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Wyszukujesz frazę "reliability," wg kryterium: Temat


Tytuł:
Assessment of reliability implementation in manufacturing enterprises
Autorzy:
Haase, F. V.
Woll, R.
Powiązania:
https://bibliotekanauki.pl/articles/407231.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
reliability management
reliability program
reliability method
manufacturing sector
reliability capability
Opis:
Purpose: The increasing internationalization of markets make the creation of competitive advantages more difficult. Companies have to be faster, better and more economical than their competitors in order to survive. Reliable products offer the capability to develop competitive advantages. To achieve the reliability objectives, a systematic approach of reliability actions and supporting methods is necessary. The integration of reliability activities into companies with regard to company size and industry has not been quantitatively determined. Methodology: An international survey drawing upon literature was applied. Evaluations are based on descriptive and inductive statistics. Results: The empirical study reveals reasons for applying reliability management in industry, the extent of applied reliability methods and performed reliability actions to achieve reliability objectives and used reliability data. The results are differentiated according to company size and industry. Research implications: The results of this study are applicable to companies which have already dealt with reliability issues. Further studies should consider a cross-section status of reliability implementation in industry, as well as they should contain extended actions and methods of reliability. Value of paper: This research relates to the status of reliability management implementation in international industry. There are shown significant differences in industries and company size. The results show potentials in reliability management and can be used as benchmark.
Źródło:
Management and Production Engineering Review; 2016, 7, 2; 12-20
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis and comparison of reliability measures of critical points
Autorzy:
Woch, M.
Powiązania:
https://bibliotekanauki.pl/articles/2069436.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
reliability
critical points
reliability index
Opis:
In this work, algorithms have been used to compare the reliability measure of helicopter structure critical points. Reliability index, Cornell’s reliability index and Hasofer-Lind’s reliability index have been calculated and analysed. Inputs to the algorithms, stress and strength were generated by using the Markov chain model based on actual flight records of helicopters. With this approach, results of methods for determining the reliability of critical points of a helicopter’s structure are properly founded.
Źródło:
Journal of Polish Safety and Reliability Association; 2012, 3, 1; 53--58
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On asymptotic approach to reliability improvement of multi-state systems with components quantitative and qualitative redundancy : „m out of n” systems
Autorzy:
Kwiatuszewska-Sarnecka, B.
Powiązania:
https://bibliotekanauki.pl/articles/2069609.pdf
Data publikacji:
2007
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
reliability improvement
limit reliability function
Opis:
The paper is composed of two parts, in this part the multi-state homogeneous „m out of n” systems with reserve components are defined and their multi-state limit reliability functions are determined. In order to improve of the reliability of these systems the following methods are used: (i) a warm duplication of components, (ii) a cold duplication of components, (iii) a mixed duplication of components, (iv) improving the reliability of components by reducing their failure rate. Next, the effects of the systems’ reliability different improvements are compared.
Źródło:
Journal of Polish Safety and Reliability Association; 2007, 2; 265--277
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Miary niezawodnościwej i strukturalnej istotności elementów
Measures of reliability and relevance of the structural elements
Autorzy:
Załęska-Fornal, A.
Powiązania:
https://bibliotekanauki.pl/articles/223148.pdf
Data publikacji:
2006
Wydawca:
Akademia Marynarki Wojennej. Wydział Dowodzenia i Operacji Morskich
Tematy:
niezawodność
systemy niezawodności
reliability
systems reliability
Opis:
W artykule zdefiniowano i wyznaczono strukturalną i niezawodnościową istotność elementów dla obiektów o różnych strukturach niezawodnościowych. Zdefiniowano także istotność zdarzeń bazowych w drzewach zdarzeń (uszkodzeń).
The paper defines and determines the structural importance of the components for the systems of various structures. It also defines the reliability importance of the components for some structures of systems and the event tree importance of the basic events. Some illustrating examples are presented.
Źródło:
Zeszyty Naukowe Akademii Marynarki Wojennej; 2006, R. 47 nr 3 (166), 3 (166); 137-150
0860-889X
Pojawia się w:
Zeszyty Naukowe Akademii Marynarki Wojennej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Niezawodność człowieka i niezawodność techniczna w procesie pracy układu człowiek-maszyna
Human reliability and technical reliability in the work process of the man-machine system
Autorzy:
Ignac-Nowicka, J.
Gembalska-Kwiecień, A.
Powiązania:
https://bibliotekanauki.pl/articles/113367.pdf
Data publikacji:
2014
Wydawca:
STE GROUP
Tematy:
niezawodność człowieka
niezawodność techniczna
wskaźniki niezawodności
human reliability
technical reliability
reliability indicators
Opis:
Artykuł przedstawia próbę syntezy metod oceny niezawodności człowieka z metodami oceny niezawodności obiektu technicznego w układzie człowiek-maszyna. W opracowaniu przedstawiono wskaźniki niezawodności człowieka proponowane przez psychologów jako mierniki prawdopodobieństwa bezbłędnej pracy człowieka. Przedstawiono również propozycję uwzględnienia wskaźników niezawodności człowieka w określeniu niezawodności układu człowiek-maszyna z zastosowaniem opisu matematycznego stosowanego w teorii niezawodności technicznej.
This article presents an attempt of synthesis methods for human reliability assessment and methods for the assessment of the reliability of a technical object in the man-machine system. The paper presents indicators of human reliability proposed by psychologists as measures of the probability of human error-free operation. Also presented a proposal to take into account indicators of human reliability in determining the reliability of the human-machine system using mathematical description used in the theory of technical reliability.
Źródło:
Systemy Wspomagania w Inżynierii Produkcji; 2014, 2 (8); 65-75
2391-9361
Pojawia się w:
Systemy Wspomagania w Inżynierii Produkcji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reliability and risk function improvement of bulk cargo transportation system
Autorzy:
Kwiatuszewska-Sarnecka, B.
Powiązania:
https://bibliotekanauki.pl/articles/2069059.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
reliability
reliability improvement
multistate system
large system
Opis:
In the paper the basic notions of the ageing multistate systems reliability analysis are introduced. The multistate system reliability functions are defined and the mean values of the multistate system lifetimes in the reliability state subsets and in the particular reliability states are determined. The notion of the multistate system risk function and the moment of the system exceeding the critical reliability state are introduced. Further, in the developed reliability models, it is assumed that the system’s components have the multistate Weibull reliability functions with various parameters in their different reliability state subsets. Under this assumption, the proposed multistate system reliability models are applied in maritime transport to the reliability analysis of a bulk cargo transportation system and its reliability function, moreover other main characteristics are determined.
Źródło:
Journal of Polish Safety and Reliability Association; 2015, 6, 2; 81--88
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Proposal of content maintenance of cnc machine using methods of reliability centered maintenance
Autorzy:
Stuchlý, Vladimír
Poprocký, Roman
Čuboňová, Nadežda
Kuric, Ivan
Powiązania:
https://bibliotekanauki.pl/articles/103003.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
maintenance
reliability
reliability centered maintenance
konserwacja
niezawodność
Opis:
The paper presents the results of examination of the proposal content and the scope of maintenance of the machining center MCFV 1050 Basic through the RCM II - Reliability Centered Maintenance method. Based on the analysis of apriori and parametric reliability methods, it was decided to use the FMEA for analyze the causes and consequences of failure states using the software IQ-RM PRO 6. The structure, defined functions and fault functions were developed.The analyzed types of failure and types of maintenance tasks were processed in the RCM II Information and Decision Making Reports.The result is 10 proposed maintenance tasks performed in time intervals, 8 maintenance tasks performed as needed and 1 maintenance task performed after the specified performance.The end of the article discusses the suitability of the applied methods for the maintenance proposal and of the defined recommendations.
Źródło:
Advances in Science and Technology. Research Journal; 2018, 12, 3; 126-133
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimating Reliability Characteristics for Homogeneous and Heterogeneous Systems
Autorzy:
Wesołowski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/93049.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach
Tematy:
reliability of systems
reliability characteristics
stochastic simulation
Opis:
The paper presents a method for estimating reliability characteristics dedicated for two important kinds of systems, i.e. homogeneous systems and heterogeneous systems. We propose an algorithm for evaluating these characteristics on the basis of observations. The paper gives examples of applications of the method for evaluating the reliability of a distributed system.
Źródło:
Studia Informatica : systems and information technology; 2014, 1-2(18); 47-59
1731-2264
Pojawia się w:
Studia Informatica : systems and information technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reliability of large three-dimensional nanosystems
Autorzy:
Kołowrocki, K.
Torbicki, M.
Powiązania:
https://bibliotekanauki.pl/articles/2069333.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
reliability
nanosystem
asymptotic approach
limit reliability function
Opis:
Basic notions and agreements on reliability of three-dimensional nanosystems are introduced. The asymptotic approach to the three-dimensional nanosystem reliability investigation is presented and the nanosystem limit reliability function is defined. Auxiliary theorems on limit reliability functions of three-dimensional nanosystems composed of large number of independent nanocomponents are formulated and the classes of limit reliability functions for a homogeneous series and series-parallel nanosystems are fixed. A model of a three-dimensional series and series-parallel nanosystem with dependent nanocomponents is created and the class of limit reliability functions identical with the class in the previous case is fixed as well. The asymptotic approach to reliability evaluation of exemplary three-dimensonal series and series-parallel nanosystem with dependent nanocomponents is presented and its accuracy is discussed.
Źródło:
Journal of Polish Safety and Reliability Association; 2015, 6, 2; 19--31
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A remark on preventive replacement strategies
Autorzy:
Kopociński, Bolesław
Przybysz, Halina
Powiązania:
https://bibliotekanauki.pl/articles/748785.pdf
Data publikacji:
1979
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Reliability, availability, maintenance, inspection
Applications (reliability, demand theory, etc.)
Reliability and life testing
Opis:
MR0549987
The paper is devoted to the comparison of two preventive replacement strategies anticipating failures of working elements: a cyclic one and one based on the age of the elements. Several classes of reliability functions are considered for which these strategies are shown to be more or less efficient.
Źródło:
Mathematica Applicanda; 1979, 7, 15
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of the reliability of systems
Autorzy:
Dziubdziela, W.
Kopociński, B.
Powiązania:
https://bibliotekanauki.pl/articles/748660.pdf
Data publikacji:
1979
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Reliability, availability, maintenance, inspection
Applications (reliability, demand theory, etc.)
Reliability and life testing
Opis:
MR0549986
The authors survey methods of estimating the reliability of systems under the condition that the probability distributions of survival times of some minimal critical sets of elements are not fully known. The survey includes methods with various degrees of complexity.
Źródło:
Mathematica Applicanda; 1979, 7, 15
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reliability theory
Autorzy:
Janošková, K.
Král, P.
Powiązania:
https://bibliotekanauki.pl/articles/311933.pdf
Data publikacji:
2013
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
teoria niezawodności
inżynieria niezawodności
reliability theory
reliability engineering
Opis:
The contribution deals with the issue of reliability theory and its principles used in the field of reliability engineering. The contribution focuses attention on the mutual linkage among risk engineering, quality engineering and reliability engineering, defines the term of reliability and clarifies reliability theory in general. The article gives an overview of the most frequently used indicators widely used in reliability theory such as probability density of failure occurring, mean and (high) failure rate, mean time between failures, mean time to failure, average life etc. and briefly defines selected reliability systems used in reliability analyses.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2013, 14, 3; 1053-1058
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reliability modelling of complex systems. Part 2
Autorzy:
Kołowrocki, K.
Powiązania:
https://bibliotekanauki.pl/articles/2069591.pdf
Data publikacji:
2007
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
reliability
large system
asymptotic approach
limit reliability function
Opis:
Series-“m out of n” systems and “m out of n”-series systems are defined and exemplary theorems on their limit reliability functions are presented and applied to the reliability evaluation of a piping transportation system and a rope elevator. Applications of the asymptotic approach in large series systems reliability improvement are also presented. The paper is completed by showing the possibility of applying the asymptotic approach to the reliability analysis of large systems placed in their variable operation processes. In this scope, the asymptotic approach to reliability evaluation for a port grain transportation system related to its operation process is performed.
Źródło:
Journal of Polish Safety and Reliability Association; 2007, 2; 231--242
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Examples of series-“m out of k” systems and their limit reliability functions
Autorzy:
Milczek, B.
Powiązania:
https://bibliotekanauki.pl/articles/2069677.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
reliability
large system
asymptotic approach
limit reliability function
Opis:
The paper is concerned with mathematical methods in asymptotic approach to systems reliability analysis. The complexity of the reliability investigation of large-scale systems is proposed to be approximately solved by assuming that the number of system components tends to infinity and finding the limit reliability function of the system. Some general results in the form of auxiliary theorems and examples of limit reliability functions of homogeneous and regular series-“m out of k” systems with exponential and Weibull reliability functions of system components are presented.
Źródło:
Journal of Polish Safety and Reliability Association; 2009, 2; 309--316
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reliability modelling of complex systems. Part 1
Autorzy:
Kołowrocki, K.
Powiązania:
https://bibliotekanauki.pl/articles/2069590.pdf
Data publikacji:
2007
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
reliability
large system
asymptotic approach
limit reliability function
Opis:
The paper is concerned with the application of limit reliability functions to the reliability evaluation of large systems. Two-state large non-repaired systems composed of independent components are considered. The asymptotic approach to the system reliability investigation and the system limit reliability function are defined. Two-state homogeneous series, parallel and series-parallel systems are defined and their exact reliability functions are determined. The classes of limit reliability functions of these systems are presented. The results of the investigation concerned with domains of attraction for the limit reliability functions of the considered systems and the investigation concerned with the reliability of large hierarchical systems as well are discussed in the paper. The paper contains exemplary applications of the presented facts to the reliability evaluation of large technical systems.
Źródło:
Journal of Polish Safety and Reliability Association; 2007, 2; 219--230
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Classes of reliability functions
Autorzy:
KopocińskiI, Bolesław
Powiązania:
https://bibliotekanauki.pl/articles/748186.pdf
Data publikacji:
1983
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Reliability and life testing
Reliability, availability, maintenance, inspection
Opis:
Artykuł nie zawiera streszczenia
The article contains no abstract
Źródło:
Mathematica Applicanda; 1983, 11, 23
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vector Approach to Context Data Reliability
Autorzy:
Tunia, M. A.
Powiązania:
https://bibliotekanauki.pl/articles/106311.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
data reliability
reliability metric
context data
vector approach
context-aware processing
interface reliability
data quality
data source reliability
security level
Opis:
Context-aware processing is a part of intensively developed ubiquitous computing andmobile systems. Surrounding awareness is used to introduce new functions and solutions. Some categories of the context data are taken for security purposes in the context-aware security implementations.This kind of data has to meet some conditions since it is used for decision making about security mechanisms adaptation and configuration. One of these conditions is reliability. The paper presents vector approach to context data reliability assessment introducing mechanism which allows to assess reliability parameters for further usage in context aware security processing. The following aspects of the context data are taken into account: interface reliability, data quality, data source reliability and security level. Introducing reliability metric for context data may be beneficial to other mechanisms which utilize context data. The vector form of reliability may be even more flexible than the scalar value.
Źródło:
Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica; 2014, 14, 2; 60-75
1732-1360
2083-3628
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bayesian networks as knowledge representation system in domain of reliability engineering
Sieci bayesowskie jako system reprezentacji wiedzy w dziedzinie inzynierii niezawodnosci
Autorzy:
Kusz, A.
Maksym, P.
Marciniak, A.W.
Powiązania:
https://bibliotekanauki.pl/articles/793464.pdf
Data publikacji:
2011
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
reliability model
probabilistic network
Bayesian network
knowledge representation
building
reliability analysis
reliability engineering
block diagram
Opis:
The paper presents Bayesian Networks (BNs) in the context of methodological requirements for building knowledge representation systems in the domain of reliability engineering. BNs, by their nature, are especially useful as a formal and computable language for modeling stochastic and epistemic uncertainty intrinsically present in conceptualization and reasoning about reliability.
W artykule przedstawiono sieci bayesowskie (BNs) w kontekście wymogów metodologicznych do budowy systemów reprezentacji wiedzy w dziedzinie inżynierii niezawodności. Ze swej natury, sieci bayesowskie, są szczególnie przydatne jako formalny i obliczalny język do modelowania niepewności stochastycznej i epistemicznej, Takie rodzaje niepewności są istotną cechą konceptualizacji i rozumowania o niezawodność.
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2011, 11C
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Early estimating the number of errors encountered during program testing
Autorzy:
Konopacki, J.
Worwa, K.
Powiązania:
https://bibliotekanauki.pl/articles/305979.pdf
Data publikacji:
2009
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
software testing
software reliability
program correctness
reliability growth model
Opis:
An approach to estimate the number of errors encountered during the program testing process is proposed in the paper. Considerations are based on some program reliability growth model which is constructed for assumed scheme of program testing process. In this model the program under the testing is characterized by means of so-called characteristic matrix and the program testing process is determined by means of so-called testing strategy. The formula for determining the mean value of the predicted number of errors encountered during the program testing is obtained. This formula can be used if the characteristic matrix and the testing strategy are known. Formula for estimating this value when the program characteristic matrix is not known are also proposed in the paper.
Źródło:
Biuletyn Instytutu Systemów Informatycznych; 2009, 3; 53-57
1508-4183
Pojawia się w:
Biuletyn Instytutu Systemów Informatycznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gas turbine reliability model based on tangent hyperbolic reliability function
Autorzy:
Djeddi, A. Z.
Hafaifa, A.
Salam, A.
Powiązania:
https://bibliotekanauki.pl/articles/280120.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
reliability estimation
reliability algorithms
lifetime distribution
Weibull distribution
availability
Opis:
The present work deals with the exploration of a new model proposed for the reliability analysis of industrial production systems. This proposed model is mainly based on the tangent hyperbolic function, where the survival function is determined and used in the lifetime distribution modeling taking into account of estimation the parameters of the proposed function. On the other side, tests validation is performed using the real data of a gas turbine installation. The obtained results allow the modeling of damage effects, hence the prediction of the performance of the examined gas turbine using the proposed model gives good results in terms of validity.
Źródło:
Journal of Theoretical and Applied Mechanics; 2015, 53, 3; 723-730
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Time differences in operation states of “Stena Baltica” ferry during the open water areas passages
Autorzy:
Jurdziński, M.
Guze, S.
Kamiński, P.
Powiązania:
https://bibliotekanauki.pl/articles/2069690.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
navigation
reliability
large system
asymptotic approach
limit reliability function
Opis:
The paper deals with analysis of ships operation states in open water areas effected by environmental constraints influencing on ship sea keeping parameters in application to “Stena Baltica” ferry operated at the Baltic Sea between Gdynia and Karlskrona harbors.
Źródło:
Journal of Polish Safety and Reliability Association; 2009, 1; 171--178
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computational Analysis of Screening Unit of Paper Plant with Human Error Using Neural Network Approach
Autorzy:
Sharma, Neelam
Gupta, Ritu
Batra, C. M.
Ekata, Ekata
Powiązania:
https://bibliotekanauki.pl/articles/1159859.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Neural Network
cost factor
neural weights
non-reliability
reliability
Opis:
Recent approach of Neural Network can be applied to solve a wide range of optimization problems. This paper deals with reliability, non-reliability and profit analysis of a paper plant. The objective of this paper is to compute profit of paper plant using neural network Algorithm and to analyze the availability of the system. The system is divided into four main subsystems. A multi-layered neural network model is used in order to optimize the maintenance of the paper plant system. The system may fail due to hardware failure with human errors and various environmental conditions. All types of failures, repairs and waiting rates are exponential. System state probabilities and other parameters are developed for the proposed model using neural network approach. Numerical examples are included to demonstrate the results.
Źródło:
World Scientific News; 2018, 113; 226-237
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surprises : The warranty, the reliability, and the systemability
Autorzy:
Pham, H.
Powiązania:
https://bibliotekanauki.pl/articles/2069714.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
warranty
reliability
systemability
Opis:
In the fast growing, competitive global market and dynamic environments, we not only depend upon the continued functioning of a wide array of complex machinery and equipment of our everyday safety, security, mobility and economic welfare but also expect our electric appliances, automobile, transportation stations and data exchange systems to perform and perform well wherever and whenever we need them in order to survive. Such expectation is seldom realistic since it eventually breaks down, particularly when the system (or product) nowadays is operating in a complex random operating environment. Strong warranties are becoming more useful tactics for developers to attract potential customers especially due to the slowing economy. This talk discusses the research challenges and trends, and the reflections of the perception between the warranty, the reliability and the systemability.
Źródło:
Journal of Polish Safety and Reliability Association; 2008, 2; 299
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of AIS vessel position report under the aspect of data reliability
Autorzy:
Banyś, P.
Noack, T.
Gewies, S.
Powiązania:
https://bibliotekanauki.pl/articles/320446.pdf
Data publikacji:
2012
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
AIS
data reliability
Opis:
Since its introduction the Automatic Identification System (AIS) has played an important part in improving safety at sea, making bridge watchkeeping duties more comfortable and enhancing vessel traffic management ashore. However the analysis of a AIS data set describing the vessel traffic of the Baltic Sea came to conclusion, that specific parameters with relevance to navigation seemed to be defective or implausible. Essentially, it concerned the true heading (THDG) and the rate of turn (ROT) parameters. With the paper we are trying to clarify, which parameters of the AIS position report and to what extent, are affected. The detailed data analysis gives answers on how reliable the AIS data in different traffic areas is.
Źródło:
Annual of Navigation; 2012, No. 19, part 1; 5-16
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Setting periodic maintenance intervals for diesel engines operated under difficult conditions
Autorzy:
Dobržinskij, N.
Powiązania:
https://bibliotekanauki.pl/articles/348499.pdf
Data publikacji:
2017
Wydawca:
Akademia Wojsk Lądowych imienia generała Tadeusza Kościuszki
Tematy:
engine
reliability
maintenance
Opis:
Afghan highlands, landscape and altitude above the sea level, and geographical situation influence on the climate. Engines’ operation are very different from their work in European plains. Mountainous terrain variability has a significant impact on operation mode of the car’s chassis and transmission, and climate change determines the engine performance parameters. Mentioned factors result in technical performance characteristics and their costs. Defining requirements to preventive measures for technical failure would reduce technical repair costs and rational technical maintenance frequency would save funds for maintenance.
Źródło:
Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki; 2017, 1; 173-188
1731-8157
Pojawia się w:
Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Istota strategii eksploatacji wg kryteriów niezawodności
The essence of the exploitation strategy according to reliability criteria
Autorzy:
Goliasz, Tomasz
Pszczółkowski, Józef
Powiązania:
https://bibliotekanauki.pl/articles/311379.pdf
Data publikacji:
2019
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
eksploatacja
strategia eksploatacji
niezawodność
RCM (Reliability Centered Maintenance)
Reliability
RCM (Reliability Centred Maintenance)
maintenance strategies evolution
Opis:
W artykule scharakteryzowano strategie eksploatacji urządzeń technicznych. Przedstawiono ich ewolucję z uwzględnieniem zmian filozofii i kryteriów eksploatacji. Dokonano analizy strategii eksploatacji według kryteriów niezawodności, możliwości jej stosowania w aspekcie wspierania procesu decyzyjnego eksploatacji sprzętu. Omówiono strategię eksploatacji RCM (Reliability Centered Maintenance), która może być i jest coraz częściej stosowana w procesach utrzymania maszyn oraz w aspekcie realizacji m.in. procesów produkcyjnych w przedsiębiorstwie. Dokonano oceny możliwości stosowania strategii w wojskowym systemie eksploatacji.
The article discusses the strategies for using the equipment. The authors remind the evolution of the development of exploitation strategies. The exploitation strategy according to reliability and the possibilities of its application in the aspect of supporting the decision process of equipment operation is analyzed. The RCM strategy is discussed, which can be successfully applied in the aspect of the reliability of the implementation of, among ot hers, production processes in the enterprise.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2019, 20, 6; 161-167
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena wzrostu niezawodności w bezzałogowym statku latającym podczas kolejnych faz badania w locie
Reliability growth estimation for unmanned aerial vechicle during flight-testing phases
Autorzy:
Yu, Y.
Cui, W.
Song, B.
Wang, S.
Powiązania:
https://bibliotekanauki.pl/articles/301049.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
niezawodność
wzrost niezawodności
badanie wzrostu niezawodności
metoda bayesowska
reliability
reliability growth
reliability growth testing
Bayesian method
Opis:
Samoloty muszą być testowane w locie podczas procesu ich opracowywania i dla zapewnienia niezawodności powinny przejść, podczas faz badania w locie, proces wzrostu niezawodności obejmujący kolejne etapy: testowania, poszukiwania ukrytego uszkodzenia, udoskonalania i ponownego testowania. Jednakże z powodu złożonej budowy samolotów i wysokich kosztów badań w locie, badania wzrostu niezawodności z reguły przeprowadza się na małych próbkach. Trudno jest zatem ocenić wzrost niezawodności w kolejnych fazach badań w locie. W niniejszej pracy do estymacji wzrostu niezawodności zastosowano metodę bayesowską dla dwumianowego wzrostu niezawodności opartą na rozkładzie a priori Dirichleta oraz obliczono parametry rozkładu a posteriori wykorzystując metodę symulacji Markov-Chain Monte Carlo. Metodę zastosowano w kolejnych fazach badań w locie bezzałogowego statku latającego (Unmanned Aerial Vehicle), a użyty przykład pokazuje, iż metoda oparta na rozkładzie a priori Dirichleta może skrócić czas badań w locie. Parametry rozkładu a priori łatwo jest potwierdzić na podstawie uprzednio znanych informacji. Proponowana metoda nadaje się do oceny badań wzrostu niezawodności podczas kolejnych etapów badań w locie.
It is necessary for airplanes to be fl ight-tested during the development process, and they should pass the testing/failurefi nding/improvement/re-testing reliability growth process during the fl ight-testing phases to ensure its reliability. However, due to airplane complexity and the high costs of fl ight-testing, the reliability growth testing is usually done with small samples. It is thus diffi cult to estimate the reliability growth during the fl ight-testing phases. In this paper, Bayesian method for binomial reliability growth based on the Dirichlet prior distribution is applied to reliability growth estimation, and the parameters of the posterior distribution are calculated by using the simulation method of Markov-Chain Monte Carlo. The method is applied to the Unmanned Aerial Vehicle test fl ight phases, and the example shows that the method based on the Dirichlet prior distribution can save the fl ight-testing time. It is easy to confi rm the parameters of the prior distribution by using the prior information. The proposed method is suitable for reliability growth testing estimation during fl ight-testing stages.
Źródło:
Eksploatacja i Niezawodność; 2010, 2; 43-47
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Smart grid condition assessment: concepts, benefits and developments
Autorzy:
Refaat, S. S.
Abu-Rub, H.
Powiązania:
https://bibliotekanauki.pl/articles/1193267.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
condition assessment
smart grid
electric grid reliability
smart grid reliability
Opis:
Power delivery infrastructures are overstrained and suffer from overaged conditions, not only in the developed, but also in the more industrialized countries. The aim of the smart grid is to provide a more reliable and efficient electric power grid. Condition assessment is an essential and effective part of the reliability for electric grid components; also, it reflects the physical state of the electricity asset in a generation, transmission, distribution, and consumers sides. In this paper, condition assessment of electric grid assets will be discussed and illustrated within the context of smart grid principle. In addition, the proposed condition assessment architecture and the objective of condition assessment for smart grid equipment will be explored and analyzed. Moreover, the potential benefits of such smart system as compared to the traditional power system will be presented. This paper aims to add significant contribution to a smart grid theory.
Źródło:
Power Electronics and Drives; 2016, 1, 36/2; 147-163
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uncertainty propagation in structural reliability with implicit limit state functions under aleatory and epistemic uncertainties
Autorzy:
Zhou, Shuang
Zhang, Jianguo
You, Lingfei
Zhang, Qingyuan
Powiązania:
https://bibliotekanauki.pl/articles/1841668.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
structural reliability
uncertainty quantification
uncertainty propagation
reliability index
uncertainty theory
Opis:
Uncertainty propagation plays a pivotal role in structural reliability assessment. This paper introduces a novel uncertainty propagation method for structural reliability under different knowledge stages based on probability theory, uncertainty theory and chance theory. Firstly, a surrogate model combining the uniform design and least-squares method is presented to simulate the implicit limit state function with random and uncertain variables. Then, a novel quantification method based on chance theory is derived herein, to calculate the structural reliability under mixed aleatory and epistemic uncertainties. The concepts of chance reliability and chance reliability index (CRI) are defined to show the reliable degree of structure. Besides, the selection principles of uncertainty propagation types and the corresponding reliability estimation methods are given according to the different knowledge stages. The proposed methods are finally applied in a practical structural reliability problem, which illustrates the effectiveness and advantages of the techniques presented in this work.
Źródło:
Eksploatacja i Niezawodność; 2021, 23, 2; 231-241
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of component failures dependency influence on system lifetime
Autorzy:
Blokus-Roszkowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/2069617.pdf
Data publikacji:
2007
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
component failure dependency
reliability characteristics
limit reliability function
transportation system
Opis:
In the paper the results of the reliability investigation of multi-state homogeneous parallel-series systems with independent and dependent components are presented. The multi-state reliability functions of such systems and other reliability characteristics in both cases are determined under the assumption that their components have exponential reliability function. Moreover the asymptotic approach to the reliability evaluation of these systems is also presented and the classes of limit reliability functions for the considered systems in both cases are fixed. Finally, the presented theoretical results are applied to the reliability evaluation of the shipyard rope transportation system. The comparison of the multi-state exact and limit reliability functions of the considered transportation system under the assumption that its components are independent and under the assumption that its components have failure dependency is performed and illustrated graphically.
Źródło:
Journal of Polish Safety and Reliability Association; 2007, 1; 17--27
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reliability of Power Units in Poland and the World
Niezawodność bloków energetycznych w Polsce i na świecie
Autorzy:
Paska, J.
Powiązania:
https://bibliotekanauki.pl/articles/397418.pdf
Data publikacji:
2015
Wydawca:
ENERGA
Tematy:
reliability
reliability indices
power unit
niezawodność
blok energetyczny
wskaźnik niezawodności
Opis:
One of a  power system’s subsystems is the generation subsystem consisting of power units, the reliability of which to  a  large extent determines the reliability of the power system and electricity supply to  consumers. This paper presents definitions of the basic indices of power unit reliability used in Poland and in the world. They are compared and analysed on the basis of data published by the Energy Market Agency (Poland), NERC (North American Electric Reliability Corporation – USA), and WEC (World Energy Council). Deficiencies and the lack of a unified national system for collecting and processing electric power equipment unavailability data are also indicated.
Jednym z podsystemów systemu elektroenergetycznego jest podsystem wytwórczy, złożony z bloków energetycznych, których niezawodność determinuje w dużym stopniu niezawodność systemu elektroenergetycznego i pewność zasilania energią elektryczną odbiorców. W artykule przedstawiono definicje podstawowych wskaźników niezawodności bloków energetycznych, stosowanych w Polsce i na świecie. Dokonano porównania i analizy ich wartości na podstawie danych publikowanych przez Agencję Rynku Energii (Polska), NERC (Północnoamerykańska Korporacja ds. Niezawodności w Elektroenergetyce – USA) i WEC (Światowa Rada Energetyczna). Zasygnalizowano również niedostatki i brak jednolitego krajowego systemu zbierania i przetwarzania danych o awaryjności urządzeń elektroenergetycznych.
Źródło:
Acta Energetica; 2015, 3; 59-70
2300-3022
Pojawia się w:
Acta Energetica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Niezawodność bloków energetycznych w Polsce i na świecie
Reliability of power generating units in Poland and in the world
Autorzy:
Paska, J.
Powiązania:
https://bibliotekanauki.pl/articles/267189.pdf
Data publikacji:
2015
Wydawca:
Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Tematy:
niezawodność
bloki energetyczne
wskaźniki niezawodności
reliability
power generating unit
reliability indices
Opis:
Jednym z podsystemów systemu elektroenergetycznego jest podsystem wytwórczy, złożony z bloków energetycznych, których niezawodność determinuje w dużym stopniu niezawodność systemu elektroenergetycznego i pewność zasilania energią elektryczną odbiorców. W artykule przedstawiono definicje podstawowych wskaźniki niezawodności bloków energetycznych, stosowane w Polsce i na świecie. Dokonano porównania i analizy ich wartości na podstawie danych publikowanych przez Agencję Rynku Energii (Polska), GADS (NERC – Północnoamerykańska Rada ds. Niezawodności w Elektroenergetyce) i WEC (Światowa Rada Energetyczna). Zasygnalizowano również niedostatki i brak jednolitego krajowego systemu zbierania i przetwarzania danych o awaryjności urządzeń elektroenergetycznych.
One of the sub-systems of the electric power system is a generation subsystem, consisting of power generating units, the reliability of which largely determines the reliability of the power system and electric power supply reliability of the customers. The article presents the definitions of basic indicators of reliability of power generating units used in Poland and abroad. A comparison and analysis of their values on the basis of data published by the Energy Market Agency (Poland), GADS (NERC - North American Electric Reliability Council) and WEC (World Energy Council) were done. Also deficiencies and lack of a uniform national system of data collection and processing of electrical power equipment failures were indicated.
Źródło:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2015, 42; 31-34
1425-5766
2353-1290
Pojawia się w:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selection of vehicles for fleet of transport company on the basis of observation of their operational reliability
Autorzy:
Dziubak, Tadeusz
Wysocki, Tadeusz
Dziubak, Sebastian
Powiązania:
https://bibliotekanauki.pl/articles/1841760.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
exploitation
light commercial vehicles
exploitation reliability
indices of operational reliability evaluation
Opis:
The exploitation reliability of the contemporary light commercial vehicles of four makes is subject to a quantitative analysis in the article. The issue concerning the quantitative evaluation of the operational reliability of the fleet of the commercial vehicles in the transport company and their selection for this fleet is not very numerously described in the literature. For the purposes of evaluating the operational reliability, results of monitoring failures of 115 vehicles during their several years of exploitation in the similar conditions in the urban area and its surroundings were used. A proposed test method uses the relative quantitative measures of the operational reliability indices targeted at the mileage of vehicles and frequency of the failures. The aforementioned enabled to identify the make of the vehicles, which during exploitation was characterized by the lowest failure frequency and thus reliability. This, in turn, allowed for a favorable selection of the vehicles within the next years of the operation of the company. The results of the study confirmed the possibility of using the proposed method to evaluate the operational reliability of the commercial vehicles in any transport company.
Źródło:
Eksploatacja i Niezawodność; 2021, 23, 1; 184-194
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Belief reliability-based design optimization method with quantile index under epistemic uncertainty
Autorzy:
Chen, Yubing
Wen, Meilin
Zhang, Qingyuan
Kang, Rui
Powiązania:
https://bibliotekanauki.pl/articles/24200835.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
belief reliability
reliability design optimization
epistemic uncertainty
quantile index
uncertainty theory
Opis:
Product reliability design optimization is affected by epistemic uncertainty greatly, which leaves significant risks in product use. In this paper, a new belief reliability-based design optimization (BRBDO) method under epistemic uncertainty is established to handle this problem. First, the belief reliability theory is introduced into the design optimization problem, and a quantile index is proposed to quantify belief reliability level based on uncertainty theory, through which a rapid analysis method called first order belief reliability analysis (FOBRA) method is developed. Then, according to the different trade-off strategies, two types of design optimization models are established, and corresponding FOBRA-based computation methods are also demonstrated. Finally, several case applications are studied to verify the effectiveness of the analysis and design optimization methods proposed in this paper. The results indicate that the BRODO method with the quantile index can save a lot of computational time with acceptable accuracy and can rationally cope with epistemic uncertainty.
Źródło:
Eksploatacja i Niezawodność; 2023, 25, 2; art. no. 163545
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reliability concept under general uncertainty
Autorzy:
Guo, R.
Cui, Y.
Thiart, C.
Guo, D.
Powiązania:
https://bibliotekanauki.pl/articles/2069525.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
probabilistic reliability
uncertain reliability
uncertain measure
uncertainty lifetime
uncertain hazard function
Opis:
The Toyota crisis is tearing off the brand image of quality and reliability and therefore it is logical to question whether the dominating position of probability theory, on which Japanese quality and reliability engineering practices are established, should be examined. In general, reliability analysis is an exercise under uncertain environment. Foundationally speaking, uncertain modeling is a matter of choosing what kind of uncertain measure as its standing point. In this paper, we introduce the uncertainty reliability concept on the platform of the axiomatic uncertain measure theory and compare it to probabilistic reliability concept based on Kolmogorov’s probability measure theory, on which the traditional quality and reliability engineering is established. It is expecting that a foundational work can be established for a more rigorous reliability engineering and risk analysis under general uncertainty environments.
Źródło:
Journal of Polish Safety and Reliability Association; 2010, 1, 1; 105--114
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selection of vehicles for fleet of transport company on the basis of observation of their operational reliability
Autorzy:
Dziubak, Tadeusz
Wysocki, Tadeusz
Dziubak, Sebastian
Powiązania:
https://bibliotekanauki.pl/articles/1841788.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
exploitation
light commercial vehicles
exploitation reliability
indices of operational reliability evaluation
Opis:
The exploitation reliability of the contemporary light commercial vehicles of four makes is subject to a quantitative analysis in the article. The issue concerning the quantitative evaluation of the operational reliability of the fleet of the commercial vehicles in the transport company and their selection for this fleet is not very numerously described in the literature. For the purposes of evaluating the operational reliability, results of monitoring failures of 115 vehicles during their several years of exploitation in the similar conditions in the urban area and its surroundings were used. A proposed test method uses the relative quantitative measures of the operational reliability indices targeted at the mileage of vehicles and frequency of the failures. The aforementioned enabled to identify the make of the vehicles, which during exploitation was characterized by the lowest failure frequency and thus reliability. This, in turn, allowed for a favorable selection of the vehicles within the next years of the operation of the company. The results of the study confirmed the possibility of using the proposed method to evaluate the operational reliability of the commercial vehicles in any transport company.
Źródło:
Eksploatacja i Niezawodność; 2021, 23, 1; 184-194
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Testing the integrated package of tools supporting decision making on identification, prediction and optimization of complex technical systems operation, reliability and safety. Part 3. IS&RDSS Application – Exemplary system operation and reliability characteristics prediction
Autorzy:
Kołowrocki, K.
Soszyńska-Budny, J.
Ng, K. M.
Powiązania:
https://bibliotekanauki.pl/articles/2069505.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
reliability
operation process
prediction
Opis:
There is presented the IS&RDSS application to the operation and reliability of an exemplary complex technical system prediction. There are performed, the unconditional mean sojourn times and the limit transient probabilities of the exemplary system operation process at the particular operation states evaluations. The evaluations of the exemplary system unconditional multistate reliability function, the expected values and the standard deviations of its unconditional lifetimes in the reliability state subsets and the mean values of its lifetimes in the particular reliability states are performed as well. Moreover, in the case when the system is repairable, its renewal and availability characteristics are estimated.
Źródło:
Journal of Polish Safety and Reliability Association; 2011, 2, 2; 387--398
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Testing the integrated package of tools supporting decision making on identification, prediction and optimization of complex technical systems operation, reliability and safety. Part 5. IS&RDSS Application – Improved exemplary system operation and reliability characteristics prediction
Autorzy:
Kołowrocki, K.
Soszyńska-Budny, J.
Xie, M.
Powiązania:
https://bibliotekanauki.pl/articles/2069537.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
complex system
reliability
improve
Opis:
There is presented the IS&RDSS application to the reliability of the improved exemplary complex technical system prediction. There are considered three ways of the exemplary system reliability improvement, a hot single reservation of its components, a cold single reservation of its components and replacing its components by the improved components with reduced intensities of departure from the reliability state subsets. The evaluations of this ways improved exemplary system unconditional multistate reliability function, the expected values and the standard deviations of its unconditional lifetimes in the reliability state subsets and the mean values of its lifetimes in the particular reliability states are performed. Moreover, in the case when the improved system is repairable, its renewal and availability characteristics are estimated.
Źródło:
Journal of Polish Safety and Reliability Association; 2011, 2, 2; 407--434
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Testing the integrated package of tools supporting decision making on identification, prediction and optimization of complex technical systems operation, reliability and safety. Part 4. IS&RDSS Application – Exemplary system operation and reliability optimization
Autorzy:
Kołowrocki, K.
Soszyńska-Budny, J.
Xie, M.
Powiązania:
https://bibliotekanauki.pl/articles/2069544.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
reliability
operation process
optimization
Opis:
There is presented the IS&RDSS application to the operation and reliability of an exemplary complex technical system optimization. There are determined, the optimal limit transient probabilities of the exemplary system operation process at the particular operation states maximizing the system lifetime in the reliability states not worse than the critical reliability state and its optimal sojourn times at the particular operation states. There are evaluated the exemplary system optimal unconditional multistate reliability function, the optimal expected values and the standard deviations of its unconditional lifetimes in the reliability state subsets and the optimal mean values of its lifetimes in the particular reliability states are. Moreover, in the case when the system is repairable, its optimal renewal and availability characteristics are found.
Źródło:
Journal of Polish Safety and Reliability Association; 2011, 2, 2; 399--406
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The model of reusability of series system product
Autorzy:
Jodejko-Pietruczuk, A.
Plewa, M.
Powiązania:
https://bibliotekanauki.pl/articles/2069628.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
reliability
reverse logistics
reuse
Opis:
The main goal of this paper is to create the reverse logistics model that uses reliability theory to describe reusability of product parts with assumption that recovered components are used in production process but they aren’t as good as new ones. The model allows to estimate the potential profits of the reusing policy in a production and gives the base to optimize some of the process parameters: the threshold work time of returns or the warranty period for products containing reused elements.
Źródło:
Journal of Polish Safety and Reliability Association; 2011, 2, 1; 129--136
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of the reliability function for an object that is improved on the basis of data on the life-lengths and types of failures of an object that is not improved
Autorzy:
Domsta, Joachim
Powiązania:
https://bibliotekanauki.pl/articles/747367.pdf
Data publikacji:
1983
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Reliability and life testing
Opis:
W pracy podaje się twierdzenia, które mogą być podstawą do oszacowania(zgodnie z zasadami statystyki matematycznej) funkcji niezawodności obiektu poprawionego. Korzysta się przy tym z danych o obiekcie przed jego poprawieniem. Wyrózniono dwa rodzaje metod poprawiania: -przez selekcję, -przez uszlachetnienie. Omówiono niektóre interpretacje rozważanych modeli.
The author considers a population Π of devices which can fail due to one of the modes of failure Ui, i=1,2,...,k. Assume that each device e in Π has a life which will terminate at time T(e) due to mode Uj. When a device is drawn at random from Π, the pair [T(e),j] is a two-dimensional random variable with probability distribution P(T,j) which determines the marginal survival function R(t)=P{T>t}, called the "reliability function before improvement". The author discusses possible improvement of such a population by procedures of two types. Type I consists of removing from Π all devices with certain unfavorable qualities, for example, those that fail due to Uj within a test period tj for specified j and tj, or those for which one can tell beforehand that they will fail due to a specified Uj. Type II consists of modifying the devices (e.g., by changing the manufacturing process) in a way that will change the probability distribution P(T,j) into some P~(T,j). In view of the multiplicity of modes of failure, this leads to questions dealing with competing risks.
Źródło:
Mathematica Applicanda; 1983, 11, 22
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On a class of limit reliability functions of some regular homogeneous series-parallel systems
Autorzy:
Kołowrocki, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/747647.pdf
Data publikacji:
1993
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Reliability and life testing
Opis:
.
In the investigation of large-scale systems the problem of the complexity of their reliability functions arises. This problem may be solved approximately by assuming that the number of system components tends to infinity and finding the limit reliability function. In this paper a four-element class of limit reliability functions for a regular homogeneous series-parallel system is presented. The number of series components of the system has the order of the logarithm of the number of its parallel components. The result is obtained under the assumption that the lifetimes of the particular components are independent and identically distributed random variables. The class presented is different from the known class of limit distributions of minimax statistics of independent random variables with the same distribution. Moreover, some examples of the systems considered and their limit reliability functions are given. The results can be useful in the investigation of the reliability of large systems.
Źródło:
Mathematica Applicanda; 1993, 22, 36
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On a systematic approach to development of maintenance plans for production equipment
Autorzy:
Mikler, J.
Frangoudis, C.
Lindberg, B.
Powiązania:
https://bibliotekanauki.pl/articles/99615.pdf
Data publikacji:
2011
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
reliability
maintenance
RCM
TRIZ
Opis:
Reliability is a collective term covering several abilities of the technical system: to deliver required functions, to uphold quality of products and services, to assure that the safety requirements associated with the system are properly fulfilled with regards both to the users and the environment and finally to uphold the durability of the technical system during its whole life cycle. All this has to be performed at acceptable risks, optimal cost, and correspond to operational needs of the business. Even though there is an advanced, well thought-out concept for this purpose - reliability centred maintenance (RCM) - that correctly applied might result in very good quality maintenance programs, it is not broadly used in the industry due to the vast efforts required for its implementation. An appropriate methodology supporting systematic functional break down of a studied systems, and guidelines how to couple functional failures to failure modes, integrated with RCM, would greatly speed up generating of effective maintenance programs. In this paper we present our research towards development of such a methodology, and show a pilot implementation to analysis of machine tool spindle. The methodology is based on Hubka's theory of design and AFD/TRIZ.
Źródło:
Journal of Machine Engineering; 2011, 11, No. 1-2; 87-101
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reliability modelling of water distribution system (WDS) for operation and maintenance needs
Autorzy:
Kwietniewski, M.
Powiązania:
https://bibliotekanauki.pl/articles/241466.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Tematy:
reliability
water distribution
modeling
Opis:
From the point of view of enterprises dealing with WDS operation and maintenance, parameter assessment of reliability of WDS functioning is one of the basics for the assessment of the quality of water-supply services afforded by enterprises. To make reliability assessment possible, a two-state model of WDS reliability has been proposed. The basic parameter of this model is the probability of satisfactory performance of the system as a function of its reliability. Other, no less important parameters characterizing the model are probability of part fault state, intensity of occurrence of part fault states, average time of satisfactory performance state and average time of part fault state of the system. The model has been used to estimate the function of a definite WDS reliability on the basis of operational research of reliability during 3years of its functioning.
Źródło:
Archives of Hydro-Engineering and Environmental Mechanics; 2004, 51, 1; 85-92
1231-3726
Pojawia się w:
Archives of Hydro-Engineering and Environmental Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On System Reliability of Increasing multi-state linear k-within-(m,s)-of-(m,n):F lattice system
Zwiększanie niezawodności wielostanowych systemów liniowych typu k-w- (m,s) -z- (m,n):F o strukturze kratowej
Autorzy:
Taha, R.
Powiązania:
https://bibliotekanauki.pl/articles/300816.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
network reliability
reliability engineering
structural reliability
system failure modelling
reliability optimization
probabilistic methods
niezawodność sieci
inżynieria niezawodności
niezawodność konstrukcyjna
modelowanie uszkodzeń systemu
optymalizacja niezawodności
metody probabilistyczne
Opis:
A "multi-state linear k-within-(m,s)-of-(m,n):F lattice system" (MS L(k,m,s,n:F)) comprises of m×n components, which are ordered in m rows and n columns. The state of system and components may be one of the following states: 0, 1, 2, …, H. The state of MS L(k,m,s,n:F) is less than j whenever there is at least one sub-matrix of the size m×s which contains kl or more components that are in state less than l for all j ≤ l ≤ H. This system is a model for many applications, for example, tele communication, radar detection, oil pipeline, mobile communications, inspection procedures and series of microwave towers systems. In this paper, we propose new bounds of increasing MS L(k,m,s,n:F) reliability using second and third orders of Boole-Bonferroni bounds with i.i.d components. The new bounds are examined by previously published numerical examples for some special cases of increasing MS L(k,m,s,n:F). Also, illustration examples of modelling the system and numerical examples of new bounds are presented. Further, comparisons between the results of second and third orders of Boole-Bonferroni bounds are given.
"Wielostanowy system liniowy k-w- ( m, s ) -z- ( m, n ):F o strukturze kratowej" (MS L(k, m, s, n:F)) składa się z m × n elementów, uporządkowanych w m wierszach i n kolumnach. Stan systemu i elementów może być jednym z następujących stanów: 0, 1, 2, ..., H. Stan MS L (k, m, s, n: F) jest mniejszy niż j, gdy istnieje co najmniej jedna pod-matryca o rozmiarze m × s, która zawiera kl lub więcej elementów, które znajdują się w stanie mniejszym niż l dla wszystkich j ≤ l ≤ H. System ten stanowi model dla wielu zastosowań, na przykład w telekomunikacji, detekcji radarowej, rurociągach naftowych, komunikacji mobilnej, procedurach przeglądu oraz systemach wież radiolinii. W niniejszym artykule proponujemy nowe granice zwiększania niezawodności MS L ( k, m, s, n: F) z wykorzystaniem drugiego i trzeciego stopnia nierówności Boole'a–Bonferroniego z niezależnymi elementami o jednakowym rozkładzie. Nowe granice omówiono na podstawie poprzednio publikowanych przykładów numerycznych dla niektórych szczególnych przypadków zwiększania MS L ( k, m, s, n: F). Przedstawiono także przykłady ilustrujące modelowanie systemu oraz numeryczne przykłady nowych granic. Ponadto porównano wyniki uzyskane dla drugiego i trzeciego stopnia nierówności Boole'a–Bonferroniego.
Źródło:
Eksploatacja i Niezawodność; 2018, 20, 1; 73-82
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An optimal preventive maintenance policy of parallel-series systems
Autorzy:
Duarte, J. C.
Craveiro, J. T.
Trigo, T. P.
Powiązania:
https://bibliotekanauki.pl/articles/2069373.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
reliability
availability
maintenance optimization
Opis:
This paper presents an algorithm to solve the problem of maintenance management of a two state parallel-series system based on preventive maintenance over the different system components. It is assumed that all components of the system exhibit Weibull hazard function and constant repair rate and that preventive maintenance would bring the system to the as good as new condition. The algorithm calculates the interval of time between preventive maintenance tasks for each component, minimizing the costs, and in such a way that the total downtime, in a certain period of time, does not exceed a predetermined value. It is presented an industrial case study where the algorithm is applied.
Źródło:
Journal of Polish Safety and Reliability Association; 2013, 4, 1; 29--34
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The analysis and assessment of security threats in the motor transport
Autorzy:
Wdzięczny, A.
Woropay, M.
Powiązania:
https://bibliotekanauki.pl/articles/246231.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport system
reliability
safety
Opis:
Transport is one of the major and economically most important branches of industry that provides employment opportunities and welfare for population. However, despite beneficial aspects that come together with transport development, it is often associated with potential threat to people's health and lives. It is needless to say that road safety has a great influence on society mobility. Out of all branches of industry, wad transport is considered to be the most dangerous. Such conclusions are drawn on the basis of statistics according to which the greatest numbers of people die in road accidents. Analysing the data gathered in given period, it can be estimated that more 90 per cent of the whole number of fatalities died in road accidents. Constantly increasing amount of incoming automotive vehicles as well as outdated road injrastructure in Poland contributes to the growth of various security threats connected with road transport. Due to the facts mentioned above, it is necessary to introduce important changes that would help to modify present road infrastructure and arrangement so that they are adjusted to continuously expanding transportation demands and needs. Therefore, the following changes shall be paid additional attention: quality ofroad infrastructure. Therefore, particular attention should be paid to the changes that are to be introduced. Such steps of modification aim at road infrastructure quality enhancement, improvement of the highway code, stricter requirements of different means of transport technical condition and changes concerning country transportation policy approach. These ideas are expected to result in increased road safety.
Źródło:
Journal of KONES; 2010, 17, 4; 575-581
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The assessment of the effectiveness of means of transport
Autorzy:
Wdzięczny, A.
Woropay, M.
Powiązania:
https://bibliotekanauki.pl/articles/246233.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport system
reliability
efficiency
Opis:
As far as the current rules involved in business enterprise operation process are concerned, one of the most significant characteristics is specified by the need of engaging economic criterion in all procedures involved. Thus, it is required to introduce deep and extensive analysis concerning economic aspects ofpassenger transport. First of all, it is essential to specify currently existing demand for passenger transport service and compare it in relation to the supply capabilities offered by a transport enterprise. Business advantages created by the enterprise are also necessary to be considered and analysed. The basis for transport enterprise operation should be provided with order placed by Passenger Transport Executive, subcontracting firm of a chosen line according to valid schedule including both, rush and after-rush hours. In order to avoid any possible difficulties it is very important that the hired company is informed about all factors influencing economic efficiency of the serviced bus line. As a result, subcontractor is enabledto make right decisions and eliminate potential problems. Important processes having a considerable influence on proper functioning and effectiveness of public means of transport are connected with its usage, diagnosing and making it fitness for use. Operation effectiveness aspects that are the most frequently discussed in professional literature is described as relations existing between the profits and the input. It takes form of difference or quotient of the values mentioned above. This paper presents evaluation and analysis method controlling different means of transport operation system effectiveness. Method developed with the aim of analysing and evaluating public means of transport operation effectiveness, provides managerial staff with feedback, which is helpful as far as taking right decisions, is concerned. Making proper choices has a great influence on the process and it bears the responsibility for functioning of the system in terms of reliability and cost efficacy. Certainly, the more professional service is, the more satisfied customers are. Moreover, customer demands are more likely to be met, which means that all involved procedures related with functioning of the system are carried out in the accordance with regulations and reguirements, being currently inforce.
Źródło:
Journal of KONES; 2010, 17, 4; 567-574
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of the decision on transport systems’ reliability in emergency situations
Autorzy:
Kończak, J.
Mieteń, M.
Szafran, K.
Powiązania:
https://bibliotekanauki.pl/articles/347392.pdf
Data publikacji:
2017
Wydawca:
Akademia Wojsk Lądowych imienia generała Tadeusza Kościuszki
Tematy:
reliability
transport systems
security
Opis:
In the study, the authors focused on determination of reliability indicators of the transport systems, which currently constitute the Polish Armed Forces’ equipment. The methods of research of car fleets composed of distinct types of vehicles are presented. The algorithms of reliability indicators’ determination addressed in the study can serve to analyze other set of transportation means used in rescue, seasonal transport and specialized transportation assignments, as well as to determine the security level of any mission conducted. The appearance of information technology allowed transferring the paper-based registration system of operational occurrences into an integrated information system. It enables to follow the history of transportation fleets including single pieces of the equipment. The knowledge of reliability of particular types of the vehicles allows for proper planning of missions within the framework of possessed transport assets capacity. The study presents the method of achieving the intended objective to increase the effectiveness of management of motor vehicles fleet used intermittently. The algorithm for the selection of a vehicle or a group of vehicles for execution of tasks, developed on the basis of analytical procedures, envisages the assignment of mobile assets, complication and complexity of their structures, the level of modernity, operational history and branch regulations. Determined reliability indicators for particular groups of vehicles can be implemented into the Multilevel Information System.
Źródło:
Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki; 2017, 4; 216-230
1731-8157
Pojawia się w:
Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computer aided maintenance management of electronic equipment used in transport
Autorzy:
Siergiejczyk, M.
Rosiński, A.
Powiązania:
https://bibliotekanauki.pl/articles/359677.pdf
Data publikacji:
2013
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
maintenance
reliability
routine inspections
Opis:
Electronic equipment used in transport operates under various conditions. Due to characteristic nature of their application, they should be highly reliable. This paper presents a methodology of optimising a bistable operation process of those systems factoring in economic factors, i.e. the funding allocated to routine inspections. Its practical application was also discussed, which would entail computer aided maintenance software.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2013, 33 (105); 100-105
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł

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