随机变量(stochastic variable): 设 为一个随机过程,那么在任意一个时刻 上的取值 就是一个随机变量.
 As it actually has fluctuation, the demand is treated as stochastic variable.
 由于实际中需求具有波动性,将需求作为随机变量来处理.
 So it is the important subject in probability to study the independence of stochastic variable.
 因而,关于随机变量的独立性的研究构成了概率的重要课题.
 Market demand is a stochastic variable which brings difficulty for most profit by ordering right goods.
 市场需求量是一个随机变量,它给订货者追求最大利润,确定最优订货量带来了困难.
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 请问您想要如何调整此模块?