expectation value
表示随机变量的平均值
常用释义
英式发音
美式发音
基本释义
- 期望值：在概率论和统计学中，表示随机变量的平均值，是对该随机变量的所有可能取值的加权平均。
例句
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1·The term expectation value is often used instead of average value.期望值这个名称常用来代替平均值。
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2·Discusses the consulting organization's expectation value, user's expectation value and the real exchange price of information consulting service.对咨询服务价格的咨询机构期望值、用户期望值和实际交换价格进行讨论。
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3·Whether college students expectation value is reasonable may directly influence the graduates attitude to choice of jobs and employment after graduation.大学生就业期望值是否合理，直接影响毕业生择业、就业的态度。
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4·The expectation value of an observable bridges a quantum quantity with a certain classical quantity, but one must pay attention to the way of the bridging.一个可观察的期望值桥梁一个具有一定的古典数量的量子数量，但一定要注意衔接的方式。
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5·Build mathematical model of quantitative analysis, confirm the expectation value of light intensity, build standard work curve, improving analysis precision.建立定量分析数学模型，确定光强值，建立标准工作曲线，提高分析精度。
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6·Age and gender factors have significant influence on individual risk decision-making, when in the profit situation which is added to loss expectation value of small probability.在加入小概率损失期望值的获益情景中，性别、年龄因素对个体风险决策有显著影响。
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7·This is reflected in the fact that the vacuum expectation value of the field squared is nonzero in quantum field theory. Therefore there exist the so called vacuum fluctuations.这反映在量子场论中场量平方的真空平均值不为零，这就是所谓的真空涨落。
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8·Age and entrepreneurial intention have significant influence on individual risk decision-making, when in the loss situation which is added to profit expectation value of small probability.在加入小概率获益期望值的损失情景中，年龄和创业倾向对个体风险决策有显著影响。
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9·In the quantum statistical theory, the density operator is introduced in the statistical system. The expectation value of an obeservable can be obtained by the use of the density operator.在量子统计中，对统计系综引入了密度算符，力学量的平均值可以利用密度算符求出。
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10·A weighted critical path algorithm was provided to calculate the expectation value of the workflow's duration, record the process of reduction, and identify the time-oriented critical path.通过加权关键路径算法，可以计算工作流完成时间的期望值及记录约简过程中的中间结果，从而确定工作流模型的关键路径。