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

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About: Non-linear conjugate gradient magnetotelluric inversion for 2-D anisotropic conductivities Goto Sponge NotDistinct Permalink

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Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://ebooks.gfz-potsdam.de/pubman/faces/viewItemFullPage.jsp?itemId=escidoc:65354:1
Description	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. A standard 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 within the CG algorithm. 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. A standard 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 within the CG algorithm. (en)
Title	Non-linear conjugate gradient magnetotelluric inversion for 2-D anisotropic conductivities Non-linear conjugate gradient magnetotelluric inversion for 2-D anisotropic conductivities (en)
skos:prefLabel	Non-linear conjugate gradient magnetotelluric inversion for 2-D anisotropic conductivities Non-linear conjugate gradient magnetotelluric inversion for 2-D anisotropic conductivities (en)
skos:notation	RIV/67985530:_____/12:00388144!RIV13-AV0-67985530
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GAP210/10/2227)
http://linked.open...iv/cisloPeriodika	1
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Pek, Josef
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Geofyzikální ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	154394
http://linked.open...ai/riv/idVysledku	RIV/67985530:_____/12:00388144
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	magnetotelluric method; electrical conductivity anisotropy; non-linear conjugate gradient; inverse problem (en)
http://linked.open.../riv/klicoveSlovo	inverse problem electrical conductivity anisotropy magnetotelluric method non-linear conjugate gradient
http://linked.open...odStatuVydavatele	DE - Spolková republika Německo
http://linked.open...ontrolniKodProRIV	[77D626E1B2DC]
http://linked.open...i/riv/nazevZdroje	Protokoll über das 24. Schmucker-Weidelt-Kolloquium für Elektromagnetische Tiefenforschung
http://linked.open...in/vavai/riv/obor	DE
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...vavai/riv/projekt	Regional and global distribution of the electrical conductivity in the Earth’s mantle from ground-based and satellite observations
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	24
http://linked.open...iv/tvurceVysledku	Pek, Josef Li, Y. Santos, F. A. M.
issn	0946-7467
number of pages	20 (xsd:int)

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