It is a great challenge for the manufacturer if these completing designs are highly reliable , since there are few ( or even no ) failures can be obtained by using traditional life tests or accelerated life tests 惟这些竞标的设计样式?属于可靠?产品的话，那么?用常规的寿命试验或加速寿命试验，将可能无法于一段合?的时间内获得足够的失效资? 。
It is a great challenge for the manufacturer if these completing designs are highly reliable , since there are few ( or even no ) failures can be obtained by using traditional life tests or accelerated life tests 惟这些竞标的设计样式?属于可靠?产品的话，那麽?用传统的寿命试验或加速寿命试验，将可能无法于一段合?的时间内获得足够的失效资? 。
Accelerated life testing ( alt ) and reliability growth testing ( rgt ) are summaried . based on the analysis , the theory and testing methods of accelerated reliability growth testing ( argt ) are presented in the paper 本文在分析总结加速寿命试验( alt )和可靠性增长试验( rgt )的理论基础上，建立了加速可靠性增长试验( argt )的理论与试验方法。
The step - access accelerated life testing ( ssalt ) and progressive stress accelerated life testing ( psalt ) are two kinds of effective methods which are widely used in life testing because of the development of their theories 步进应力加速寿命试验和序进应力加速寿命试验是有效和经济的寿命试验方法，随着理论的日趋成熟，在实践中开始得到应用和推广。
In this paper , we first discuss statistical model and data analyses under accelerated life testing by circular - progressive - stress when the life distribution follows log - normal distribution , then give three methods of estimators of parameters 本文在产品寿命服从对数正态分布的场合下，讨论了循环序进应力加速寿命试验模型，给出了相应参数的几种统计分析：极大似然估计；极大似然估计与回归相结合的估计；最小距离估计。
Professor elsayed has been involved in accelerated life testing since 1987 when he developed a reliability prediction model . during the last four years , he has extended his work to the degradation modeling area . members of the press and interested parties are welcome to attend 1987年， professorelsayed创立了一套可靠性预测模式，自此，他一直参与寿命加速测试的研究工作，在过去四年，他把工作范畴扩展至可靠性衰减模式的建立。
At first , the energy expression is presented for failure mechanism , and it is applied in accelerated life testing and accelerated reliability growth testing . the conditions of common failure mechanism are obtained . the essential relation between the conditions and accelerated factor ( af ) is proposed by the energy model 首先，提出了失效机理的能量表述形式，并将其在加速寿命试验与加速可靠性增长试验中进行应用，推导出了加速寿命试验与加速可靠性增长试验中产品失效机理不变的条件，以及这些条件与加速系数( a _ f )之间的本质联系。
In this thesis , the critical components of pcs are analyzed and tested in detail . i present the scheme of reliability qualification test of capacitors , furthermore , analyze the sampling inspection scheme theoretically for capacitors and put forward the proposals to improve this scheme . for most of components in pcs with high reliability or long lifecycle , which need great investment of time and material for their reliability tests , this paper provides a new and effective statistical method for this kind of components - the progressive stress accelerated life testing with exponential distribution 可靠性试验也是可靠性工程的重要组成部分，能源系统许多元器件为高可靠性、长寿命器件，且大部分是非标准器件，为保证整个系统的可靠性，必须对备选元器件进行可靠性试验，本文对能源系统关键器件进行了详细的试验分析，给出了电容器的鉴定试验方案，对其抽样试验方案进行了理论分析并给出了方案改进建议。
Fifth , through statistical analysis of electrical connector accelerated life test data , verified that the reliability statistical model of electrical connector and the reliability statistical method under doof data are both correct . applied the maximum likelihood estimate method with the least squares estimator of test data as preliminary estimate and weighted least square estimate method separate to treat the different kind test data , obtained the estimator of electrical connector reliability characteristic values 第五，采用极大似然估计法和加权最小二乘法对电连接器加速寿命试验数据进行了统计分析，得到了电连接器可靠性特征量的估计值，验证了电连接器可靠性统计模型和doof数据下可靠性分析方法的正确性。
In chapter2 , we discuss the step - stress accelerated life test . under typei and typeii censoring of data from the exponential distribution , we first present a necessary and sufficient condition for the existence and uniqueness of the maximum likelihood estimators of the parameters for the distribution , then give two confidence intervals based on the mle . finally , we compare them with results obtained in [ 8 ] by using monte - carlo simulation 本文第二章首先给出了指数分布场合下步进应力加速寿命试验定时和定数截尾的mle的存在和唯一的充要条件，然后给出了正常应力下平均寿命的近似置信区间，最后用随机模拟的方法研究了mle的点估计的偏性和均方误差，近似置信区间覆盖真值的比率并与其它方法作了比较。
