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Reliability approximation using finite Weibull mixture distributionsBučar, Tomaž ; Nagode, Marko ; Fajdiga, MatijaThe shape of measured or design life distributions of systems can vary considerably, and therefore frequently cannot be approximated by simple distribution functions. The scope of the paper is to ... prove that the reliability of an arbitrary system can be approximated well by a finite Weibull mixture with positive component weights only, without knowing the structure of the system, on condition that the unknown parameters of the mixture can be estimated. To support the main idea, five examples are presented. In order to estimate the unknown component parameters and the component weights of the Weibull mixture, some of the already existing methodsare applied and the EM algorithm for the m-fold Weibull mixture is derived. The fitted distributions obtained by different methods are compared to the empirical ones by calculating the AIC and C values. It can be concludedthat the suggested Weibull mixture with an arbitrary but finite number of components is suitable for lifetime data approximation. For parameter estimation the combination of the alternative and EM algorithm is suggested.Source: Reliability engineering & systems safety. - ISSN 0951-8320 (Letn. 84, št. 3, 2004, str. 241-251)Type of material - article, component partPublish date - 2004Language - englishCOBISS.SI-ID - 7099675
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http://www.sciencedirect.com/science/journal/09518320DOI: 10.1016/j.ress.2003.11.008
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source: Reliability engineering & systems safety. - ISSN 0951-8320 (Letn. 84, št. 3, 2004, str. 241-251)
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Database name | Field | Year |
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Bučar, Tomaž | 21960 |
Nagode, Marko | 13469 |
Fajdiga, Matija | 00819 |
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