Publication: Calculation of the gradient of Tikhonov's functional in solving coefficient inverse problems for linear partial differential equations
Дата
2022
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© 2021 Walter de Gruyter GmbH, Berlin/Boston 2021.A fast algorithm for calculating the gradient of the Tikhonov functional is proposed for solving inverse coefficient problems for linear partial differential equations of a general form by the regularization method. The algorithm is designed for problems with discretized differential operators that linearly depend on the desired coefficients. When discretizing the problem and calculating the gradient, it is possible to use the finite element method. As an illustration, we consider the solution of two inverse problems of elastography using the finite element method: finding the distribution of Young's modulus in biological tissue from data on its compression and a similar problem of determining the characteristics of local oncological inclusions, which have a special parametric form.
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Sharov, A. N. Calculation of the gradient of Tikhonov's functional in solving coefficient inverse problems for linear partial differential equations / Sharov, A.N., Yagola, A.G., Leonov, A.S. // Journal of Inverse and Ill-Posed Problems. - 2022. - 10.1515/jiip-2020-0109
URI
https://www.doi.org/10.1515/jiip-2020-0109
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https://openrepository.mephi.ru/handle/123456789/28565
https://www.scopus.com/record/display.uri?eid=2-s2.0-85110389348&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000891639900003
https://openrepository.mephi.ru/handle/123456789/28565