7 papers
Automatic Penalty Parameter Selection by Residual Whiteness Principle (RWP) and GCV for Full Waveform Inversion
Kamal Aghazade, Toktam Zand, Ali Gholami
Full-waveform inversion (FWI) is a powerful seismic imaging technique used to estimate high-resolution physical properties of subsurface structures by minimizing the misfit between…
Direct inversion of data-space Hessian for efficient time-domain extended-source waveform inversion using the multiplier method
Mahdi Sonbolestan, Ali Gholami
The augmented Lagrangian (AL) method has been successfully applied for solving the full waveform inversion (FWI) problem. In AL-based FWI, the Lagrange multipliers serve as source…
Robust acoustic and elastic full waveform inversion by adaptive Tikhonov-TV regularization
Kamal Aghazade, Ali Gholami
Full Waveform Inversion (FWI) is a powerful wave-based imaging technique, but its inherent ill-posedness and non-convexity lead to local minima and poor convergence. Regularization…
Weighted Lagrange Multiplier Method for Robust Source-Independent Waveform Inversion
Ali Gholami, Kamal Aghazade, Akshay Vishwakarma
The Lagrange multiplier method has proven highly effective for mitigating the ill-conditioning of full waveform inversion (FWI), enabling robust and computationally efficient algor…
Fast Azimuthally Anisotropic 3D Radon Transform by Generalized Fourier Slice Theorem
Ahmadreza Mokhtari, Ali Gholami
Expensive computation of the conventional sparse Radon transform limits its use for effective transformation of 3D anisotropic seismic data cubes. We introduce a fast algorithm for…
Optimal Space-Variant Anisotropic Tikhonov Regularization for Full Waveform Inversion of Sparse Data
Ali Gholami, Silvia Gazzola
Full waveform inversion (FWI) is a challenging, ill-posed nonlinear inverse problem that requires robust regularization techniques to stabilize the solution and yield geologically…