4Daubechies I. The wavelet transform, time-frequency localization and signal analysis [J]. IEEE Transac- tions on Information Theory, 1990, 36(5): 961- 1005.
5Cohen L. Time-frequency distributions-a review[J]. Proceedings of IEEE, 1989, 77(7):941-981.
6Murugan K, Ramesh R. Electrocardiogram signal a- nalysis using Zoom-FFT[-C-//Proc of Biosignals and Biorobotics Conference (BRC). Manaus: IEEE Con- ference Publications, 2012: 1-4.
7Fyfe K R, Munck E D S. Analysis of computed or- der tracking[J]. Mechanical Systems and Signal Processing, 1997, 11(2): 187-205.
8韩林,张瑞林.旋转机械故障机理及诊断技术[M].北京:机械工业出版社,2000:58-63.
9Salehi S A, Amirfattahi R, Parhi K K. Pipelined ar- chitectures for real-valued FFT and hermitian-sym metric IFFT with real datapaths[J]. Circuits and Systems: II, 2013, 60(8): 507-511.
10Aypma A. Learning methods for machine vibration analysis and health monitoring[D]. Delft: Department of Applied Physics, Delft University of Tech- nology, 2001.