中文摘要：

给出了多组序进应力加速寿命试验下指数分布的极大似然估计的存在和唯一的一个充要条件；模拟比较了一组与二组序进应力加速寿命试验下有关参数估计的差异；对Weibull分布给出了有关参数的联合置信域．

英文摘要：

Under multiplicate progressive stress accelerated life test, a necessary and sufficient condition for the existence and uniqueness of MLE in case of exponential distribution is given. The difference between parameter estimators under one progressive stress accelerated life test and those under two tests is compared by using Monte-Carlo simulation. The confidence regions for Weibull distribution are presented and compared as well.