Results 211 to 220 of about 16,981 (259)
Some of the next articles are maybe not open access.
The application of the transient electromagnetic method in hydrogeophysical surveys
Journal of Applied Geophysics, 2003The transient electromagnetic (TEM) method has been used extensively for hydrogeophysical exploration in Denmark for the past decade. Innovative instrumentation combined with multi-dimensional modelling and interpretational insights based on experience gained through numerous case studies have proven to be a successful strategy.
Danielsen, J.E. +4 more
openaire +4 more sources
Computational issues of an electromagnetics transient meshless method
AIP Conference Proceedings, 2019In this paper we refer to the computational issues in solving Maxwell’ s curl equations without using any connectivity among the points in which the problem domain is discretized. The adopted procedure is able to approximate the electric and magnetic vector fields making use of the derivatives of a kernel function at points arranged in the ...
Francomano Elisa +3 more
openaire +1 more source
Interpolation method for transient electromagnetic fields
Il Nuovo Cimento C, 1989The method for the transient electromagnetic fields interpolation from the irregular to the uniform array is suggested. It is based on the approximation of the observed data by the field of the current plane disposed at some depth in the homogeneous conductive Earth.
M. S. Zhdanov +2 more
openaire +1 more source
An Optimized Method for Transient Electromagnetic Field
2011During the forward transformation of wave-field, two-step optimized algorithm is used for decreasing the number of integral coefficients and sampling in dispersed digital integral, as while as ensure transient electromagnetic field’s calculation precision.
Nannan Zhou, Guoqiang Xue, Xiu Li 0001
openaire +2 more sources
Review of PSTD methods for transient electromagnetics
International Journal of Numerical Modelling: Electronic Networks, Devices and Fields, 2004AbstractIn this paper we review the recent development in pseudospectral time‐domain (PSTD) methods for broadband electromagnetics. Starting from the basic ideas for high‐order approximation of spatial derivatives in periodic and non‐periodic domains, we will discuss the pseudospectral time‐domain methods for Maxwell's equations.
Liu, Qing Huo, Zhao, Gang
openaire +1 more source
Developments in the transient electromagnetic method
First Break, 2007Anton Ziolkowski describes how his interest in the use of transient EM for hydrocarbon exploration and production developed initially through research and more recently with the formation of a company to commercialize the method.
openaire +1 more source
A partially staggered discontinuous Galerkin method for transient electromagnetics
Journal of Computational Physics, 2019zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Hongxin Qi +4 more
openaire +2 more sources
Aftereffects in the Transient Electromagnetic Method: Magnetic Viscosity
Russian Geology and Geophysics, 2022Abstract One of the aftereffects inherent in geological materials is magnetic viscosity. This phenomenon consists in the time lag of changes in magnetic characteristics in relation to changes in the external magnetic field. In rocks, magnetic viscosity is mainly associated with magnetization of superparamagnetic particles.
N.O. Kozhevnikov, E.Yu. Antonov
openaire +1 more source
Development and Prospect of Transient Electromagnetic Method
2016Transient Electromagnetic Method was first proposed by Soviet scientists in the 1930s that worked in far-field zone. The time-domain electromagnetic method with a dipole induced by a pulse current was proposed by Blau in 1933. Based on the similarity of electromagnetic wave at the formation interfaces of different conductivities with reflection signal ...
Xiu Li, Guoqiang Xue, Changchun Yin
openaire +1 more source
Pulled Array Transient Electromagnetic Method PA ‐ TEM
Symposium on the Application of Geophysics to Engineering and Environmental Problems 1995, 1995Steadily growing abstraction of ground water together with the impact of pollution from surface infiltration have increased the need for hydrogeological investigations of aquifers. The mapping of subsurface resistivity structures using electrical and electromagnetic methods has gained a central role in the set-up of hydrogeological models of catchments
K.I. Sørensen +2 more
openaire +1 more source