In order to make the 3D modeling more quickly by The integral equation method, some Approximation method was turned up, such as Born method、Extended Born approximation and Quasi-linear Method and so on.
出于对利用积分方程法快速进行三维模拟的需要,出现了很多的近似方法,如Born近似方法、局部非线性近似方法和拟线性近似方法等。
参考来源 - 直流电场拟解析近似理论实现技术研究·2,447,543篇论文数据，部分数据来源于NoteExpress
A simple approximation method is presented in this paper.
本文对其提出一种简便的近似算法。
A backscatter model was developed for measuring wind field with far-field approximation method.
提出了一种基于远场近似法建立的大气风场测量散射模型。
The polynomial approximation method is also employed to obtain simple formulas for frequency and amplitude correction.
本文利用多项式逼近方法获得了频率和幅值修正的计算公式。
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