N [statistics] → another name for expected value
Mathematical expectation is one of the important digital features of random variable.
数学期望是随机变量的重要数字特征之一。
Suppose the mathematical expectation of image signal is zero, the basic properties of the correlator output are given.
假定图象信号的数学期望为零，证明了相关器输出的基本性质。
The standard air defense fire unit theory demand was calculated by adopting damage probability method and damage target mathematical expectation method.
标准防空火力单元理论需求量采用毁歼概率法和毁歼目标数学期望法计算。
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