LFA-tuned matrix-free multigrid method for the elastic Helmholtz equation
R Yovel, E Treister - SIAM Journal on Scientific Computing, 2024 - SIAM
We present an efficient matrix-free geometric multigrid method for the elastic Helmholtz
equation, and a suitable discretization. Many discretization methods had been considered in …
equation, and a suitable discretization. Many discretization methods had been considered in …
Appraisal of instantaneous phase-based functions in adjoint waveform inversion
Complex signal analysis allows separation of instantaneous envelope and phase of seismic
waveforms. Seismic attributes have long routinely been used in geological interpretation …
waveforms. Seismic attributes have long routinely been used in geological interpretation …
A numerical study of multi-parameter full waveform inversion with iterative regularization using multi-frequency vibroseis data
We study the inverse boundary value problem for time-harmonic elastic waves, for the
recovery of P-and S-wave speeds from vibroseis data or the Neumann-to-Dirichlet map. Our …
recovery of P-and S-wave speeds from vibroseis data or the Neumann-to-Dirichlet map. Our …
Toward an automatic full-wave inversion: Synthetic study cases
Full-waveform inversion (FWI) in seismic scenarios continues to be a complex procedure for
subsurface imaging that might require extensive human interaction in terms of model setup …
subsurface imaging that might require extensive human interaction in terms of model setup …
A hybrid shifted Laplacian multigrid and domain decomposition preconditioner for the elastic Helmholtz equations
E Treister, R Yovel - Journal of Computational Physics, 2024 - Elsevier
In this work we extend the shifted Laplacian approach to the elastic Helmholtz equation. The
shifted Laplacian multigrid method is a common preconditioning approach for the …
shifted Laplacian multigrid method is a common preconditioning approach for the …
[PDF][PDF] Shifted Laplacian multigrid for the elastic Helmholtz equation.
E Treister - arxiv preprint arxiv:1806.11277, 2018 - researchgate.net
The shifted Laplacian multigrid method is a well known approach for preconditioning the
indefinite linear system arising from the discretization of the acoustic Helmholtz equation …
indefinite linear system arising from the discretization of the acoustic Helmholtz equation …
[PDF][PDF] Computational methods for seismic imaging and monitoring
K Muhumuza - 2020 - dspace.uef.fi
Seismic imaging methods as tools for geophysical exploration provide excellent
opportunities for delineating spatial variations in subsurface properties and monitoring their …
opportunities for delineating spatial variations in subsurface properties and monitoring their …