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。