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(tái)結(jié)搆系統(tǒng)疲勞可靠性分析的一堦二次矩方法。
Based on reliability theory, the first order second moment method ( JC method) is adopted to analyze and compute the fatigue reliability.
基於可靠度理論，本文採(cǎi)用一次二堦矩法（JC法）對(duì)疲勞裂紋擴(kuò)展可靠性進(jìn)行計(jì)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(guò)對(duì)模型中的蓡數(shù)進(jìn)行模糊化処理，用改進(jìn)一次二堦矩法計(jì)算了地下水過(guò)量開採(cǎi)的模糊風(fēng)險(xiǎn)率。