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- W2397409984 abstract "Abstract An improved modeling algorithm using frequency-adaptive meshes is applied to meet the computational requirements of all seismic frequency components. It automatically adopts coarse meshes for low-frequency computations and fine meshes for high-frequency computations. The grid intervals are adaptively calculated based on a smooth inversely proportional function of grid size with respect to the frequency. In regular grid-based methods, the uniform mesh or non-uniform mesh is used for frequency-domain wave propagators and it is fixed for all frequencies. A too coarse mesh results in inaccurate high-frequency wavefields and unacceptable numerical dispersion; on the other hand, an overly fine mesh may cause storage and computational overburdens as well as invalid propagation angles of low-frequency wavefields. Experiments on the Pade generalized screen propagator indicate that the Adaptive mesh effectively solves these drawbacks of regular fixed-mesh methods, thus accurately computing the wavefield and its propagation angle in a wide frequency band. Several synthetic examples also demonstrate its feasibility for seismic modeling and migration." @default.
- W2397409984 created "2016-06-24" @default.
- W2397409984 creator A5070888010 @default.
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- W2397409984 date "2016-08-01" @default.
- W2397409984 modified "2023-10-16" @default.
- W2397409984 title "Numerical modeling of seismic waves using frequency-adaptive meshes" @default.
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- W2397409984 doi "https://doi.org/10.1016/j.jappgeo.2016.05.011" @default.
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