power spectra density psd
power spectra density psd
功率谱密度PSD
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The track spectra of Qinhuandao-Shenyang(QS) passenger railway line and German railways were compared in terms of power spectrum density(PSD), amplitude of time domain samples and dynamic performance.
从轨道谱的功率谱密度、时间样本幅值及对动力学性能影响的角度，对比了秦沈线轨道谱和德国轨道谱。
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