first order second moment

基本解釋

A first order second moment formulation for systems fatigue reliability assessment of offshore structures is presented.
本文提出了海洋平臺結(jié)構(gòu)系統(tǒng)疲勞可靠性分析的一階二次矩方法。
Based on reliability theory, the first order second moment method ( JC method) is adopted to analyze and compute the fatigue reliability.
基于可靠度理論，本文采用一次二階矩法（JC法）對疲勞裂紋擴展可靠性進行計算。
The parameters of the model are fuzzily processed and the fuzzy risk can be evaluated by using the modified first order second moment method.
通過對模型中的參數(shù)進行模糊化處理，用改進一次二階矩法計算了地下水過量開采的模糊風險率。