Top PDF Waveform inversion based on wavefield decomposition
Waveform inversion based on wavefield decomposition
... The short wavelengths provide the ine structure of the subsurface model, allowing to lo- calize relectors in depth. The short wavelengths can be obtained by migration techniques, assuming the background velocity is ...
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Time domain viscoelastic full waveform inversion.
... 4.4 Inversion of baseline data The initial model used to invert the baseline data is a smoothed version of the true model (second column of ...tomography based on ray ...the waveform contains only ...
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Two-dimensional elastic full waveform inversion using Born and Rytov formulations in the frequency domain
... elastic waveform inversion in the frequency domain in a 2-D ...non-linear inversion is based on a pre-conditioned gradient method, where Born and Rytov formulations are used to compute ...
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Compound Regularization of Full-Waveform Inversion for Imaging Piecewise Media
... Full-waveform Inversion for Imaging Piecewise Media Hossein ...Abstract—Full waveform inversion (FWI) is an iterative nonlin- ear waveform matching procedure, which seeks to reconstruct ...
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Full Waveform Inversion and the truncated Newton method
... is based on a realistic ...the inversion scheme for all the following experiments, which results in a reduction of the parameter space and a stabilization of the problem: since these parameters are close ...
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The truncated Newton method for Full Waveform Inversion
... double-scattered wavefield ∂ pp u s (p) and the residuals R s u s (p) − d s ...multiscattered wavefield for this test case is weak, and the l-BFGS method is ...
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Two-dimensional elastic full waveform inversion using Born and Rytov formulations in the frequency domain
... elastic waveform inversion in the frequency domain in a 2-D ...non-linear inversion is based on a pre-conditioned gradient method, where Born and Rytov formulations are used to compute ...
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ADMM-based multiparameter wavefield reconstruction inversion in VTI acoustic media with TV regularization
... Bilinearity allows us to recast the parameter estimation sub- problem as a linear subproblem and hence the waveform inversion as a biconvex problem. Although ADMM has been originally de- veloped to solve ...
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Inversion of noisy Radon transform by SVD based needlet
... to obtain the right rates of convergence in L p norms. The paper is structured as follows. In Section 2 we introduce the model and the Radon transform Singular Value Decomposition. In Section 3 we give the class ...
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The potential of time-lapse GPR full-waveform inversion as high resolution imaging technique for salt and ethanol transport
... full-waveform inversion, crosshole, ...ray-based inversion methods for ground penetrating radar (GPR) data [1], the full-waveform inversion (FWI) of crosshole GPR data has shown ...
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Soil surface water content estimation by full-waveform GPR signal inversion in the presence of thin layers
... dierent from the GPR characterization scale (order of 2500 cm 2 ), and this is in relation to the inherent heterogeneity. The mean con dence interval at 95%, calculated for each mix of humid sand, is equal to 0.010. ...
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Carbon sequestration monitoring with acoustic double-difference waveform inversion: A case study on SACROC walkaway VSP data
... Figure 5 shows the waveform inversion result of the baseline, 2008 data. The velocity update to the starting model for the inversion of the 2009 data is displayed in the left panel of Fig- ure 6. It ...
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Lagrange–Schwarz Waveform Relaxation domain decomposition methods for linear and nonlinear quantum wave problems
... Schwarz Waveform Relaxation (SWR) algorithm is proposed to solve by Domain Decomposition Method (DDM) linear and nonlinear Schr¨ odinger ...Schwarz Waveform Relaxation (OSWR) algorithms are ...
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Time-domain seismic modeling in viscoelastic media for full waveform inversion on heterogeneous computing platforms with OpenCL.
... 203 Once the gradient is computed, different algorithms can be used to solve the inversion system, from the steepest descent to the full 204 Newton method (Virieux and Operto, 2009). This issue is not the focus of ...
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Combined traveltime and frequency-domain seismic waveform inversion: : a case study on multi-offset ultrasonic data
... traveltime inversion to the model of Fig. 11(b). Usually, traveltime inversion is only applied as a preliminary step to waveform inver- sion (Pratt 1999; Pratt & Shipp 1999) but the strong ...
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Energy Based Functional Decomposition in Preliminary Design
... reference Process 27 0.6% Convert/control Mix 27 0.6% Transmit Why is this reduction in the number of verbs so sought after? Stone, Wood and researchers who use Hirtz’ functional base wanted to increase the number of ...
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Learnable Empirical Mode Decomposition based on Mathematical Morphology
... Figure 2. a) Original signal, b) Flat dilation/erosion based Morphological Empirical Mode (1.7) with a disk of λ = 5, c) Quadratic dilation/erosion based Morphological Empirical Mode (2.3) with λ = 3. ...
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Asymptotic waveform inversion for unbiased velocity and attenuation measurements: numerical tests and application for Vesuvius lava sample analysis
... 5 C O N C L U S I O N The viscoacoustic tomography presented in this paper provides the attenuation Q-factor and velocity of heterogeneities without any trade-off between the two classes of parameters. To verify these ...
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Wavelet-based multiscale proper generalized decomposition
... Generalized Decomposition methods, are considered when solving at-hand partial differential equations by employing procedures based on the separation of ...
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A Domain Decomposition technique for complex geometries based on the Proper Generalized Decomposition
... Generalized Decomposition can obtain 3D solutions while keeping the 2D complexity of 2D shell ...technique, based on the Domain Decomposition technique, that is able to generate complex geometries ...
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