Results 181 to 190 of about 1,198 (214)
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Cross‐borehole electrical resistivity tomography
SEG Technical Program Expanded Abstracts 1990, 1990Tomographic imaging (Hounsfield, 1974) has revolutionized medical X-ray diagnostics and is now a valuable technique in many areas of science. In geophysics, tomographic images have been constructed from both seismic and electromagnetic measurements (Anderson and Dziewonski, 1984; Dines and Lytle, 1979).
William D. Daily +2 more
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Non-Iterative Imaging Method for Electrical Resistance Tomography
2009Electrical Resistance Tomography (ERT) is a body of methods and techniques aimed to reconstruct the spatial distribution of the resistivity of a material starting from the knowledge of boundary measurements such as, for instance, the Neumann-to-Dirichlet map.
Flavio Calvano +2 more
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Regularization Parameter considering Electric Field Attenuation for Electrical Resistance Tomography
2020 IEEE International Instrumentation and Measurement Technology Conference (I2MTC), 2020Electrical resistance tomography (ERT) is widely used to reconstruct internal conductivity distribution of the measured field from the boundary data. The inverse problem of ERT is seriously ill-posed and nonlinear. Tikhonov regularization method is a well-known method to solve the problem.
Sitong Chen, Yanbin Xu, Feng Dong 0001
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QERT - Quadrupole Electrical Resistivity Tomography
2020<p><span>The quadrupole technique for geoelectrics yields the apparent resistivity in a tensorial form in contrast to the scalar apparent resistivity obtained from classical geoelectrics. The quadrupole method in geoelectrics has been applied in the past only for long offsets between transmitter and receiver.
Viktor Nawa, Andreas Junge
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Electrical resistance tomography for process applications
Measurement Science and Technology, 1996Measurement of electrical resistivity via four probes is widely used in a variety of applications ranging from geophysical prospecting to silicon wafer manufacture. Electrical resistivity tomography is an extension of this approach and is performed via an array of equi-spaced electrodes mounted into the periphery of a process vessel to map non ...
Fraser Dickin, Mi Wang
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Electrical resistivity tomography for petrophysical investigation
4th EEGS Meeting, 1998Determination of physical parameters of rock samples is essential to characterize their composition and structure. One of these parameters is electrical resistivity. Depending on porosity, resistivity of the pore fluid, saturation degree and matrix properties (esp.
A. Just +4 more
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DC Electrical Resistance Tomography Inversion
2021Direct current electrical resistivity imaging is provided by measuring the vertical and horizontal electrical potential variations of subsurface structures using surface and borehole records. To recover the resistivity tomograms from the observed data, a non-linear inverse problem is required to be iteratively solved. A 2.5-dimensional forward modeling
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An Electrical Resistive Tomography Based on Direct Information
2004An approach to non destructive testing suitable for solving a class of particular inverse problems whose peculiarity is to have the defect electrically accessible is proposed. The impact of this feature on the mathematical formulation of the problem and the advantages in terms of improvement of the sensitivity of the measurement system are discussed ...
MARTONE, Raffaele +2 more
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Electrical Resistivity Tomography Investigations
Symposium on the Application of Geophysics to Engineering and Environmental Problems 2012, 2012Evgeniy Torgashov +3 more
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Best practices for using electrical resistivity tomography to investigate permafrost
Permafrost and Periglacial Processes, 2023Teddi Herring +2 more
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