Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/1833
DC Field | Value | Language |
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dc.contributor.authorall | Pagliara, G.; Math4Tech, Mathematics Department, University of Ferrara, Italy | en |
dc.contributor.authorall | Vignoli, G.; L.A.R.A. Group, Earth Sciences Department, University of Ferrara, Italy | en |
dc.date.accessioned | 2006-12-03T01:00:58Z | en |
dc.date.available | 2006-12-03T01:00:58Z | en |
dc.date.issued | 2006-09-03 | en |
dc.identifier.uri | http://hdl.handle.net/2122/1833 | en |
dc.description.abstract | We present an algorithm for focusing inversion of electrical resistivity tomography (ERT) data. ERT is a typical example of ill-posed problem. Regularization is the most common way to face this kind of problems; it basically consists in using a priori information about targets to reduce the ambiguity and the instability of the solution. By using the minimum gradient support (MGS) stabilizing functional, we introduce the following geometrical prior information in the reconstruction process: anomalies have sharp boundaries. The presented work is embedded in a project (L.A.R.A.) which aims at the estimation of hydrogeological properties from geophysical investigations. L.A.R.A. facilities include a simulation tank (4 m x 8 m x 1.35 m); 160 electrodes are located all around the tank and used for 3-D ERT. Because of the large number of electrodes and their dimensions, it is important to model their effect in order to correctly evaluate the electrical system response. The forward modelling in the presented algorithm is based on the so-called complete electrode model that takes into account the presence of the electrodes and their contact impedances. In this paper, we compare the results obtained with different regularizing functionals applied on a synthetic model. | en |
dc.format.extent | 597886 bytes | en |
dc.format.mimetype | application/pdf | en |
dc.language.iso | English | en |
dc.relation.ispartof | IAMG’2006 Annual Conference | en |
dc.subject | ERT | en |
dc.subject | electrical tomography | en |
dc.subject | minimum gradient support | en |
dc.subject | complete electode model | en |
dc.subject | regularization | en |
dc.title | Focusing inversion techniques applied to electrical resistance tomography in an experimental tank | en |
dc.type | Extended abstract | en |
dc.description.status | Published | en |
dc.identifier.URL | http://arxiv.org/ftp/physics/papers/0606/0606234.pdf | en |
dc.subject.INGV | 05. General::05.06. Methods::05.06.99. General or miscellaneous | en |
dc.description.ConferenceLocation | Liège,Belgique | en |
dc.relation.references | Blaschek R., Hördt A., Kemna A., 2005. A new regularization for the inversion of IP data based on the minimum gradient support. Proc. EAGE Near Surface 2005: 270-275. Polydorides N., 2002, Image Reconstruction Algorithms for Soft-Field Tomography. Manchester: Ph.D. thesis. Portniaguine O. and Zhdanov M. S., 1999. Focusing geophysical inversion images. Geophysics (64): 874-887. Vignoli G. and Zhdanov M. S., 2004. Sharp boundary imaging in croswell seismic tomography, Proc. Ann. Mtg. Consortium for Electromagnetic Modeling and Inversion: 155-172. Vignoli G. and Zanzi L., 2005. Focusing inversion technique applied to radar tomographic data. Proc. EAGE Near Surface 2005: 270-275. Zhdanov M. S., 2002. Geophysical Inverse Theory and Regularization problems. Amsterdam: North- Holland/American Elsevier. | en |
dc.description.fulltext | open | en |
dc.contributor.author | Pagliara, G. | en |
dc.contributor.author | Vignoli, G. | en |
dc.contributor.department | Math4Tech, Mathematics Department, University of Ferrara, Italy | en |
dc.contributor.department | L.A.R.A. Group, Earth Sciences Department, University of Ferrara, Italy | en |
item.openairetype | Extended abstract | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | open | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Math4Tech, Mathematics Department, University of Ferrara, Italy | - |
crisitem.author.dept | Università di Ferrara, Dipartimento di Scienze della Terra, Via Saragat 1, 4100 Ferrara, Italy | - |
crisitem.classification.parent | 05. General | - |
Appears in Collections: | Conference materials |
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0606234.pdf | 583.87 kB | Adobe PDF | View/Open |
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