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王琳, 师义民, 袁修国
(西北工业大学 应用数学系, 陕西 西安 710072)
摘要: 基于逐步增加Ⅱ型截尾样本,研究MLINEX损失下Burr Ⅻ部件可靠性指标的经验Bayes估计。利用MLE方法求出超参数的估计,从而得出未知参数、可靠度及失效率函数的经验Bayes估计。最后通过Monte-Carlo方法给出随机仿真例子,表明当样本容量m相同时,截尾数n越小,均方误差越小;当截尾数n相同时,样本容量m越大,均方误差越小。
关键词: 经验Bayes估计; Burr Ⅻ; MLINEX损失; 逐步增加Ⅱ型截尾样本
中图分类号: O 212 文献标志码: A
Empirical Bayes Estimators of Reliability Performances of Burr Ⅻ Parts under MLINEX Loss
WANG Lin, SHI Yi-min, YUAN Xiu-guo
(Department of Applied Mathematics,Northwestern Polytechnical University,Shaanxi Xi’an 710072,China)
Abstract: Based on progressively type Ⅻ censored samples,the empirical Bayes estimators of reliability performances for Burr Ⅻ distribution are studied under MLINEX loss. The empirical Bayes estimators of the unknown parameter,the reliability function and failure rate are derived where hyper-parameter is estimated using maximum likelihood method. Finally,we present a numerical example by means of the Monte-Carlo simulation to illustrate the method we use is correct.
Key words: empirical Bayes estimation; Burr Ⅻ; MLINEX loss; progressively type Ⅻ censored samples
收稿日期: 2010-09-13
基金项目: 国家自然科学基金项目(70471057);陕西省教育厅自然科学基金项目(03JK065).
作者简介: 王琳(1985—),女,硕士研究生.