美 [ɪkˈspektɪd ˈvæljuː]
期望值：随机变量的每个取值乘以其出现概率后的总和，或者是连续随机变量的概率密度函数与随机变量本身的乘积在所有可能取值上的积分。
expected value //
名词 the sum or integral of all possible values of a random variable, or any given function of it, multiplied by the respective probabilities of the values of the variable. Symbol: E(X). E(X) is the mean of the distribution; E(X–c) = E(X)–c where c is a constant 数学期望值 (Also called mathematical expectation)
the sum of the values of a random variable divided by the number of values
同义词： arithmetic mean / first moment / expectation
预期值-引用次数：1
参考来源我国通货膨胀预期的估计
shaley值
期待值
期望值-引用次数：15
In this thesis, Binary PSO has been analyzed through bit change rate, velocity expected value and genetic algorithm pattern theory.
本文从位改变率、速度的期望值及遗传算法模式概念等三个方面对其进行分析。 本文得到:二进制PSO算法不收敛于群体最优粒子,其位值随着迭代运行而越来越随机。
参考来源粒子群算法的基本理论及其改进研究
指望值
希望值
期望值
指望值
期望价值
期待值
预期值
期望值
期望值（expected value）是指有数值结果的随机情景之每一个结果乘上它的机率，再对所有可能结果加总而得。如果用符号表示，可能
随后，他从这个问题入手引入了"期望价值"(expected value)这一概念，并接着向大家介绍了人们在选择中常常遵守的期望价值法则和支配法则。
预期值 （ expected value ）：一变量在各结果状态下的加权平均数，权数为各结果状态 可能发生的概率。
... expectation 期待值 expected value 期待值 experiment 实验 ...
[会计][自][数]期望值；预期值；统计平均值
Since this is a concave function, it's not just the expected value.
由于这是一个凹函数，它不仅仅是期望值。
We have expected value, mean or average.
我们可以用期望值，或者是平均值。
The weighted mean of the random variable is the expected value.
随机变量的加权平均值是期望值。
Even if the expected value is the same, they'd move around a lot.
即使股票的价格是一样的，但是它们的价格经历很多改变。
计算机科学及编程导论课程节选 : 麻省理工公开课
Another important concept in probability theory that we will use a lot is expected value, the mean, or average-- those are all roughly interchangeable concepts.
概率论中另外一个常用的重要的概念是,期望值或者也叫均值,这两个概念可以互换
金融市场课程节选 : 耶鲁公开课
Expected value is good and variance is bad because that's risk; that's uncertainty.
期望值越高越好,方差就相反,因为方差代表着风险,也就是不确定性
金融市场课程节选 : 耶鲁公开课
No other large cap stock comes close to positive expected value on any form of investment direct stock purchase, options, combinations.
The picture of the Highgrove estate which sold for twice its expected value, was among several exhibits auctioned to raise money for a memorial garden for September 11 victims.
BBC: NEWS | UK | England | Gloucestershire | Prince's artwork raises charity cash
But how much this would cheer the industry would depend on the price: it would be cold comfort if the price just balanced the expected value of future profits.