最近，由于产权变换和资产剥离，火车营运线路大大减少了。
In recent times, what services there were had been greatly reduced after several changes of ownership and much asset-stripping.
本文在频变参数基础上提出了一种计算电晕线路响应特性的新变换方法，并用其计算了线路的雷电波响应。
Based on the frequency parameters, a new transformation method to determine the response to lightning impulse wave on transmission line with corona is proposed in this paper.
该方法利用小波变换分析所采集的故障暂态信号，提取用于选线的暂态信息，并采用综合相位比较法确定故障线路。
In this method the transient fault signals are analyzed with wavelets transform to obtain the transient fault information, and the fault circuit is selected by the synthetic phase comparison method.
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