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dc.contributor.authorWillemsen, Lucas Abraham
dc.contributor.authorMalcolm, Alison E.
dc.contributor.authorHewett, Russell J.
dc.contributor.otherMassachusetts Institute of Technology. Earth Resources Laboratory
dc.date.accessioned2014-10-02T14:47:44Z
dc.date.available2014-10-02T14:47:44Z
dc.date.issued2013
dc.identifier.urihttp://hdl.handle.net/1721.1/90528
dc.description.abstractIn this abstract we present a method that allows arbitrary elements of the approximate Hessian to be estimated simultaneously. Preliminary theoretical and numerical investigations suggest that the number of forward models required for this procedure does not increase with the number of shots. As the number of shots increases this means that the cost of estimating these approximate Hessian entries becomes negligible relative to the cost of calculating the gradient. The most obvious application would be to estimate the diagonal of the approximate hessian. This can then be used as a very inexpensive preconditioner for optimization procedures, such as the truncated Newton method.en_US
dc.language.isoen_USen_US
dc.publisherMassachusetts Institute of Technology. Earth Resources Laboratoryen_US
dc.relation.ispartofseriesEarth Resources Laboratory Industry Consortia Annual Report;2013-34
dc.subjectFWI
dc.titleEfficient stochastic Hessian estimation for full waveform inversionen_US
dc.typeTechnical Reporten_US


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