常見例句A relatively direct method is expounded in this paper to prove the termwise differentiation of power series, and a simple method is expressed to calculate the Fourier coefficient. 用比較直接的方法證明冪級數(shù)的和函數(shù)在收斂域內(nèi)可以逐項(xiàng)微分的公式;并得到了計(jì)算傅立葉系數(shù)的一種簡便方法.Keywords Ceramic tunnel kiln Multivariate regression Termwise regression; 陶瓷隧道窯;多元回歸;逐步回歸;The methods to prove the termwise derivation and calculate the Fourier coefficient 證明逐項(xiàng)求導(dǎo)公式和計(jì)算傅立葉系數(shù)的方法Keywords strip drawing;cylindrical coordinate;strain rate vector;inner-product;termwise integral;analytical solution; 扁帶拉拔;柱坐標(biāo);應(yīng)變速率矢量;內(nèi)積;逐項(xiàng)積分;解析解;termwise integral 逐項(xiàng)積分 返回 termwise