The theory of reliability is based on the probability . it considers the variability of all stochastic variable and use taut probability to measure 可靠度理论是建立在概率论基础上,考虑了影响滑坡体稳定的各项随机变量的变异性,并用严格的概率来度量。
The waste load is regarded as a stochastic variable following the log - normal probability distribution based on statistical data , and the constrains on water quality levels are expressed in a probability form 假设排污量是服从对数正态分布的随机变量,并且以潮周期内水质达标的概率作为衡量控制点达标的依据。
But as the ship structure system is very big and complicated , and there are many stochastic variables , not much progress have been made in application the structural reliability base on sfem to the ship structure 但由于船舶结构体系庞大,随机变量众多,基于随机有限元的可靠度分析在船舶结构中应用缓慢。
Under the consideration of the uncertainty of the water environmental system , both the observed data of the river water quality and the parameters for the river water quality model are processed as the stochastic variables herein 摘要考虑到水环境系统的不确定性,把河流水质观测数据和水质模型参数都作为随机变量来处理。
This paper is mainly concerned with the dynamic reliability of massive - head dam under earthquake . during the analyses , it considers the effect of variability 、 relevance and truncate of the stochastic variable 本文主要研究在地震作用下大头坝的动力可靠性,在计算中还考虑了随机变量的变异,相关,截尾对其可靠度的影响。