Earth-prints repository, logo   Istituto Nazionale di Geofisica e Vulcanologia

Istituto Nazionale di Geofisica e Vulcanologia
 
|earth-prints home page | roma library | bologna library | catania library | milano library | napoli library | palermo library

Advanced Search
Earth-Prints Archive Policy
Why should you use Earth-prints?
 
Browse
Subjects
Titles
Authors
By Date
Keywords
 
Sign on to:
Receive email
updates
My DSpace
authorized users
Edit Profile
 
About DSpace

Earth-prints >
Affiliation >
External Contributions >
Conference materials >

Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/1833

Share this record with your favourite social network:     Del.icio.us     Citeulike     Connotea
Facebook     Stumble it!     reddit    
Title: Focusing inversion techniques applied to electrical resistance tomography in an experimental tank
Authors: Pagliara, G.*
Vignoli, G.*
Keywords: ERT
electrical tomography
minimum gradient support
complete electode model
regularization
Issue Date: 3-Sep-2006
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.
URI: http://hdl.handle.net/2122/1833
URL: http://arxiv.org/ftp/physics/papers/0606/0606234.pdf
Appears in Collections:Conference materials
05.06.99. General or miscellaneous

Files in This Item:

File Description SizeFormat
0606234.pdf583.87KbAdobe PDFView/Open
  • 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.

This item is licensed under a Creative Commons License
Creative Commons

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 
Valid XHTML 1.0! ICT Support, development & maintenance are provided by theAePIC team @CILEA.Powered onDSpace Software. Feedback