This paper gives a method for analysing and computing the resonant frequency for some commonly used pipe systems by means of the fluid impedance method.

本文利用流体阻抗法对几种常见管系提供了求其固有频率的分析和计算方法。

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Numerical examples are shown to highlight the effects introduced by the anisotropic surface impedance. The method is realized by using the graphic electromagnetic computing (GRECO).

同时利用图形电磁计算（ GRECO）方法实现对各向异性材料的曲面结构的电磁计算。

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The mathematic and physical impedance matching models of transmission line and the impedance computing formulas are also pointed out.

指出了传输线阻抗匹配的数学物理模型及阻抗计算公式。

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