zero probability

This paper analyzes the event s independences and incompatibility, and discusses some relations among independence, incompatibility and null events.

对事件的独立性、互不相容性进行了剖析,并讨论了独立性、互不相容性与零概率事件的关系。

,the stress-strength interference model,components failure probability is regarded as a random variable complying with a certain distribution.

根据可靠性数学理论,从零件失效物理模型应力-强度干涉模型出发,把零件失效概率看作是服从某种分布的随机变量,推导了冗余系统共因失效概率预测模型的数学表达式。

A model for common cause failure probability was derived based on the distribution of the conditional failure probability of components.

在分析了现有共因失效模型的适用范围与局限性的基础上,从零件失效物理模型———应力-强度干涉模型出发,把零件失效概率看作是基于应力的条件概率,即为随机变量;推导了基于零件条件失效概率分布的共因失效概率模型;通过Monte Carlo法仿真及最优化方法优化,得到了零件条件失效概率分布的类型;对模型中的参数进行估计,得到部分失效数据下的参数估计值。