1Yan Y J,Hao H N,Yam L H.Vibration-based construction and extraction of structural damage feature index[J].International Journal of Solids and Structures,2004,41:6661-6676.
2Zou Y,Tong L-Steven G P.Vibrationbased moderdepend-ent damage(delmnination) identification and health monitoring for composite structures-A review[J].Journal of Sound and Vibration,2000,230(2):357-378.
2de Boor C. A practical guide to splines[M]. New York: Springer Verlag, 1978.
3Sehumaker L L. Spline functios: Basic theory[M]. New York:Wiley, 1981.
4Huang N E,Shen Z,Long S R,et al. The empirical mode deocomposition and the Hilbert spectrtrum for nonlinear and ram-station time series analysis[J]. Proc R Sex:, 1998,A454:903 - 995.
5Shuo M. HHT analysis of near-field seismic ground motions[D]. Denver: Colorado School of Mines, 2001.
