Wszystkie pola: Knopik, L. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Application of principal component analysis for optimization of a system operation assessment criteria set
Autorzy:: Muślewski, Ł.
Knopik, L.
Powiązania:: https://bibliotekanauki.pl/articles/247903.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: quality
criteria
transport system
analysis
canonical correlations
optimization
Opis:: The analysis of results of experimental tests and a literature survey of the issue reveal that the subject matter connected with determination of the optimal number of a given transportation system operation assessment criteria has a direct influence on the result of the considered assessment. The analysis was made within the research on operation quality of a selected transportation system. In order to optimize the analysed system assessment criteria, a theoretical description has been made and an example of canonical correlations application has been presented. Analysis of canonical correlations involves determination of linear combination parameters of the studied sets so that the obtained correlation coefficient will have maximal value. In the successive step, the next pair of linear combination are not correlated with the combinations determined in the first step. The determined correlations can measure the power of relation between two sets of variables and are useful in the process of choosing significant criteria for a given research object operation quality assessment.
Źródło:: Journal of KONES; 2013, 20, 4; 307-312
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Application of principal component analysis for optimization of a system operation assessment criteria set
Autorzy:: Muślewski, Ł.
Knopik, L.
Powiązania:: https://bibliotekanauki.pl/articles/242963.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: quality
criteria
transport system
analysis of main components
optimization
Opis:: The analysis of results of experimental tests and a literature survey on the issue reveal that the subject matter connected with determination of the optimal number of a given transportation system operation assessment criteria has a direct influence on the result of the considered assessment. Whole study has been made on the basis of the analysis of data obtained from tests performed in a real municipal transportation system, providing transport tasks in a 400 thousand urban agglomeration. On the basis of the tests, there was determined a set of sixteen criteria for the system operation assessment, depending on preferences of drivers, passengers, workers of the system providing vehicles with serviceability and the last group of results is a final assessment. The research involved tests of significance for correlation coefficients between the assessment criteria. The method of main factors involving analysis of a linear transformation of existing vector of variables X into Y has been used to study the task dimensioning. Proper values, providing basis for determination of a new space correspond to coordinates of the newly created vector Y. On this basis, the dimension of the criteria and their significance space has been concluded. The determined criteria have been accepted for the development of a resultant model for assessment of a transportation system operation quality.
Źródło:: Journal of KONES; 2012, 19, 4; 481-486
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Zastosowanie metody głównych czynników do badania wymiarowości zbioru kryteriów
Analysis of main components for dimensionality of criteria set
Autorzy:: Muślewski, Ł.
Knopik, L.
Powiązania:: https://bibliotekanauki.pl/articles/310176.pdf
Data publikacji:: 2013
Wydawca:: Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:: metoda głównych czynników
system transportowy
model ocenowy
ocena jakości
main components
transport system
evaluation model
quality assessment
Opis:: Analiza wyników badań eksploatacyjnych oraz literaturowy przegląd zagadnienia wykazały, że problematyka wyznaczenia optymalnej liczby kryteriów oceny jakości działania danego systemu transportowego jest istotnym i aktualnym zagadnieniem, mającym bezpośredni wpływ na wynik realizowanej oceny. Całość rozważań dokonano na podstawie analizy danych pozyskanych z badań zrealizowanych w rzeczywistym systemie autobusowego transportu miejskiego, świadczącego usługi transportowe w 500 tysięcznej aglomeracji miejskiej. Na podstawie zrealizowanych badań, wyznaczono zbiór kryteriów oceny systemu. Niniejsze kryteria poddano ocenie z punktu widzenia ich istotności na jakość działania obiektu badań, dokonując ich podziału na cztery grupy, w zależności od preferencji i wymogów kierowców, pasażerów oraz pracowników podsystemu sterowania i zapewnienia zdatności. W celu optymalizacji wymiarowości rozpatrywanego zbioru kryteriów, zastosowano metodę głównych czynników, która polega na porównaniu wyróżnionych zbiorów parami, i na tej podstawie ustaleniu korelacji między ich elementami. W wyniku zrealizowanych badań wnioskowano o liczności i istotności zbioru analizowanych kryteriów. Na tej podstawie wyróżniono zbiór kryteriów, które w dalszym etapie realizowanych prac, uwzględniono w procesie budowy modelu wynikowego oceny jakości działania systemu transportowego.
The analysis of experimental tests and a literature review have revealed that the problems connected with determining the optimal number of criteria for of a given transportation system operation quality assessment is an issue of great importance as it has a direct influence on the result of the assessment. The whole study has been performed on the basis of an analysis of data obtained from tests carried out in a real busses transportation system providing services in an urban agglomeration of 500 thousand inhabitants. On the basis of the carried out tests, a set of criteria for assessment of the system, were developed. These criteria were evaluated from the point of view of their influence on the research object operation quality, being divided into four groups, depending on preferences and requirements of drivers, passengers, and workers of the subsystem of control and serviceability ensuring. In order to optimize dimensionality of the considered set of criteria, the method of analysis of main components, involving a comparison of identified pairs of sets in order to find correlation between their elements, was used. In result of the tests the number and significance of these sets were established. On the basis of this, a set of criteria was identified. They were used in further analysis and taken into consideration while building a resultant model for a transport system operation quality assessment.
Źródło:: Autobusy : technika, eksploatacja, systemy transportowe; 2013, 14, 3; 2345-2352
1509-5878
2450-7725
Pojawia się w:: Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Semi-Markov model of quality state changes of a selected transport system
Autorzy:: Landowski, B.
Muślewski, Ł.
Knopik, L.
Bojar, P.
Powiązania:: https://bibliotekanauki.pl/articles/241811.pdf
Data publikacji:: 2017
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport system
efficiency
operation process
maintenance process
semi-Markov process
simulation tests
Opis:: The study deals with the problems connected with evaluation and analysis of transport systems operational quality. The research object is a real, sociotechnical system (of the type H-M-E) whose functional quality is affected by: operators, equipment and technical state of he operated vehicles and the environmental impact. A scheme of an assessment model was built on the basis of a developed concept of a system operational quality and a random process was defined to be used for the analysis. The assessment process involves investigating the variability degree of properties included in the resultant model in a given time and determining whether and to what degree the obtained values meet the requirements of the system appropriate operational quality. On the basis of the above assumptions and in result of experimental tests, four qualitative states of a transport system functioning, which represent intervals of values of the obtained grades in given time moments, were distinguished. The study presents a model of system operation qualitative state changes developed with the use of Markov chain inserted into a certain semi-Markov process. A graph and a matrix for probability of transition between the states were created and boundary distributions of the process were determined on the basis of experimentally obtained data. A system of equations was determined for the distinguished Markov chain, on the basis of which a mathematical model for assessment and control of operational quality of selected types of transport systems will be built.
Źródło:: Journal of KONES; 2017, 24, 4; 141-148
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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