weighted mean

基本解释

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。
Then the decision tree of electric power grid diagnosis is built by using weighted mean roughness as separating attributes standard to realize electric power grid fault diagnosis.
然后采用加权平均粗糙度的概念，作为选择分离属性的标准，构造电网故障决策树，从而实现对电网的故障诊断。
Based on experiment and the problems of calculation and composition of damage effect about artillery weapon performance, this paper puts forward the exponent model and weighted mean model.
根据试验结果和武器性能对毁伤效能的计算和排序问题，给出了计算炮兵武器毁伤效能的指数法模型和加权平均模型；

However, the current trade weighted index (TWI) has the majors undervalued by -8% when compared to the mean of the last three decades.
FORBES: EURO Temporarily Rooted But For How Long?
Last week, the market noted that the current trade weighted index (TWI) has the majors undervalued by -8% when compared to the mean of the last three decades.
FORBES: Move up http://i.forbesimg.com t Move down