ZHANG Y, GAO Y, WANG L, et al. The removal of wall components in Doppler ultrasound signals by using the empirical mode decomposition algorithm[J].IEEE Trans Biomed Eng，2007,9(7):1631？1642.
[2]
MOLLA M K I, HIROSE K. Single？mixture audio source separation by subspace decomposition of Hilbert spectrum[J].IEEE Trans on Audio, Speech and Language Processing,2007，15(3):893？900？
？YAO Xiongliang, KANG Zhuang, DAI Wei, et al. Empirical mode decomposition and its application in the experiment research of flow noise[J].Journal of Harbin Engineering University, 2007,28(1):49？54.？
？JIA Mingping, LING Juan, XU Yunfei，et al. Empirical mode decomposition based on time series analysis and its application[J].Chinese Journal of Mechanical Engineering, 2004,40(9):54？57？
？SUN Weifeng, PENG Yuhua, XU Jianhua. A denoising method for laser ultrasonic signal based on EMD[J].Journal of Shandong University(Engineering Science), 2008,38(5):121？126.？
[11]
KOPSINIS Y, MCLAUGLIN S. Investigation and performance enhancement of the empirical mode decomposition method based on a heuristic search optimization approach[J].IEEE Trans Signal Processing,2008，56(1):1？13.
[12]
RILLING G, FLANDRIN P. One or two frequencies?The empirical mode decomposition answers[J].IEEE Trans Signal Processing,2008，56(1):85？95.？
？CHEN Dongfang, WU Xianliang. Recovery of signal from transient scattered response contaminated by Gaussian white noise based on EMD method[J].Acta Electronica S
