Wszystkie pola: system of state - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Numerical approach to reliability evaluation of two-state consecutive “k out of n: F” systems
Autorzy:: Guze, S.
Powiązania:: https://bibliotekanauki.pl/articles/2069597.pdf
Data publikacji:: 2007
Wydawca:: Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:: two-state system
consecutive “k out of n : F” system
reliability
algorithm
Opis:: An approach to reliability analysis of two-state systems is introduced and basic reliability characteristics for such systems are defined. Further, a two-state consecutive “ k out of n: F” system composed of two-state components is defined and the recurrent formulae for its reliability function are proposed. The algorithm for numerical approach to reliability evaluation is given. Moreover, the application of the proposed reliability characteristics and formulae to reliability evaluation of the system of pump stations composed of two-state components is illustrated.
Źródło:: Journal of Polish Safety and Reliability Association; 2007, 1; 167--172
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:: The semi-Markov model of the process of appearance of sea-going ship propupsion system ability and inability states in application to determining the reliablity of these systems
Autorzy:: Girtler, J.
Powiązania:: https://bibliotekanauki.pl/articles/259071.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: reliability
semi-Markov process
state of ability
state of inability
sea-going ship
ship propulsion system
Opis:: The article presents possible application of the theory of semi-Markov processes in creating the eight-state model of the process of appearance of the propulsion systems ability and inability states on sea-going vessels performing transportation tasks in a relatively long operating time t (t → ∞). The model has been proved to be able to be successfully used for determining the reliability of the abovementioned systems. The probability of faultless operation in time t was assumed the measure of system reliability. Operating situations of sea-going vessels were characterised, with special attention being paid to the fact that the loads of propulsion system components of these vessels are of random nature. These loads lead to damages which for this reason were also considered random events. It was also assumed that the damages provoke the appearance of states of inability of particular ship propulsion system components which means that these states are random events as well. The states of ability of a given ship propulsion system have been assumed to exist when all components of this system are in the state of ability. In case when at least one component is in the state of inability, the entire system is in the state of inability. Conditions were formulated for the reliability model of an arbitrary system to be able to be worked out in the form of the semi-Markov process. The need for the use of technical diagnostics in reliability examination of sea-going ship propulsion systems was indicated. In conclusions, certain qualities of the article were highlighted which are, in author’s opinion, of highest importance in reliability examination of sea-going ship propulsion systems.
Źródło:: Polish Maritime Research; 2013, 4; 18-24
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Maintenance Evaluation and Optimization of a Multi-State System Based on a Dynamic Bayesian Network
Autorzy:: Dahia, Zakaria
Bellaouar, Ahmed
Dron, Jean-Paul
Powiązania:: https://bibliotekanauki.pl/articles/2023959.pdf
Data publikacji:: 2021-09
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: multi-state system
dynamic Bayesian network
reliability
availability
maintenance optimization
Opis:: Nowadays, the main challenge in maintenance is to establish a dynamic maintenance strategy to significantly track and improve the performance measures of multi-state systems in terms of production, quality, security and even the environment. This paper presents a quantitative approach based on Dynamic Bayesian Network (DBN) to model and evaluate the maintenance of multi-state system and their functional dependencies. According to transition relationships between the system states modeled by the Markov process, a DBN model is established. The objective is to evaluate the reliability and the availability of the system with taking into account the impact of maintenance strategies (perfect repair and imperfect repair). Using the proposed approach, the dynamic probabilities of system states can be determined and the subsystems contributing to system failure can also be identified. A practical application is demonstrated by a case study of a blower system. Through the result of the diagnostic inference, to improve the performances of the blower, the critical components C, F, W, and P should be given more attention. The results indicate also that the perfect repair strategy can improve significantly the performances of the blower, while the imperfect repair strategy cannot degrade the performances in comparison to the perfect repair strategy. These results show the effectiveness of this approach in the context of a predictive evaluation process and in providing the opportunity to evaluate the impact of the choices made on the future measurement of systems performances. Finally, through diagnostic analysis, intervention management and maintenance planning are managed efficiently and optimally.
Źródło:: Management and Production Engineering Review; 2021, 13, 3; 3-14
2080-8208
2082-1344
Pojawia się w:: Management and Production Engineering Review
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

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: 5.

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: 6.

Tytuł:: Metoda oceny trwałości resztkowej wybranych urządzeń systemu awionicznego
The method for assessing residual durability of selecteddevices in avionics system
Autorzy:: Ważny, M.
Powiązania:: https://bibliotekanauki.pl/articles/301687.pdf
Data publikacji:: 2009
Wydawca:: Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:: system awioniczny
niezawodność
trwałość
stan dopuszczalny
stan graniczny
avionics system
reliability
durability
acceptable state
limit state
Opis:: Proces rozwój techniki lotniczej można podzielić na dwa, wzajemnie zależne, obszary: pierwszy związany z systemami technicznymi zabudowanymi na pokładzie statków powietrznych, drugi natomiast związanym z procesami eksploatacyjnymi statków powietrznych, a w szczególności modyfikacją metod i sposobów ich realizacji. Jedną z prób rozwoju w drugim z przytoczonych obszarów jest niniejsze opracowanie. W artykule przedstawiono metodę oceny trwałości resztkowej wybranego systemu awionicznego w oparciu o funkcję rozkładu czasu przekroczenia stanu granicznego przez wartości parametrów diagnostycznych urządzenia w trakcie trwania procesu eksploatacyjnego.
The development of aeronautical engineering can be divided into two interdependent fi elds: the fi rst one is connected with technical systems which are built on board of aircrafts, the second one concerns aircraft operation processes, especially the modification of methods and ways of their realization. This study attempts to develop the latter fi eld. The article presents the method for assessing residual durability of a selected avionics system which is based on the function of the distribution of time of the exceedance of limit state by the values of diagnostic parameters of a device during the operation process.
Źródło:: Eksploatacja i Niezawodność; 2009, 3; 55-64
1507-2711
Pojawia się w:: Eksploatacja i Niezawodność
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:: Semi-Markov model of system damage process
Autorzy:: Grabski, F.
Powiązania:: https://bibliotekanauki.pl/articles/2069526.pdf
Data publikacji:: 2011
Wydawca:: Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:: reliability
multi-state
semi-Markov
damages processes
Opis:: The reliability characteristics and parameters of multi-state systems modelled by the finite states regress characteristics and parameters of multi-state systems modelled by the finite states regress semi-Markov processes are investigated in the paper. Presented here models deal with un-repairable systems. The essential concepts of discrete states and continuous time semi-Markov process theory deliver. Mathematical apparatus for models constructions and analysis. Multi-state reliability functions and corresponding expectations, second moments and standard deviations are calculated for the presented systems.
Źródło:: Journal of Polish Safety and Reliability Association; 2011, 2, 1; 101--108
2084-5316
Pojawia się w:: Journal of Polish Safety and Reliability Association
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Reliability of the functioning of the water supply and sewerage system
Nadezhnost funkcionirovanija sistem vodosnabzhenija i vodootvedenija
Autorzy:: Saliev, E.
Powiązania:: https://bibliotekanauki.pl/articles/78156.pdf
Data publikacji:: 2013
Wydawca:: Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:: water supply system
sewage system
reliability
technical state
quality control
service
repair
operation
Opis:: The article concerns the property of reliability, as basic part of quality of the water supply system. Main aspects of reliability are described. Directions of security of reliability, structural security of reliability, control of reliability are observed. Structural and temporal redundancy of security of reliability, preventive system and the water supply and sewerage systems are covered. Property of maintainability as one of reliability items is defined.
Źródło:: Motrol. Motoryzacja i Energetyka Rolnictwa; 2013, 15, 5
1730-8658
Pojawia się w:: Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Time-dependant modelling of systems: some open questions
Autorzy:: Eid, M.
Powiązania:: https://bibliotekanauki.pl/articles/2069534.pdf
Data publikacji:: 2011
Wydawca:: Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:: system
reliability
failure
state
critical
transition
Boolean
graph
Opis:: Time dependent modelling of complex system is one of the important topics in system reliability engineering. Although system complexity is increasing, the existing models are numerically satisfactory. However, some formal development is still lacking in reliability theory. A full system time-dependency modelling and analysis is not possible without some formal answers on critical transitions and related issues. This is still one of the open questions in system reliability theory. Some promising development relative to critical states is given in this paper with an application case.
Źródło:: Journal of Polish Safety and Reliability Association; 2011, 2, 1; 83--94
2084-5316
Pojawia się w:: Journal of Polish Safety and Reliability Association
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Time-dependant modelling of systems : some open questions
Autorzy:: Eid, M.
Powiązania:: https://bibliotekanauki.pl/articles/2069573.pdf
Data publikacji:: 2007
Wydawca:: Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:: system
reliability
failure
critical state
transition
Boolean
graph
Opis:: Time dependent modelling of complex system is one of the important topics in system reliability engineering. Although system complexity is increasing, the existing models are numerically satisfactory. However, some formal development is still lacking in reliability theory. A full system time-dependency modelling and analysis is not possible without some formal answers on critical transitions and related issues. This is still one of the open questions in system reliability theory. Some promising development relative to critical states is given in this paper with an application case.
Źródło:: Journal of Polish Safety and Reliability Association; 2007, 1; 97--107
2084-5316
Pojawia się w:: Journal of Polish Safety and Reliability Association
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Preliminary reliability, risk and availability analysis and evaluation of bulk cargo transportation system in variable operation conditions
Autorzy:: Kołowrocki, K.
Kwiatuszewska-Sarnecka, B.
Soszyńska, J.
Powiązania:: https://bibliotekanauki.pl/articles/2069686.pdf
Data publikacji:: 2009
Wydawca:: Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:: system operation process
multi-state system
reliability
risk
availability
Opis:: In the paper, definitions and theoretical results on system operations process, multi-state system reliability, risk and availability modelling are illustrated by the example of their application to a bulk cargo transportation system operating in Gdynia Port Bulk Cargo Terminal. The bulk cargo transportation system is considered in varying in time operation conditions. The system reliability structure and its components reliability functions are changing in variable operation conditions. The system reliability structures are fixed with a high accuracy. Whereas, the input reliability characteristics of the bulk cargo transportation system components and the system operation process characteristics are not sufficiently exact because of the lack of statistical data. Anyway, the obtained evaluation may be a very useful example in simple and quick systems reliability characteristics evaluation, especially during the design and improving the transportation systems operating in ports.
Źródło:: Journal of Polish Safety and Reliability Association; 2009, 1; 179--188
2084-5316
Pojawia się w:: Journal of Polish Safety and Reliability Association
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Bayesian reliability models of Weibull systems: State of the art
Autorzy:: Zaidi, A.
Ould Bouamama, B.
Tagina, M.
Powiązania:: https://bibliotekanauki.pl/articles/330104.pdf
Data publikacji:: 2012
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: modelowanie hierarchiczne
system Weibulla
sieci bayesowskie
diagnostyka uszkodzeń
hierarchical modeling
reliability
Weibull
Bayesian networks
fault diagnosis
Opis:: In the reliability modeling field, we sometimes encounter systems with uncertain structures, and the use of fault trees and reliability diagrams is not possible. To overcome this problem, Bayesian approaches offer a considerable efficiency in this context. This paper introduces recent contributions in the field of reliability modeling with the Bayesian network approach. Bayesian reliability models are applied to systems with Weibull distribution of failure. To achieve the formulation of the reliability model, Bayesian estimation of Weibull parameters and the model's goodness-of-fit are evoked. The advantages of this modelling approach are presented in the case of systems with an unknown reliability structure, those with a common cause of failures and redundant ones. Finally, we raise the issue of the use of BNs in the fault diagnosis area.
Źródło:: International Journal of Applied Mathematics and Computer Science; 2012, 22, 3; 585-600
1641-876X
2083-8492
Pojawia się w:: International Journal of Applied Mathematics and Computer Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Possibility of estimating the reliability of diesel engines by applying the theory of semi-Markov processes and making operational decisions by considering reliability of diagnosis on technical state of this sort of combustion engines
Możliwość oszacowania niezawodności silników o zapłonie samoczynnym z zastosowaniem teorii procesów semi-Markowa oraz podejmowania decyzji eksploatacyjnych z uwzględnieniem wiarygodności diagnozy o stanie technicznym tego rodzaju silników spalinowych
Autorzy:: Girtler, J.
Powiązania:: https://bibliotekanauki.pl/articles/134152.pdf
Data publikacji:: 2015
Wydawca:: Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:: diagnostics
reliability
semi-Markov process
diesel engine
statistics
diagnosed system
diagnosing system
diagnostic system
osady wewnętrzne we wtryskiwaczach paliwa
silniki z zapłonem samoczynnym
układ wtrysku paliwa
Opis:: The paper presents semi-Markov models of technical state transitions for diesel engines, useful for determining the reliability of engines. A possibility of application of a three-state model with a simplified matrix function, or even a two-state model, to determine reliability of the engines, has been described herein on examples of known from literature semi-Markov models, for the case when appropriate diagnosing systems (SDG) are used to identify the technical condition of the engines considered as diagnosed systems (SDN). A risk function and a renewal (restitution) function have been proposed for developing a two-state model of engine state transitions. An opportunity for considering the reliability of diagnosis for making operational decisions by applying the statistical decision theory, has also been presented. Conditional probability P(s_i/K_i) is recognized as a measure of reliability of diagnosis.
W artykule przestawiono semimarkowskie modele zmian stanów technicznych silników o zapłonie samoczynnym, przydatne do określenia niezawodności tych silników. Wykazano, na przykładzie znanych z literatury modeli semimarkowskich, że do określenia niezawodności tych silników możliwe jest zastosowanie modelu trójstanowego o uproszczonej macierzy funkcyjnej, a nawet modelu dwustanowego, przy zastosowaniu odpowiednich systemów diagnozujących (SDG) do identyfikacji stanu technicznego wspomnianych silników jako systemów diagnozowanych (SDN). Do opracowania dwustanowego modelu zmian stanów silników zaproponowano wykorzystanie funkcji ryzyka i funkcji intensywności odnowy (restytucji). Przedstawiono także możliwość uwzględnienia wiarygodności diagnozy przy podejmowaniu decyzji eksploatacyjnych w sytuacji zastosowania statystycznej teorii decyzji. Za miarę wiarygodności diagnozy przyjęto prawdopodobieństwo warunkowe P(s_i/K_i).
Źródło:: Combustion Engines; 2015, 54, 4; 57-66
2300-9896
2658-1442
Pojawia się w:: Combustion Engines
Dostawca treści:: Biblioteka Nauki

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