3Condier J F, Fodiman P. Experimental characterization of wheel and rail surface roughness[J]. Journal of Sound and Vibration.2000,231 (3) :267 -272.
4Jian X,Dixon S, Grattan K T V, et al. A model for pulsed Rayleigh wave and optimal EMAT design [J]. Sensors and Actuators. A, Physical, 2006, 128 (2) : 296.
5Dixon S, Palmer S B. Wideband low frequency generation and detection of Lamb and Rayleigh waves using electromagnetic acoustic transducers (EMATs) [J]. Ultrasonics, 2004, 42 (10):1129.