中文说明：利用机械信号在频域的稀疏性，对其进行傅里叶变换，通过sca对观测信号进行盲分离，分理出源信号
English Description：
Based on the sparsity of mechanical signal in frequency domain, Fourier transform is used to separate the observed signal, and the source signal is separated by SCA
Application of underdetermined blind source separation in mechanical fault diagnosis
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中文说明：利用机械信号在频域的稀疏性，对其进行傅里叶变换，通过sca对观测信号进行盲分离，分理出源信号
English Description：
Based on the sparsity of mechanical signal in frequency domain, Fourier transform is used to separate the observed signal, and the source signal is separated by SCA