valve system
Autorzy:
Czop, P.
Śliwa, P.
Gniłka, J.
Gąsiorek, D.
Wszołek, G.
Powiązania:
https://bibliotekanauki.pl/articles/244640.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
valve system
computational fluid flow analysis
simulation
Opis:
Noise concerns in shock absorbers can be divided into two categories. The first is fluid flow noise, or “swish noise”, caused by the oil being forced through openings in the valves. The type and temperature of the oil, its velocity and the orifice geometry all have an effect on this. In addition, the structural design of the shock absorber shell may either reduce or amplify the noise. The second type of shock absorber noise is often described as regular operational noise or “chuckle noise”. It can be observed in vehicles during low-displacement, higher-frequency events, such as driving over a slightly rough road. This effect measurable as a force discontinuity into the vehicle and can come from a number of sources in the shock absorber, e.g. hydraulic transitions. It is often traceable to the valve discs closing and opening, but can also be caused by cavitation/aeration in the oil and air being pulled through the valves. The work on noise improvement reported in this paper has been started using conventional shock absorbers to be extended and will cover in the future variable damping shock systems as well. The paper gives an overview about the configurations of a typical valve system including three basic regimes of operation, which correspond to the amount of oil flowing through a valve cavity. The aim of this work was to propose a finite element fluid flow model, which can be used in order to reduce the velocity of fluid flow through a cavity of a shock absorber valve. High flow velocity can cause high-content frequency vibrations and, in turn, audible noise. The model will be used for initial screening of new valve concepts and on the other hand to improve the currently use ones.
Źródło:
Journal of KONES; 2011, 18, 1; 117-122
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of the linear form of dynamical equations of the satellite attitude control system for its analysis and synthesis
Autorzy:
Moldabekov, Meirbek
Sukhenko, Anna
Shapovalova, Darya
Yelubayev, Suleimen
Powiązania:
https://bibliotekanauki.pl/articles/1839688.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
synthesis
stability analysis
attitude control system
satellite
Opis:
At present, the methods based on using linearized dynamical equations are applied for syn- thesis of an attitude control system of a satellite with nonlinear dynamics. Linearized equa- tions describe the satellite dynamics approximately, which is the main their disadvantage. This article shows that basing on the angular momentum theorem, the nonlinear dynamical equations of the satellite attitude control system can be represented in the form of linear differential equations with variable coefficients, which makes it possible to use engineering methods of stability analysis and analysis of transient quality in the process of synthesis of the satellite attitude control system.
Źródło:
Journal of Theoretical and Applied Mechanics; 2021, 59, 1; 109-120
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Failure risk analysis in the water distribution system
Autorzy:
Tchórzewska-Cieślak, B.
Powiązania:
https://bibliotekanauki.pl/articles/2069656.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
risk analysis
failure
risk
water distribution system
Opis:
A water distribution system (WDS) ought to be high reliable continuous operating system. Failure factors in WDS should be identified and prioritised, for example, the causing factors in the most frequent failures in water-pipe network. In this paper, the failure risk analysis of the WDS is presented, and accordingly, a New method consisting the failures index (FI) and the evaluation of risk of failure within the relevant area, based on the assumed categories (tolerable, controlled and unacceptable risk). It is expecting that the methodology for the WDS performance risk analysis would provide the city leadership for decision making support.
Źródło:
Journal of Polish Safety and Reliability Association; 2010, 1, 1; 247--254
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical thermal analysis of a car braking system
Autorzy:
Różyło, P.
Powiązania:
https://bibliotekanauki.pl/articles/102377.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
Abaqus
braking system
numerical analysis
temperature distribution
Opis:
The study involved performing a numerical thermal analysis of selected components in a car braking system. The primary goal of the study was to determine the regions which are most susceptible to variations in temperature, and to determine the degree of thermal impact upon them. The analysis was performed using the Abaqus environment. The examined components of the braking system were made of materials reflecting mechanical properties of the real subassemblies. The FEM analysis enabled determination of the distribution of temperature in the system with respect to the properties of the investigated materials and applied boundary conditions.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 2; 38-43
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Elaboration of the Method of Fatigue Testing of the Rotor of the Mosups Plane Propulsion System
Autorzy:
Głowacki, D.
Rodzewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/97933.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:
UAV
propulsion system
stress analysis
fatigue tests
Opis:
This paper concerns fatigue testing of the rotor of the propulsion system for the MOSUPS – an unmanned aircraft designed in a joint wing configuration, and equipped with a ducted propeller. The work presents the analysis of the stresses and deformations of the rotor structure as well as the form of the loading cycle. The aim of the paper is to introduce the concept of a simplified method of fatigue testing of multi-blade rotors. With the sophisticated geometry of the rotor in mind – the authors applied the FEM tools and implemented the ANSYS and nCode programs. The prototype of the fatigue stand built by the authors is also presented in the paper.
Źródło:
Fatigue of Aircraft Structures; 2016, 8; 97-103
2081-7738
2300-7591
Pojawia się w:
Fatigue of Aircraft Structures
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The international GIS day – analysis of celebrations in Poland and its importance to geographic education
Autorzy:
Kunz, M.
Powiązania:
https://bibliotekanauki.pl/articles/2084600.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
Polska
geographic education
GIS system
geoinformation
analysis
Opis:
Geographic Information Systems were classified as one of the most important technological „inventions” of the 20th century for geography. GIS, as the content of lectures, and later as a university subject, was introduced at Polish universities and colleges relatively late - only at the beginning of the 1990s. At first, it was an extension of the content scope discussed within the framework of cartography and topography, and only later - as independent lectures and practical classes. An excellent supplement to the content of lectures and practical workshops, as well as an indication of proper students' attitudes towards geoinformation is the International GIS Day organized every year in November for more than 10 years in Poland and worldwide. The objective of this event is to popularize the knowledge about geoinformation systems and their broad applications. The first celebration of this day took place on the 18th of November 1999 in several countries at the same time, and the proposed theme - 'application of GIS is limited only by the imagination of people who use it' - remains valid until now. Since the first shows, one can observe an increasing number of countries and academic, institutional and commercial centres introducing the modern geography to all who are interested in it through this open and interesting form. The research aimed at analysing the previous celebrations of the GIS Day in Poland (2000-2010), as well as making an attempt to determine the significance of this form of sharing the knowledge and skills in geographic education.
Źródło:
Prace i Studia Geograficzne; 2011, 48; 197-209
0208-4589
Pojawia się w:
Prace i Studia Geograficzne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on an Innovative FLEX Bicycle Frame with a Softtail Vibration Damping System
Autorzy:
Kuczek, Łukasz
Marczak, Paweł
Muzykiewicz, Wacław
Mroczkowski, Marcin
Paćko, Paweł
Drop, Dawid
Powiązania:
https://bibliotekanauki.pl/articles/2201887.pdf
Data publikacji:
2023
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
elastomer
bike frame
FLEX bike frame
damping system
strength analysis
fatigue analysis
impact test
softtail damping system
Opis:
Bicycles are gaining more and more popularity, especially in crowded cities where there is a problem with traffic jams and a limited number of parking spaces. The bicycles are also often used by mountain bikers during riding on off-road trails. In both cases, the important parameters are the stiffness of the bicycle frame, the weight of the bicycle, but also driving comfort. To improve comfort and reduce vibrations in the bicycle frame both front and rear shock absorbers are used. The use of traditional shock absorbers increase the weight of the bike and its price. The work characterizes a modern damping system, Softtail type, designed by AG Motors. In this case, the damping element (elastomer) was placed directly in the rear fork. Analyses of polyurethanes of various hardness were carried out in terms of the possibility of using them as a vibration damper. A numerical and experimental analysis of the bicycle frame was performed, adapted to the a new shock-absorber system. Strength, fatigue and impact tests were carried out in accordance with the relevant bicycle standards. Research has shown that the frame bicycle with the Softtail system, meets the requirements of the standards.
Źródło:
Advances in Science and Technology. Research Journal; 2023, 17, 1; 290--303
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiz neuchtennykh raskhodov vody v sisteme vodootvedenija
An analysis of unaccounted water in the sewerage system
Autorzy:
Zajjchenko, L.
Lesnojj, V.
Popov, A.
Powiązania:
https://bibliotekanauki.pl/articles/76820.pdf
Data publikacji:
2013
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
water supply system
sanitation
sewage system
waste water
service
cost
analysis
Opis:
The methods of determining the unaccounted water in the sewerage system has been developed. An objective assessment of these costs will assign economically to justify tariffs for water and wastewater services, to carry out targeted work on resource companies on water supply and sanitation.
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2013, 15, 5
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computer aided operation cost prediction of complex technical systems with reserve and improved components
Autorzy:
Kołowrocki, K.
Mazurek, J.
Soszyńska-Budny, J.
Powiązania:
https://bibliotekanauki.pl/articles/2069546.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
complex technical system
operation process optimization
operation cost analysis
improved system
Opis:
There is presented the computer program based on methods and algorithms for prediction of the operation cost of the complex technical system in variable operation conditions. The program allows to determine of the costs of the non-repairable and repairable improved complex technical systems before and after their operation processes optimization. The procedure of the computer program use and its application to operation cost analysis of the exemplary complex technical system.
Źródło:
Journal of Polish Safety and Reliability Association; 2011, 2, 2; 345--360
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Critical situations and human resources in discrete transportation systems analysis
Autorzy:
Walkowiak, T.
Mazurkiewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/2069570.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
discrete transportation system
system dependability
critical situations analysis
Monte-Carlo simulation
Opis:
The paper presents an approach to critical situations analysis related to discrete transportation systems (DTS). The critical situation is understood as sudden shortage of some system recourses resulting in the transportation system performance degradation. The analysis is realized based on availability calculation of DTS. The system is described by the formal model, which includes reliability and functional parameters of DTS as well as human resources – drivers and management system. The availability and average availability of the system, defined in a functional way, is discussed as a function of different essential parameters of DTS. The proposed analysis is based on the modelling and simulating of the system behaviour using Monte-Carlo approach. The paper presents some exemplar systems – based on real Polish Post DTS – modelling and results.
Źródło:
Journal of Polish Safety and Reliability Association; 2011, 2, 1; 205--216
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modernization of the outflow system of cross-flow turbines
Autorzy:
Kaniecki, M.
Powiązania:
https://bibliotekanauki.pl/articles/1931595.pdf
Data publikacji:
2002
Wydawca:
Politechnika Gdańska
Tematy:
cross-flow turbine
CFD analysis
outflow system
Opis:
The presented article brings general overview of CFD analysis of two cross-flow turbine types (a classical impulse turbine and a reaction turbine). The author focuses his attention mainly on the discussion of differences in flow patterns in the outflow section of these turbines, because this element exerts significant impact on performance properties of the turbine. The article presents a comparison of computations and experimental results of the cross-flow turbine manufactured by IMP PAN. The analysis was performed by means of a computer program FLUENT for a two-dimensional example.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2002, 6, 4; 601-608
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methods for integrated Failure Risk Analysis of Water Network in terms of Water Supply System Functioning Management
Autorzy:
Tchórzewska-Cieślak, B.
Pietrucha-Urbanik, K.
Powiązania:
https://bibliotekanauki.pl/articles/2068882.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
water supply system
failure indicators
risk analysis
Opis:
In the paper the issues connected with failure risk analysis related to the functioning of this system were presented. In the analysis of water supply system it is important to assess the safety of its operation, both from the producer and the consumer point of view. The paper presents the method of analysis of consumers acceptance of water costs that companies bear for the risk reduction. The proposed method can be the basis of comprehensive program of risk failure management and in decision-making on water supply operation.
Źródło:
Journal of Polish Safety and Reliability Association; 2017, 8, 1; 157--166
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sensitivity analysis of an identification method dedicated to nonlinear systems working under operational loads
Analiza wrażliwości metody identyfikacji układów nieliniowych w warunkach eksploatacyjnych
Autorzy:
Iwaniec, J.
Powiązania:
https://bibliotekanauki.pl/articles/281049.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
sensitivity analysis
nonlinear system identification
operational loads
Opis:
In the paper, the exploitational nonlinear systems identification method based on algorithms of the restoring force, boundary perturbations and direct parameter identification methods is presented. The obtained parameter estimates provide information concerning forces transferred on the foundation and find application in the model-based diagnostics. The results of the sensitivity analysis carried out in order to assess the influence of input parameters uncertainties (accuracy of resonant frequency and amplitude estimates, errors of transfer function estimation in operational conditions, value of introduced additional mass) on the accuracy of estimated system parameters are also presented.
W pracy przedstawiono metodę operacyjnej identyfikacji parametrów modeli nieliniowych konstrukcji mechanicznych, realizowaną w oparciu o algorytmy metody sił resztkowych, zaburzeń brzegowych oraz bezpośredniej identyfikacji parametrów. Uzyskane estymaty parametrów dostarczają informacji o siłach przekazywanych na pod- łoże i znajdują zastosowanie w diagnostyce realizowanej w oparciu o model układu nieuszkodzonego. W celu oszacowania wpływu niepewności parametrów wejściowych na dokładność estymowanych parametrów układu, przeprowadzono analizę wrażliwości poszukiwanych parametrów układu (masy, sztywności, tłumienia) na dokładność estymacji częstotliwości i amplitud rezonansowych (uwarunkowaną błędami estymacji funkcji przejścia w warunkach eksploatacyjnych), a także wartość masy wprowadzanej do układu w celu zmodyfikowania jego własności dynamicznych (zgodnie z algorytmem metody zaburzeń brzegowych).
Źródło:
Journal of Theoretical and Applied Mechanics; 2011, 49, 2; 419-438
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of multi-criteria analysis based on individual psychological profile for recommender systems
Autorzy:
Rafalak, M.
Granat, J.
Wierzbicki, A. P.
Powiązania:
https://bibliotekanauki.pl/articles/305393.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
recommender system
multi-criteria analysis
user profiling
Opis:
This paper presents a novel approach for user classification exploiting multi- criteria analysis. This method is based on measuring the distance between an observation and its respective Pareto front. The obtained results show that the combination of the standard KNN classification and the distance from Pareto fronts gives satisfactory classification accuracy – higher than the accuracy ob- tained for each of these methods applied separately. Conclusions from this study may be applied in recommender systems where the proposed method can be implemented as the part of the collaborative filtering algorithm.
Źródło:
Computer Science; 2016, 17 (4); 503-517
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł

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