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中文摘要：
提出了用EM算法对产品可靠性进行分析．在退化模型中，当随机效应服从指数族分布时，推导了参数估计的一般公式并且通过模拟评价了随机效应分布选取的敏感性．最后分析了两个实际例子．
英文摘要：
Statistical inference procedures were proposed in assessing product reliability based on EM algorithm. The general formulae to estimate parameters were derived in the degradation model when its random effects follow an exponential family, and sensitivity of the choice of the distributions of the random effects was assessed via simulation. Two real data sets were analyzed.
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