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math.NA2025★ 9 cited
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…
math.NA2024
Automatic nonstationary anisotropic Tikhonov regularization through bilevel optimization
Silvia Gazzola, Ali Gholami
Regularization techniques are necessary to compute meaningful solutions to discrete ill-posed inverse problems. The well-known 2-norm Tikhonov regularization method equipped with a…
math.NA2023
Optimising seismic imaging design parameters via bilevel learning
Shaunagh Downing, Silvia Gazzola, Ivan G. Graham +1
Full Waveform Inversion (FWI) is a standard algorithm in seismic imaging. Its implementation requires the a priori choice of a number of "design parameters", such as the positions…