expected value
- 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。
专业释义英英释义
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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
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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
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指望值期望价值期待值预期值
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期望值
·2,447,543篇论文数据，部分数据来源于NoteExpress
expected value
- n. the sum of the values of a random variable divided by the number of values
以上来源于: WordNet
柯林斯英汉双解大词典
expected value
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1.
N 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) [statistics]
双语例句原声例句权威例句
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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。
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We have expected value, mean or average.
我们可以用期望值，或者是平均值。
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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。
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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。
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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
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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
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