variable adj. 1.易变的,变化无常的,无定的 (opp. constant, steady)。 2.可变的,能变的;变换的。 3.【数学】变量的;【天文学】变光的;【生物学】变异的。 Prices are variable according to the exchanges. 物价跟着汇率变动。 a man of variable character 反复无常的人。 a rod of variable length (伸缩)如意棒。 a word of variable construction 可以作种种解释的词。 variable capital 可变资本。 a variable budget 临时预算。 n. 1.易变的东西。 2.【数学】变量,变数,变项,变元 (opp. constant);【天文学】变星 (=variable star);【航海】(方向不定的)变风,不定风 (opp. trade wind); 〔pl.〕 (贸易风带中的)变风带。 adv. -ably ,-ness n.
A new approach to prove the expectancy formula on the sum of stochastic variables 随机多个随机变量之和的期望公式的一种新证法
Computer simulation is known as an efficient method for dealing with stochastic variables in the inventory system 仿真被认为是处理复杂库存系统中随机变量的有效方法。
Firstly , the article introduces the theory of system simulation and the stochastic numeral and the stochastic variable 本文首先介绍了系统模拟理论,以及产生随机数从而生成需要的随机变量的方法。
By contrast , the paper calculated the reliability index of the abutment after changing variable quotiety of the stochastic variable 作为对比,本文还在改变各随机变量变异系数的前提下,计算了坝肩岩体各高程的可靠指标。
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。