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  1. No Access

    Article

    PML and CFS-PML boundary conditions for a mesh-free finite difference solution of the elastic wave equation

    Mesh-free finite difference (FD) methods can improve the geometric flexibility of modeling without the need for lattice map** or complex meshing process. Radial-basis-function-generated FD is among the most ...

    Cheng-Yu Sun, Shi-Zhong Li, Ning Xu in Applied Geophysics (2019)

  2. No Access

    Article

    Nonlinear Rayleigh wave inversion based on the shuffled frog-lea** algorithm

    At present, near-surface shear wave velocities are mainly calculated through Rayleigh wave dispersion-curve inversions in engineering surface investigations, but the required calculations pose a highly nonline...

    Cheng-Yu Sun, Yan-Yan Wang, Dun-Shi Wu, **ao-Jun Qin in Applied Geophysics (2017)

  3. No Access

    Article

    Wide-angle incidence and P-wave transmission

    Polarity reversals may occur to transmitted P waves if the incidence angle is greater than the critical incidence angle. We analyze the characteristics of reflection and transmission coefficients under the con...

    Jun-Fa **e, Cheng-Yu Sun, Mei-Yan Lin, **g-**g Li in Applied Geophysics (2015)

  4. No Access

    Article

    Reservoir time-lapse variations and coda wave interferometry

    Coda waves are multiply scattered waves that arrive much later than the major waves. Small seismic velocity variations are observed in reservoirs because of small variations in reservoir properties, which affe...

    Jie Tang, **g-**g Li, Zhen-An Yao, Jie Shao, Cheng-Yu Sun in Applied Geophysics (2015)