以下为句子列表：
英文: A new envelope demodulation method based on empirical mode decomposition (EMD) is proposed to make up the limitation that meaningless frequencies often arise in the envelope spectrum of conventional envelope demodulation method.
中文: 摘要提出了一种新的调制信号解调分析技术，来抑制传统的包络解调方法中经常出现的无意义的频率成分。
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英文: Numerical simulation signal and vibration acceleration signal of a roughing mill main drive speed reduction unit have been decomposed by using empirical mode decomposition algorithm; each component has been carried on spectral analysis.
中文: 摘要运用经验模式分解算法对数值仿真信号及某轧钢厂粗轧机主传动减速机振动加速度信号进行了分解，从而得到若干个基本模式分量，对每个模式分量进行了频谱分析。
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英文: The results of emulation and practical technical application indicate that time sequence components observed by empirical mode decomposition algorithm and frequency spec trum of them can reflect partial failure signature of gear adequately, at the same ti
中文: 仿真研究及实际工程应用表明，采用经验模式分解算法后得到的时序分量及其频谱能够很好地体现齿轮局部故障特征，具有很强的弱信号特征提取能力。
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英文: With the cyclostationarity property of rotating machinery fault signal, empirical mode decomposition (EMD) is applied to the analysis of vibration signal of rotating machine and the issue of interferential items in the method of cyclostationarity is figur
中文: 通过理论推导、仿真实验、真实数据验证，以及和原有方法进行比较，表明经验模式分解联合循环平稳分析方法能够有效地识别故障特征，并避免干扰项。
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