Blar i Department of Earth Science på forfatter "Xiang, Kui"
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Homotopy method for seismic modeling in strongly scattering acoustic media with density variation
Xiang, Kui; Jakobsen, Morten; Eikrem, Kjersti Solberg; Nævdal, Geir (Journal article; Peer reviewed, 2020)The wave equation for acoustic media with variable density and velocity can be transformed into an integral equation of the Lippmann-Schwinger type; but for a 4-dimensional state vector involving the gradient of the pressure ... -
Homotopy scattering series for seismic forward modelling with variable density and velocity
Xiang, Kui; Eikrem, Kjersti Solberg; Jakobsen, Morten; Nævdal, Geir (Journal article; Peer reviewed, 2021)We have derived a convergent scattering series solution for the frequency-domain wave equation in acoustic media with variable density and velocity. The convergent scattering series solution is based on the homotopy analysis ... -
A matrix-free variant of the distorted Born iterative method for seismic full-waveform inversion
Xiang, Kui; Jakobsen, Morten; Eikrem, Kjersti Solberg; Nævdal, Geir (Journal article; Peer reviewed, 2023)The distorted Born iterative method reduces a nonlinear inverse scattering problem to a sequence of (ill-posed) linear inverse scattering problems that can be solved using a regularized least-squares formulation. This ... -
Scattering approaches to modelling and inversion of acoustic and elastic waveform data
Xiang, Kui (Doctoral thesis, 2023-11-16)Spredningsmetoden er kraftig for å løse direkte og inverse spredningsproblemer i forskjellige bølgespredningsscenarioer. Full bølgeforminversjon, sett på som et ikke-lineært invers spredningsproblem, fremstår som en sentral ...