9Z. Hameed, Y.S. Hong, Y. M. Cho, et al. Condition monitoring and fault detection of wind turbine and related algorithms: A review[J]. Renewable & Sustainable Enegy Reviews,2009,12( 1 ) :31 - 39.
10Huang N E, Shen Z, Long S R, et al. The empirical mode decomposition and the Hilbert spectrum for non-linear and non-stationary time series analysis[J].Proceedings of the Royal Society, 1998, 454A: 903- 995.
