Network asymptotics for high contrast impedance tomography

Conference · Wed May 01 00:00:00 EDT 1996

OSTI ID:251310

Borcea, L; Papanicolaou, G C ^[1]; Berryman, J G ^[2]

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1. Stanford Univ., CA (United States)
2. Lawrence Livermore National Lab., CA (United States)

Fluid contaminant plumes underground are often electrically conducting and, therefore, can be imaged using electrical impedance tomography. The authors introduce an output least-squares method for impedance tomography problems that have regions of high conductivity surrounded by regions of lower conductivity. The high conductivity is modeled on network approximation results from an asymptotic analysis and its recovery is based on this model. The smoothly varying part of the conductivity is recovered by a linearization process as is usual. The authors present the results of several numerical experiments that illustrate the performance of the method.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States); Department of the Air Force, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 251310
• Report Number(s): UCRL-JC-124307; CONF-951219-1; ON: DE96011550; CNN: Grant F49620-94-1-0436; Grant DMS96-22854; TRN: AHC29614%%38
• Resource Relation: Conference: Symposium on inverse problems: geophysical applications, Yosemite Fish Camp, CA (United States), 16-19 Dec 1995; Other Information: PBD: May 1996
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
HAZARDOUS MATERIALS
ENVIRONMENTAL TRANSPORT
PLUMES
TOMOGRAPHY
PERFORMANCE
REMEDIAL ACTION
IMAGE PROCESSING
ELECTRIC IMPEDANCE
ELECTRIC CONDUCTIVITY
LEAST SQUARE FIT