The analysis methods of nonstationary signals, which are widely exist in our real life, play an important role in modern signal processing.
非平稳信号作为现实生活中普遍存在的信号形式，其分析处理在现代信号处理中占有特殊重要的地位。
The characteristic of the concentration wave in the RTD of out-circular reactor, which is a nonstationary quasi-periodic signal, has been investigated with wavelet analysis.
应用小波分析研究了外循环反应器浓度波这类非平稳拟周期信号的特征。
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