[PDF] Top 20 Time domain viscoelastic full waveform inversion.

... in full waveform inversion ...in time domain FWI, the displacement formulation of the wave equation is usually used instead of the popular velocity–stress ...However, inversion ... Voir le document complet

... the full elastic waveform inversion in the frequency domain in a 2-D ...the full elastic wavefield ...frequency domain, a fast approach for multisource and multireceiver ... Voir le document complet

... Synthetic time-lapse GPR full-waveform inversion for monitoring ethanol tracer test: Synthetic 3D flow and transport simulations (PARTRACE code, [8]) were used to generate a plume fate for ... Voir le document complet

... frequency-domain full wave- form inversion (FWI) on ocean-bottom cable data from the North ...by time-domain modeling and source wavelet estima- ... Voir le document complet

... the full elastic waveform inversion in the frequency domain in a 2-D ...the full elastic wavefield ...frequency domain, a fast approach for multisource and multireceiver ... Voir le document complet

... frequency domain approach is also suitable for second-order optimization methods such as the truncated Newton methods due to the efficiency of the modelling steps and our ability to keep in core memory several ... Voir le document complet

... savings could be achieved if it was computed near the Nyquist frequency. Nevertheless, this test shows that the cost of computing 546 the discrete Fourier transform during time stepping is not trivial but remains ... Voir le document complet

... to full waveform processing, which should lead to a significant improvement in the resolution of ...zone. Full waveform inversion is entirely implemented in the frequency domain, ... Voir le document complet

... as time domain reflectometry (TDR) and capacitance probes are re- vealing their best potentialities in recently deployed wireless sensors networks (Bogena et ... Voir le document complet

... Resolution analysis and source bandwidth We perform conventional FWI in the time domain for the 1D layer model. The initial model is homogeneous at 2 km/s. We analyze four FWI tests with diferent source ... Voir le document complet

... The main reason for the limitation in the applicability of FWI is related to what is usually referred to as cycle skipping, or phase ambiguity. In standard FWI, the oscillatory seismic data is matched in the ... Voir le document complet

... During waveform inversion, it is possible to remove the effect of the direct wavefield and re- produce this by simply subtracting the corresponding data, com- puted as a first step in the homogeneous ... Voir le document complet

... frequency domain ( Brossier et al. , 2009 ), or in the time domain, by means of finite-element methods ( Marfurt , 1984 ) or finite-difference methods ( Virieux , 1986 ...multi-parameter ... Voir le document complet

... performance, full waveform inversion is finally becoming feasible on select problems with promising results emerging from frequency-domain ...frequency domain Green’s functions for the ... Voir le document complet

... seismic inversion because if we update (insert, delete, or modify) the elastic properties or boundary geometries for one particular layer, we only need to update the propagator matrix in this layer and the ... Voir le document complet

... 1 Introduction At the eld scale, evaluating the soil water content spatial variability is an important issue for many research and engineering applications [1]. For in- stance, in catchment hydrology, as the soil ... Voir le document complet

... frequency domain provides a natural framework to exploit redundant wave- number coverage, thanks to wide-aperture illumination [Sirgue and Pratt, ...the inversion of the next ... Voir le document complet

... The very high velocity contrast between the background (300 m.s −1 ) and the concrete foundations (4000 m.s −1 ) generates energetic reflections. In addition, the close distance between the two structures is responsible ... Voir le document complet

... Figure 1.4: Intrinsic attenuation effects for one seismic trace in time domain left and normalized spectrum in frequency domain right, the solid red line is the acoustic wave, and the so[r] ... Voir le document complet

... step in the standard workflow only provides qualitative structures; • the formalism allows to consider a wide variety of imaging problems, and also multi-parameter estimation. FWI has, however, a significant drawback. ... Voir le document complet