A cumulative damage model is proposed, which can be used to consider the influence of in plane bi-axial stresses and mean stress on the fatigue behavior of unidirectional laminates.
推荐了一种应变损伤累积模型，能够考虑单向板面内多轴应力和平均应力的影响。
Because some products show no failure in the random truncation test period, this paper USES the mean rank order method to calculate the empirical cumulative distribution function.
考虑随机截尾试验中有些试验产品无故障数据出现，提出采用平均秩次法计算经验分布函数。
The reserve costs of China Petro-Chemical Corporation from 1986 to 2002 are calculated by the different statistical methods of year mean, cumulative mean and running mean.
最后按照单年平均、累计平均和移动平均等不同统计方法，对中石化所属油田的油气储量成本进行了测算和分析。
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