A Massively Parallel Method for the Full Waveform Inversion in Geophysics: Current Status and Perspectives

In addition, the truncated Newton method offers the possibility of using the approxima- tions of the inverse Hessian operator which have been developed in the context of

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Les salariés à temps partiel rémunérés au Smic perçoivent également relativement plus de majorations pour heures com- plémentaires que les autres sala- riés à temps partiel : 1,9

1.1.2 NESS of chains of oscillators perturbed by an energy conserving noise The models defined in the previous sections can also be considered in a non- equilibrium stationary

Reflection waveform inversion (RWI) and its alternative - joint full waveform inversion (JFWI), are powerful tools for improving initial velocity model building beyond the

Figure 5: Convergence speed for near-surface application test case: steepest descent (red), l-BFGS (green), Gauss-Newton (blue), Newton (purple).. Figure 6: Near-surface test

In this context, the computational cost (per shot) of one GN or one EN nonlinear iteration amounts to the resolution of 2 forward simulations for the computation of the gradient plus