提出了合理的人工边界反射系数公式，为有限元模型提供了理论基础。

A reasonable spurious parameter of artificial boundary is also proposed, which lays down the base for FEM numerical simulation.

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本文是第二部分，主要探讨了两类母线的接线情况下，线路边界的折、反射系数的频谱特征。

This paper is the second part, which presents the characteristic of reflection and refraction coefficient spectrum at line boundary.

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