7HUANG N E, SHEN Z, LONG S R. The empirical mode decomposition and the Hilbert spectrum for nonlinear and non-stationary time series analysis [J]. Proceedings of the Royal Society of London, 1998, 454(1): 903-995.
8HUANG N E, SHEN Z, LONG S R. A new view of nonlinear water waves: The Hilbert spectrum [J]. Annual Review of Fluid Mechanics, 1999, 31: 417-457.
9LIU B, RIEMENSCHNEIDER S, XU Y. Gearbox fault diagnosis using empirical mode decomposition and Hilbert spectrmn [J]. Mechanical Systems and Signal Processing, 2006, 20. 718-734.
10RAI V K, MOHANTY A R. Bearing fault diagnosis using FFT of intrinsic mode functions in Hilbert-Huang transform [J]. Mechanical Systems and Signal Processing, 2007, 21: 2607-2615.