常見例句雙語例句The weighted mean of the random variable is the expected value.隨機變量的加權(quán)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.然后采用加權(quán)平均粗糙度的概念，作為選擇分離屬性的標準，構(gòu)造電網(wǎng)故障決策樹，從而實現(xiàn)對電網(wǎng)的故障診斷。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.根據(jù)試驗結(jié)果和武器性能對毀傷效能的計算和排序問題，給出了計算炮兵武器毀傷效能的指數(shù)法模型和加權(quán)平均模型；權(quán)威例句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 返回 weighted mean