Extending the search space of time-domain adjoint-state FWI w/ randomized implicit time shifts

TitleExtending the search space of time-domain adjoint-state {FWI} w/ randomized implicit time shifts
Publication TypeSINBAD Presentation
AuthorsMathias Louboutin, Felix J. Herrmann
PublisherSINBAD
Year of Publication2015
Abstract

We introduce a modified adjoint-state method for time domain FWI that allows us to extend the research space. As a result, we arrive at a formulation where the sensitivity to cycle skipping is reduced. Our method obtains results with the same computational costs as FWI (The PDE solved is the same) but with significantly reduced memory costs. We use new results in non-convex optimization to justify the method as well as new regularization techniques and stochastic optimization to improve the behavior of the algorithm.

KeywordsPresentation, private, SINBAD, SINBADFALL2015, SLIM
URLhttps://slim.gatech.edu/Publications/Private/Conferences/SINBAD/2015/Fall/louboutin2015SINBADFess/louboutin2015SINBADFess.pdf
URL1

https://slim.gatech.edu/Publications/Private/Conferences/SINBAD/2015/Fal...

Citation Keylouboutin2015SINBADFess