常見例句雙語(yǔ)例句This paper introduces the pulse wide modulation(PWM) based on minimum root-mean-square value of harmonic current of inverter.介紹了逆變器諧波電流均方根值最小的脈寬調(diào)制(PWM )。This modification incorporates explicitly the duration of strong earthquake ground motion into the time dependent variation of the root-mean-square peak amplitude.這個(gè)修正明顯地將強(qiáng)震運(yùn)動(dòng)的持續(xù)時(shí)間包含在均方根振幅依賴于時(shí)間的變異中。Using the adjoint system method, analytical solutions of interceptor's root-mean-square miss distance are derived from the case where the penetration missile adopt random maneuver strategy.用共軛系統(tǒng)分析法,得到了該模型在突防導(dǎo)彈隨機(jī)機(jī)動(dòng)突防策略的作用下,攔截導(dǎo)彈脫靶量均方根的解析解。原聲例句What we want to do now is compute the mean and variance of the portfolio-- or the mean and standard deviation, since standard deviation is the square root of the variance-- for different combinations of the portfolios.我們現(xiàn)在要做的是,計(jì)算這個(gè)投資組合的均值和方差-,或者均值和標(biāo)準(zhǔn)差,因?yàn)闃?biāo)準(zhǔn)差的平方就等于方差-,這對(duì)任何投資組合都是一樣的。耶魯公開課 - 金融市場(chǎng)課程節(jié)選 返回 root-mean-square