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    題名: Bayesian estimation based on sequential order statistics for heterogeneous baseline Gompertz distributions
    作者: Tsai, Tzong-Ru;Xin, H;Kao, C-H
    關鍵詞: composite dynamic system;hazard rate;heterogeneity;Markov chain Monte Carlo;sequential order statistics
    日期: 2021-01-11
    上傳時間: 2021-03-05 12:14:01 (UTC+8)
    摘要: A composite dynamic system (CDS) is composed of multiple components. Each component failure can equally induce higher loading on the surviving components and, hence, enhances the hazard rate of each surviving component. The applications of CDS and the reliability evaluation of CDS has earned more attention in the recent two decades. Because the lifetime quality of components could be inconsistent, the lifetimes of components in the CDS is considered to follow heterogeneous baseline Gompertz distributions in this study. A power-trend hazard rate function is used in order to characterize the hazard rate of the CDS. In order to overcome the difficulty of obtaining reliable estimates of the parameters in the CDS model, the Bayesian estimation method utilizing a hybrid Gibbs sampling and Metropolis-Hasting algorithm to implement the Markov chain Monte Carlo approach is proposed for obtaining the Bayes estimators of the CDS parameters. An intensive simulation study is carried out to evaluate the performance of the proposed estimation method. The simulation results show that the proposed estimation method is reliable in providing reliability evaluation information for the CDS. An example regarding the service system of small electric carts is used for illustration.
    關聯: Mathematics 9(2), 145
    DOI: 10.3390/math9020145
    顯示於類別:[統計學系暨研究所] 期刊論文

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