122 citations · 441 across the 31 of their papers we have counts for
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Full Waveform Inversion and Lagrange Multipliers
Ali Gholami
Full-waveform inversion (FWI) is an effective method for imaging subsurface properties using sparsely recorded data. It involves solving a wave propagation problem to estimate mode…
On the connection between WRI and FWI: Analysis of the nonlinear term in the Hessian matrix
Ali Gholami, Hossein S. Aghamiry, Stephane Operto
Implementation of the standard full waveform inversion (FWI) poses difficulties as the initial model offsets from the true model. The wavefield reconstruction inversion (WRI) was p…
Localized Wavefield Inversion (LWI): an Adaptation of Multi-Block ADMM for Localized FWI
Hossein S. Aghamiry, Ali Gholami, Stephane Operto +1
Full-waveform inversion (FWI) is a high-resolution and computationally intensive imaging technique to reconstruct unknown parameters in the computational model in which the waves p…
Large-scale highly-accurate extended full waveform inversion using convergent Born series
Hossein S. Aghamiry, Ali Gholami, Kamal Aghazade +2
Full-waveform inversion (FWI) is a seismic imaging method that provides quantitative inference about subsurface properties with a wavelength-scale resolution. Its frequency-domain…
Multipliers waveform inversion
Ali Gholami, Hossein S. Aghamiry, Stéphane Operto
The full-waveform inversion (FWI) addresses the computation and characterization of subsurface model parameters by matching predicted data to observed seismograms in the frame of n…
ADMM-based full-waveform inversion for microseismic imaging
Hossein S. Aghamiry, Ali Gholami, Stéphane Operto +1
Full waveform inversion (FWI) is beginning to be used to characterize weak seismic events at different scales, an example of which is microseismic event (MSE) characterization. How…
Efficient extended-search space full-waveform inversion with unknown source signatures
Hossein S. Aghamiry, Frichnel W. Mamfoumbi-Ozoumet, Ali Gholami +1
Full waveform inversion (FWI) requires an accurate estimation of source signatures. Due to the coupling between the source signatures and the subsurface model, small errors in the…
Full Waveform Inversion with Adaptive Regularization
Hossein S. Aghamiry, Ali Gholami, Stéphane Operto
Regularization is necessary for solving nonlinear ill-posed inverse problems arising in different fields of geosciences. The base of a suitable regularization is the prior expresse…
Attenuation imaging by wavefield reconstruction inversion with bound constraints and total variation regularization
Hossein S. Aghamiry, Ali Gholami, Stéphane Operto
Wavefield reconstruction inversion (WRI) extends the search space of Full Waveform Inversion (FWI) by allowing for wave equation errors during wavefield reconstruction to match the…
ADMM-based multi-parameter wavefield reconstruction inversion in VTI acoustic media with TV regularization
Hossein S. Aghamiry, Ali Gholami, Stéphane Operto
Full waveform inversion (FWI) is a nonlinear waveform matching procedure, which suffers from cycle skipping when the initial model is not kinematically-accurate enough. To mitigate…
Robust Wavefield Inversion via Phase Retrieval
Hossein S. Aghamiry, Ali Gholami, Stéphane Operto
Extended formulation of Full Waveform Inversion (FWI), called Wavefield Reconstruction Inversion (WRI), offers potential benefits of decreasing the nonlinearity of the inverse prob…
Compound Regularization of Full-waveform Inversion for Imaging Piecewise Media
Hossein S. Aghamiry, Ali Gholami, Stéphane Operto
The nonlinear and ill-posed nature of full waveform inversion (FWI) requires us to use sophisticated regularization techniques to solve it. In most applications, the model paramete…
Implementing bound constraints and total-variation regularization in extended full waveform inversion with the alternating direction method of multiplier: application to large contrast media
Hossein S. Aghamiry, Ali Gholami, Stéphane Operto
Full waveform inversion (FWI) is a waveform matching procedure, which can provide a subsurface model with a wavelength-scale resolution. However, this high resolution makes FWI pro…
Improving full waveform inversion by wavefield reconstruction with the alternating direction method of multipliers
Hossein S. Aghamiry, Ali Gholami, Stephane Operto
Full waveform inversion (FWI) is an iterative nonlinear waveform matching procedure subject to wave-equation constraint. FWI is highly nonlinear when the wave-equation constraint i…