On the basis of random numbers, The structure-formula of the normal random variable has been designed according to the limit theorem.
根据中心极限定理，以随机数为基础，设计了正态随机变量的结构公式，其数学期望和方差可任意给定。
The track geometry irregularity is a stable normal distribution and state-history random variable.
轨道几何不平顺为平稳的正态分布和各态历经的随机变量。
The paper affirms the stochastic properties of household gas consumption, and then proves a random variable in normal distribution.
本文通过分析确认了居民燃气消耗量的随机性，进而证明其为服从正态分布的随机变量。
The paper affirms the stochastic properties of household gas consumption, and then proves a random variable in normal distribution.
本文通过分析确认了居民燃气消耗量的随机性，进而证明其为服从正态分布的随机变量。
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