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
This paper introduces expected value principle, expected utility principle and prospect theory in decision making under risk.
本文介绍了风险型决策中的期望值原则，期望效用原则和前景理论。
The present value of future cash flow is determined by such three factors as expected cash flow, the risk of expected cash flow, and the time value of money.
未来现金流量的现值，由期望的现金流量、期望现金流量的风险以及货币的时间价值三个因素决定；
Currently, low risk appetite co-exists with low interest rates, the market trend opportunities still have to wait, but the value stock wheeled market is still expected to continue.
目前，低风险偏好与低利率并存，市场趋势性机会仍需等待，但价值股轮动行情仍有望延续。
The risk of stock market refers to the possibility of security value loss and the deviation of real earnings from expected returns, which can be both earning deviation and capital loss.
证券市场风险是证券价值遭到损失的可能，实际收益对期望收益的偏离，这既可以是收益的偏离也可以是资产的损失等。
Based on the credibility theory, an algorithm for random fuzzy operational risk assessment is proposed, and power system operating risk is expressed by a random fuzzy expected value.
提出了基于可信性理论的运行风险评估算法，采用随机模糊变量的期望值表示全系统的运行风险指标。
This study demonstrates that, in the meaning of the expected value, the interior outer set model is reliable for calculating the fuzzy risk of the natural disaster.
这一研究表明，内集-外集模型用于自然灾害模糊风险评估，在期望值的意义上是一个可靠的模型。
The expected value principle to compute the pure premium, introducing risk factors into the bonus-malus system to calculate the posteriori premium of varied policy-holders.
用期望值原理构造推算纯保费，将年龄与性别作为风险因素引入最优奖惩系统，并推算不同类别保单组合的后验保费。
The expected value principle to compute the pure premium, introducing risk factors into the bonus-malus system to calculate the posteriori premium of varied policy-holders.
用期望值原理构造推算纯保费，将年龄与性别作为风险因素引入最优奖惩系统，并推算不同类别保单组合的后验保费。
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