analysis of time frequency
analysis of time frequency
时频分析
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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In this paper, six wavelet functions were selected for the analysis of time-frequency characteristics of the pressure wave signal in fuel injection system of a diesel engine.
通过选用六种不同的小波函数，对柴油机喷油系统压力波信号的时频特性进行了小波分析研究。
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