FORWARD MODELING AND WAVE FIELD ANALYSIS OF 2D RAYLEIGH WAVE BASED ON IRREGULAR TOPOGRAPHY
A free surface condition for Numerical Simulation of Rayleigh wave has been built by using high precision staggered grids finite difference.The result of two inclined layer model simulating shows that error between numerical and analytic solutions is almost equivalent,which proves that Numerical Simulation of Rayleigh wave based on irregular topography is correct.Basis on this,we have got the propagation characteristics of Rayleigh wave from modeling a small heave topography and a small depressed topography models.Finding that there are reflection,waveform transformation and re-allocation of energy in the course of passing topography.Therefore,the effect of irregular topography must be considered when Rayleigh surface wave exploration is used.
OBJECTIVE ::: To establish a new method to discriminate Aaron's beard by Fourier transformation infrared spectrometry. ::: ::: ::: METHODS ::: Attenuation Reflection-Fourier transformation infrared spectrometry with clustering analysis was used to the identification of Aaron's beard. ::: ::: ::: RESULTS ::: There were obvious differences in Aaron's beard. The results are consistent with that of morphologic study. ::: ::: ::: CONCLUSION ::: This method is rapid, simple and economical, and can be used to the quality control.