Non-linear conjugate gradient magnetotelluric inversion for 2-D anisotropic conductivities

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F12%3A00388144" target="_blank" >RIV/67985530:_____/12:00388144 - isvavai.cz</a>

Výsledek na webu

<a href="http://ebooks.gfz-potsdam.de/pubman/faces/viewItemFullPage.jsp?itemId=escidoc:65354:1" target="_blank" >http://ebooks.gfz-potsdam.de/pubman/faces/viewItemFullPage.jsp?itemId=escidoc:65354:1</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Non-linear conjugate gradient magnetotelluric inversion for 2-D anisotropic conductivities

Popis výsledku v původním jazyce

We report on the state of the art in the development of a non-linear conjugate gradient (NLCG) version of the 2-D inverse algorithm for magnetotelluric (MT) data over structures with arbitrary electrical anisotropy. The algorithm is based on the Occam inverse strategy. As a direct solver, our 2-D finite volume forward modeling program for structures with arbitrary anisotropy is employed, which is also further used to effectively evaluate parametric sensitivities by employing the reciprocity principle. Astandard Polak-Ribiere NLCG algorithm is then applied to minimize the inversion objective function which consists of a data misfit term and of regularization penalties applied to both the structure complexity and anisotropy throughout the model. The algorithm offers considerable savings to the computing time and memory demands due to both the reciprocity-based evaluation of the parametric sensitivities and on-line computation of products of the Jacobian and its transverse with a vector

Název v anglickém jazyce

Non-linear conjugate gradient magnetotelluric inversion for 2-D anisotropic conductivities

Popis výsledku anglicky

We report on the state of the art in the development of a non-linear conjugate gradient (NLCG) version of the 2-D inverse algorithm for magnetotelluric (MT) data over structures with arbitrary electrical anisotropy. The algorithm is based on the Occam inverse strategy. As a direct solver, our 2-D finite volume forward modeling program for structures with arbitrary anisotropy is employed, which is also further used to effectively evaluate parametric sensitivities by employing the reciprocity principle. Astandard Polak-Ribiere NLCG algorithm is then applied to minimize the inversion objective function which consists of a data misfit term and of regularization penalties applied to both the structure complexity and anisotropy throughout the model. The algorithm offers considerable savings to the computing time and memory demands due to both the reciprocity-based evaluation of the parametric sensitivities and on-line computation of products of the Jacobian and its transverse with a vector

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DE - Zemský magnetismus, geodesie, geografie

OECD FORD obor

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Projekt

<a href="/cs/project/GAP210%2F10%2F2227" target="_blank" >GAP210/10/2227: Regionální a globální rozložení elektrické vodivosti v zemském plášti z pozemních a satelitních pozorování</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Protokoll über das 24. Schmucker-Weidelt-Kolloquium für Elektromagnetische Tiefenforschung

ISSN

0946-7467

e-ISSN

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Svazek periodika

24

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

20

Strana od-do

187-206

Kód UT WoS článku

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EID výsledku v databázi Scopus

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