Temat: ageing system - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Reliability analysis of multi-state ageing consecutive „k out of n: F” systems
Autorzy:: Guze, S.
Kołowrocki, K.
Powiązania:: https://bibliotekanauki.pl/articles/2069622.pdf
Data publikacji:: 2007
Wydawca:: Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:: multi-state system
ageing system
consecutive “k out of n : F” system
reliability
Opis:: A multi-state approach to reliability analysis of systems composed of ageing components is introduced and basic reliability characteristics for such systems are defined. Further, a multi-state consecutive “ k out of n : F” system composed of ageing components is defined and the recurrent formulae for its reliability function are proposed. Moreover, the application of the proposed reliability characteristics and formulae to reliability evaluation of the steel cover composed of ageing sheets is illustrated.
Źródło:: Journal of Polish Safety and Reliability Association; 2007, 1; 173--180
2084-5316
Pojawia się w:: Journal of Polish Safety and Reliability Association
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Modelling safety of multistate systems with ageing components
Autorzy:: Soszyńska-Budny, J.
Powiązania:: https://bibliotekanauki.pl/articles/2069387.pdf
Data publikacji:: 2013
Wydawca:: Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:: safety
risk
multistate system
ageing
Opis:: Basic notions of the ageing multistate systems safety analysis are introduced. The system components and the system multistate safety functions are defined. The mean values and variances of the multistate systems lifetimes in the safety state subsets and the mean values of their lifetimes in the particular safety states are defined. The multi-state system risk function and the moment of exceeding by the system the critical safety state are introduced. The exemplary safety structures of the multistate systems with ageing components are defined and their safety functions are determined. As a particular case, the safety functions of the considered multistate systems composed of components having exponential safety functions are determined. Applications of the proposed multistate system safety models to the evaluation and prediction of the safty characteristics of the exemplary series, parallel, “m out of n”, consecutive “m out of n: F”, series-parallel, parallel-series and “m out of l”-series systems are presented as well.
Źródło:: Journal of Polish Safety and Reliability Association; 2013, 4, 1; 109--120
2084-5316
Pojawia się w:: Journal of Polish Safety and Reliability Association
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Reliability of large port grain transportation system
Autorzy:: Kołowrocki, K.
Soszyńska-Budny, J.
Torbicki, M.
Powiązania:: https://bibliotekanauki.pl/articles/2069510.pdf
Data publikacji:: 2014
Wydawca:: Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:: reliability
multistate system
ageing
large system
operation process
grain transportation system
Opis:: The combination of the results on the reliability of complex multi-state systems related to their operation processes and the results concerning the limit reliability functions of the multistate systems is proposed, to obtain the results on the asymptotic approach to the evaluation of the large complex multi-state systems reliability at the variable operation conditions. The asymptotic approach to the large complex system reliability evaluation and the large complex system limit reliability function are defined. Limit reliability functions of selected large complex systems composed of components having Weibull reliability functions are fixed. The way of using this results is illustrated by their application to the evaluation of reliability characteristics of the large complex port grain transportation subsystem composed of three large multistate non-homogeneous series systems and changing its reliability structure and its components reliability parameters at variable operation conditions.
Źródło:: Journal of Polish Safety and Reliability Association; 2014, 5, 2; 77--86
2084-5316
Pojawia się w:: Journal of Polish Safety and Reliability Association
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Safety of multistate ageing systems
Autorzy:: Kołowrocki, K.
Soszyńska-Budny, J.
Powiązania:: https://bibliotekanauki.pl/articles/2068950.pdf
Data publikacji:: 2016
Wydawca:: Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:: safety function
risk function
multistate system
ageing
oil pipeline system
Opis:: Basic notions of the ageing multistate systems safety analysis are introduced. The system components and the system multistate safety functions are defined. The mean values and variances of the multistate systems lifetimes in the safety state subsets and the mean values of their lifetimes in the particular safety states are defined. The multi-state system risk function and the moment of exceeding by the system the critical safety state are introduced. The exemplary safety structures of the multistate systems with ageing components are defined and their safety functions are determined. As a particular case, the safety functions of the considered multistate systems composed of components having exponential safety functions are determined. Applications of the proposed multistate system safety models to the evaluation and prediction of the safty characteristics of the oil piping transportation system is presented as well.
Źródło:: Journal of Polish Safety and Reliability Association; 2016, 7, 3; 131--142
2084-5316
Pojawia się w:: Journal of Polish Safety and Reliability Association
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: The research on ageing of glycol-based brake fluids of vehicles in operation
Autorzy:: Caban, J.
Droździel, P.
Vrábel, J.
Šarkan, B.
Marczuk, A.
Krzywonos, L.
Rybicka, I.
Powiązania:: https://bibliotekanauki.pl/articles/957941.pdf
Data publikacji:: 2016
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: braking system
fluids ageing
operational
road safety
wear
Opis:: The road safety depends on many factors, including the efficiency of the technical system and the disposal of the driver of the vehicle. As wear of most of the vehicle assemblies threatened only with a breakdown, excessive wear of the braking system components may pose a risk of a traffic accident. The article presents a study on the quality of the brake fluid conductivity as a function of temperature and water content conducted for a selected group of vehicles. This group of vehicles was characterized by different production date and had a different of vehicle mileage. We presented the methodology of statistical analysis of the quality of brake fluid tests in selected 38 passenger vehicles in operation.
Źródło:: Advances in Science and Technology. Research Journal; 2016, 10, 32; 9-16
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Reliability of large and complex systems : state of art
Autorzy:: Kołowrocki, K.
Powiązania:: https://bibliotekanauki.pl/articles/2069522.pdf
Data publikacji:: 2014
Wydawca:: Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:: reliability
two-state system
multistate system
ageing
operation process
complex system
optimization
applications
Opis:: The author’s latest monograph “Reliability of large and complex systems” published by Elsevier in 2014 is presented. The paper is composed of an introduction, the monograph contents, conclusions and the references the monograph contents is based on.
Źródło:: Journal of Polish Safety and Reliability Association; 2014, 5, 2; 63--76
2084-5316
Pojawia się w:: Journal of Polish Safety and Reliability Association
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Reliability analysis of complex shipyard transportation system with dependent components
Autorzy:: Blokus-Roszkowska, A.
Kołowrocki, K.
Powiązania:: https://bibliotekanauki.pl/articles/2069360.pdf
Data publikacji:: 2014
Wydawca:: Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:: reliability
multi-state system
ageing
operation process
dependability
complex system
shipyard transportation system
Opis:: In the paper an approach to the reliability analysis of multi-state systems with dependent components operating at variable operation conditions is presented. The multi-state reliability function of complex system is defined and determined for the shipyard rope ship elevator. In developed models, it is assumed that system components have the multi-state exponential reliability functions with interdependent departures rates from the subsets of reliability states.
Źródło:: Journal of Polish Safety and Reliability Association; 2014, 5, 1; 21--32
2084-5316
Pojawia się w:: Journal of Polish Safety and Reliability Association
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Stochastic orders and ageing classes
Autorzy:: Miziuła, Patryk
Powiązania:: https://bibliotekanauki.pl/articles/748756.pdf
Data publikacji:: 2012
Wydawca:: Polskie Towarzystwo Matematyczne
Tematy:: stochastic orders, ageing classes, closure properties, convolution, mixture, monotonic system.
stochastic orders
ageing classes
closure properties
convolution
mixture
monotonic system
Opis:: Teoria niezawodnosci opisuje losowe czasy działania urzadzen podatnychna awarie. Na potrzeby tego typu badan opracowano specyficzne branzowepojecia, m.in. resztowy czas zycia, intensywnosc awarii, czy sredni resztowy czaszycia. Ich definicje zostały podane w Rozdziale 2. Znalazły sie w nim takze podstawowe definicje i fakty dotyczace systemów monotonicznych. Systemy monotoniczne tworza bardzo prosty i wygodny model, opisujacy działanie urzadzen składajacych sie z odpowiednio ułozonych wzgledem siebie czesci. Jest to dynamicznie rozwijajaca sie teoria, znajdujaca zastosowania w wielu dziedzinach nauki. Wiecej na ten temat mozna dowiedziec sie z ksiazek [2] i [13].Rozmaite porzadki stochastyczne, czyli porzadki na zbiorach rozkładów prawdopodobienstwa, maja zastosowanie w wielu dziedzinach rachunku prawdopodobienstwa i statystyki matematycznej. Wiele o porzadkach mozna nauczyć się z książki [14]. W Rozdziale 3 niniejszego artykułu zostały zdefiniowane i porównane ze soba tylko te porzadki, które najbardziej przydaja sie w pracy z klasami rozkładów czasu zycia. Nie powinno dziwic, ze takie kryterium wyboru spełniaja przede wszystkim porzadki, które prostota definicji i wszechstronnym zastosowaniem zasłuzyły sobie na miano klasycznych. Relacje miedzy wprowadzonymi porzadkami zostały podsumowane na Rysunku 1.W Rozdziale 4 opisane zostały wybrane klasy rozkładów czasu zycia – zarównote znane od kilkudziesieciu lat, jak i niektóre sposród wprowadzonych stosunkowoniedawno. Nacisk został połozony na dwa zagadnienia: relacje miedzy poszczególnymi klasami oraz domknietosci poszczególnych klas wzgledem najczesciej uzywanych operacji niezawodnosciowych: splotów, mieszanek i tworzenia systemów monotonicznych. Zostały tez wyróznione klasy domkniete ze wzgledu na maksima i minima. Wyniki zostały podsumowane na Rysunku 2 i w Tabeli 2.Wszystkim zainteresowanym zastosowaniem przedstawionych pojec na pewnoprzypadnie do gustu przystepnie i rzetelnie napisana ksiazka [10].
This article covers knowledge of recently used stochastic orders, ageing classes, and relations between them. Definitions and relations between particular stochastic orders are presented there. The paper also contains definitions (especially using stochastic orders), relations and closure properties of ageing classes. Closure properties are investigated there under five useful reliability operations: convolutions, mixtures, formation of monotonic systems, maxima and minima.
Źródło:: Mathematica Applicanda; 2012, 40, 1
1730-2668
2299-4009
Pojawia się w:: Mathematica Applicanda
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Operation and reliability optimization of complex technical systems
Autorzy:: Kołowrocki, K.
Soszyńska-Budny, J.
Powiązania:: https://bibliotekanauki.pl/articles/2069477.pdf
Data publikacji:: 2014
Wydawca:: Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:: reliability
multistate system
ageing
operation process
optimization
exemplary application
Opis:: Modelling and prediction of the operation and reliability of technical multistate ageing systems related to their operation processes called complex systems are briefly presented and applied to prediction of the operation processes and reliability characteristics of an exemplary complex non-homogeneous system composed of a series-parallel and a series-“m out of l” subsystems linked in series, changing its reliability structure and its components reliability parameters at variable operation conditions. Further, the linear programming is proposed to the operation and reliability optimization of complex technical systems operating at variable operation conditions. The method consists in determining the optimal values of limit transient probabilities at the system operation states that maximize the system lifetimes in the reliability state subsets. The proposed method is practically applied to the operation and reliability optimization of the considered exemplary complex system.
Źródło:: Journal of Polish Safety and Reliability Association; 2014, 5, 1; 91--106
2084-5316
Pojawia się w:: Journal of Polish Safety and Reliability Association
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Healthcare public funding efficiency as exemplified by hospitals in Polish regions
Autorzy:: Kosycarz, Ewa Agnieszka
Dędys, Monika Małgorzata
Ekes, Maria Małgorzata
Powiązania:: https://bibliotekanauki.pl/articles/17901610.pdf
Data publikacji:: 2022-08-02
Wydawca:: Szkoła Główna Handlowa w Warszawie. Kolegium Zarządzania i Finansów
Tematy:: Data Envelopment Analysis
healthcare system efficiency
centralised/decentralised healthcare system
ageing society
salaries
Opis:: The aim of this study is to evaluate and compare the financial and managerial efficiency of healthcare inpatient systems in one country. The research question is: What factors give rise to efficiency variations within the regional healthcare system (hospitals)? A two-step approach proposed by Simar and Wilson has been applied. The first step applies the Data Envelopment Analysis to estimate the unit (i.e., a Polish region in our research) efficiency scores, which is followed by truncated regression with double bootstrapping to examine the impact of uncontrolled variables on efficiency scores. The efficiency scores obtained in 16 regions from the output-oriented model with non-increasing returns to scale indicate a full effectiveness of five regions. The DEA scores of the other regions exceed the value of 0.8 and do not differ significantly. The bootstrap-corrected DEA scores do not considerably change the efficiency assessment. The direction of the impact of the ‘percentage of people above 65 years of age’ variable and the ‘growth rate of total liabilities on efficiency’ variable is opposite to that observed for the ‘average salary’ variable. The results obtained suggest that the regional healthcare system efficiency can be affected by the ageing population, pay pressure, and liabilities.
Źródło:: Journal of Management and Financial Sciences; 2022, 45; 49-65
1899-8968
Pojawia się w:: Journal of Management and Financial Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Application of critical infrastructure safety modelling in port transport
Autorzy:: Kołowrocki, K.
Soszyńska-Budny, J.
Powiązania:: https://bibliotekanauki.pl/articles/134979.pdf
Data publikacji:: 2015
Wydawca:: Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:: safety
multi-state system
ageing
operation process
dependability
critical infrastructure
Opis:: A new approach is proposed for safety investigations of complex multistate systems. These systems have dependent components, called critical infrastructures, with variable operating conditions. The safety function of the critical infrastructure system is defined and determined for an exemplary “m out of l” critical infrastructure. In the fully-developed model, it is assumed that system components have multistate exponential safety functions with interdependent departure rates from subsets of safety states. A critical infrastructure safety model is adopted for an oil pipeline transportation system operating in a maritime port.
Źródło:: Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2015, 44 (116); 128-134
1733-8670
2392-0378
Pojawia się w:: Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Application of multistate systems safety modelling in maritime transport
Autorzy:: Kołowrocki, K.
Soszyńska-Budny, J.
Powiązania:: https://bibliotekanauki.pl/articles/135066.pdf
Data publikacji:: 2016
Wydawca:: Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:: safety
multi-state system
ageing
operation process
maritime transport
risk
Opis:: Basic concepts of the safety analysis of ageing multistate systems are introduced. The system components and the system multistate safety functions are defined. The mean values and variances of the multistate systems’ lifespans in the safety state subsets and the mean values of their lifespans in the particular safety states are defined. The multistate system risk function and the moment of exceeding the critical safety state are introduced. A series safety structure and a parallel-series safety structure of the multistate systems with ageing components are defined and their safety functions are determined. The multistate system safety models are applied to the prediction of safety characteristics of a maritime ferry.
Źródło:: Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2016, 45 (117); 114-119
1733-8670
2392-0378
Pojawia się w:: Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Reliability of the exemplary multistate series system with dependent components
Autorzy:: Blokus-Roszkowska, A.
Kołowrocki, K.
Powiązania:: https://bibliotekanauki.pl/articles/2069204.pdf
Data publikacji:: 2015
Wydawca:: Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:: reliability
dependent components
local load sharing
ageing components
multistate series system
Opis:: In the paper a multistate approach to reliability analysis of series systems with dependent components according to the local load sharing rule is proposed. As a particular case, the reliability function of a multistate series system composed of dependent components having exponential reliability functions is determined. The mean values and standard deviations of the multistate system lifetimes in the reliability state subsets and the mean values of its lifetimes in the particular reliability states are determined. Application of the proposed model of components’ dependency to the reliability analysis of the exemplary system is presented. The exemplary system risk function and the moment of exceeding by the system the critical reliability state are given.
Źródło:: Journal of Polish Safety and Reliability Association; 2015, 6, 1; 37--46
2084-5316
Pojawia się w:: Journal of Polish Safety and Reliability Association
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: On safety of critical infrastructures modeling with application to port oil transportation system
Autorzy:: Kolowrocki, K.
Soszynska-Budny, J.
Powiązania:: https://bibliotekanauki.pl/articles/2069166.pdf
Data publikacji:: 2013
Wydawca:: Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:: safety
multistate system
ageing
operation process
dependability
critical infrastructure
piping transport
Opis:: A new approach to safety investigations of multistate complex systems with dependent components at variable operation conditions called critical infrastructures is proposed. The safety function of the critical infrastructure system is defined and determined for an exemplary “m out of l” critical infrastructure. In the developed model, it is assumed that the system components have the multistate exponential safety functions with interdependent departures rates from the subsets of the safety states. The approach is adapted to safety prediction of oil piping transportation system operating at a maritime port.
Źródło:: Journal of Polish Safety and Reliability Association; 2013, 4, 2; 189--204
2084-5316
Pojawia się w:: Journal of Polish Safety and Reliability Association
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Reliability analysis of multistate series systems with dependent components
Autorzy:: Blokus-Roszkowska, A.
Kołowrocki, K.
Powiązania:: https://bibliotekanauki.pl/articles/2069307.pdf
Data publikacji:: 2015
Wydawca:: Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:: reliability
dependent components
local load sharing
ageing components
multistate series system
Opis:: In the paper an approach to the reliability analysis of multistate series systems assuming their components dependency according to the local load sharing rule is presented. There is introduced the local load sharing model of components dependency (of departures from the reliability states subsets) and the reliability function of a multistate series system with dependent components is determined. These results are also presented in case system components have exponential reliability functions and in this case basic reliability characteristics are given.
Źródło:: Journal of Polish Safety and Reliability Association; 2015, 6, 1; 31--36
2084-5316
Pojawia się w:: Journal of Polish Safety and Reliability Association
Dostawca treści:: Biblioteka Nauki

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