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AD 2000 - From Simulation to Optimization
June 19-23, 2000
INRIA Sophia Antipolis
Sophia Antipolis, France |
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Organizers
George Corliss, Christele Faure, Andre Galligo, Andreas Griewank, Laurent Hascoet, Uwe Naumann
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Numerical experiments in the seismic inverse problem for 1D media with 3D propagation: combined use of layer stripping, optimization and automatic differentiation
by
Michel Cuer
Univ. Montpellier II and IFP
Coauthors: Bijan Mohammadi
Numerical experiments in the seismic inverse problem
for 1D media with 3D propagation: combined use of layer stripping, optimization
and automatic differentiation.
Michel Cuer and Bijan Mohammadi
Univ. Montpellier II and IFP
In seismic inverse problems for 1D media, it is well known that the layer
stripping method might suffer from numerical instabilities due to inaccurate evaluation of
sensitivities. These loss of accuracy introduces new local minima for the usual
least-square formulation and these minima might capture descent methods trajectories.
We shall present some numerical experiments on the combined use of layer stripping
and optimization for 1D media with 3D propagation in the acoustic case. We shallexamine the potentialities of automatic differentiation tools in such problems to improve
accuracy. We are therefore interested by the impact of AD in real life applications.
Date received: February 28, 2000
Copyright © 2000 by the author(s).
The author(s) of this document and the organizers of the conference
have granted their consent to include this abstract in
Atlas Conferences Inc.
Document # cads-93.