用接触电位差（ CPD ） 方法研究了导电聚合物MEH -PPV薄膜的光电特性。
The photoelectric characteristics of conducting polymer MEH - PPV film were studied using contact potential difference ( CPD ) method.
用该方法可以计算接地网的工频电流下的任何参数，如工频接地阻抗、接触电压和跨步电压、网内电位差等。
The methods are able to compute any parameter of grounding grids in power current, such as power ground impedance, touch and step voltage, potential differences within grounding grids and so on.
介绍了接触电位差法固定探头式无损探伤装置的结构，工作原理，测量电路及其频率特性。
The structure, working principle, measuring circuit and frequency characteristics of contact potential difference nondestructive testing equipment using fixed probe am intro - duced.
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