二维正态分布函数值的计算是估算串联结构体系失效概率上、下限的一项重要内容。
It is an important aspect to compute the two dimensional distribution in estimating the bounds of failure probability of series structures.
随机疲劳、混沌疲劳及复合材料疲劳寿命估算属疲劳学研究的三个重要前沿．给出了疲劳损伤的动态概率分布；
Stochastic fatigue, chaotic fatigue and the fatigue life estimation of the composite material are three important aspects in fatigue research. The fatigue damage probability distribution was given.
作者从概率的概念出发，提出了估算某个变量可能取值，以概率分布取代单值估算的观点，进一步对概率分布估算参数的可信性进行了讨论。
Based on the concept of probability, the possible value for a variable is pro-posed with the estimation of a single value replaced by probability distribution.
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