At the same time, a hybrid numerical and analytical method is used to calculate and analyse the visco-thermal effect on the sound propagation in wider ducts.
同时，利用理论和数值相结合的方法计算和分析了热粘性效应对较粗管道中声传播的影响。
In this dissertation, both numerical method and analytical method are applied to analyze the EM scattering characteristics of periodically reactance-loaded multilayer dielectric structures.
本文分别采用数值方法和解析方法，分析周期性电抗加载多层介质结构的电磁散射特性。
Because the boundary element method is half analytical and half numerical, there exist the problems of the existence and uniqueness of the solutions.
由于边界元法是半解析半数值解法。在解边界积分方程时会遇到解的存在与唯一性问题。
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