By using the method of coordination transformation and expandedness Fourier series, an analytic solution is obtained from studying the Newtonian fluids laminar flow in eccentric anulus.
采用坐标变换和函
展开成傅立叶级
的方法,推导出了牛顿流体偏心环空轴向流动速度场的严格



.
By using the method of coordination transformation and expandedness Fourier series, an analytic solution is obtained from studying the Newtonian fluids laminar flow in eccentric anulus.
采用坐标变换和函
展开成傅立叶级
的方法,推导出了牛顿流体偏心环空轴向流动速度场的严格



.
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.
用比较直接的方法证明幂级
的和函

敛域内可以逐项微分的公式;并得到了计算傅立叶系
的一种简便方法.
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