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Abstract

Summary

Pseudo-analytical method (PAM) holds the advantage of both low temporal and spatial dispersions, but it may generate large error in the complex-velocity media. Fourier finite-difference (FFD) method decomposes the PAM solution into a Fourier transform (FT) operator and a FD operator, it can achieve high accuracy and satisfactory stability in complex-velocity model during wave propagation. In this paper, we adopt a new solution to calculate the optimal FFD coefficients by minimizing the error of the FD operator based on least squares (LS). The numerical examples reveal that the LS-based FFD scheme we proposed can achieve greater accuracy with shorter operator than the LS-based FD method.

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/content/papers/10.3997/2214-4609.201801319
2018-06-11
2024-04-19

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References

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An Optimal Fourier Finite-difference Scheme for Acoustic Wave Modelling based on Least Squares
Conference Proceedings 2018, 1 (2018); https://doi.org/10.3997/2214-4609.201801319
/content/papers/10.3997/2214-4609.201801319
/content/papers/10.3997/2214-4609.201801319
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