mathematical expectation
数学期望：随机变量的平均值
常用释义
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基本释义
- 数学期望：随机变量的平均值，代表了随机变量在大量重复试验中的平均表现。
例句
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1·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。
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2·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。
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3·This paper explores the application of conditional expectation in solutions to mathematical expectation and best prediction.条件数学期望是概率论中一个重要概念，本文通过求数学期望的例子和最优预测探讨了它的应用。
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4·Experimental Verification: Theory formula is the average value of the random variable mathematical expectation (estimated) formula.实验验证：理论平均值公式就是随机变量取值的数学期望(估计)计算公式。
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5·In Stochastic Model Predictive Control, chance constraints are presented and the objective function is an mathematical expectation.在随机预测控制中，约束是机会约束，目标函数是数学期望，滚动优化求解的是随机优化问题。
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6·This depends to a great degree on the wideness of the spread between the mathematical expectation of number one versus number eight.这取决于第一和第八的数学期望的差异度有多大。
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7·A double forecasting model is proposed by using conditional mathematical expectation, based on probability distribution of port cargo throughput.在得出港口货物吞吐量概率分布的基础上，利用条件数学期望提出了港口货物吞吐量的双层预测模型。
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8·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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9·In this paper, we consider both the mathematical expectation and variance for the time to failure of some systems and design a system with ideal reliability.本文研究系统寿命的均值和方差，并设计出较为理想的可靠性系统。
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10·Mathematical expectation is important concept of probability theory, to apply mathematic expectation discuss economic problems, and obtain useful conclusions.数学期望是概率论的一个重要概念，应用数学期望讨论某些经济问题，从而得到一些有意义的结论。