以前的研究表明，接触故障对信号传输的影响与很多因素有关，如接触阻抗和信号传输频率。
In former research the effects of electric contact on signal transmission have relations with a lot of factors, such as contact impedance and the frequency of transmission signal.
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。
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.
通过对该区中生界火山岩的测井、地震相、振幅、频率、波阻抗等地球物理响应研究，来进行岩性识别和储层预测，进而指导勘探部署。
The study of geophysical response, such as logging response, seismic facies, amplitude, frequency and wave impedance, is helpful for recognizing and predicting volcanic rock.
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