Results 211 to 220 of about 15,593 (257)

Review of PSTD methods for transient electromagnetics

International Journal of Numerical Modelling: Electronic Networks, Devices and Fields, 2004
AbstractIn 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
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Developments in the transient electromagnetic method

First Break, 2007
Anton 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.
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Development and Prospect of Transient Electromagnetic Method

2016
Transient 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
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A partially staggered discontinuous Galerkin method for transient electromagnetics

Journal of Computational Physics, 2019
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Hongxin Qi, Yuheng Wang, Jie Zhang, Xianghui Wang, Jianguo Wang 0004   +4 more
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Aftereffects in the Transient Electromagnetic Method: Magnetic Viscosity

Russian Geology and Geophysics, 2022
Abstract 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
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z-transform-based methods for electromagnetic transient simulations

2008 IEEE Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century, 2007
This is an introductory paper on z-transform-based methods for electromagnetic transient simulations of power systems. Since the theory of the z-transform was originally developed for the analysis of time series data defined at equidistant time steps, simulation models developed using z-transforms can readily be used in electromagnetic transient ...
Taku Noda, Abner Ramirez
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Pulled Array Transient Electromagnetic Method PA ‐ TEM

Symposium on the Application of Geophysics to Engineering and Environmental Problems 1995, 1995
Steadily 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, F. Effersø, A.J. Christensen   +2 more
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Sensitivity functions of transient electromagnetic methods

Geophysics, 2014
ABSTRACT Any geophysical measurement is a filter through which the distribution of a certain physical parameter in the subsurface is seen, and the sensitivity function is a characteristic of the method that reveals the nature of this filter.
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Electromagnetic transient numerical integration methods

2010 8th World Congress on Intelligent Control and Automation, 2010
Electromagnetic transient simulation usually adopts numerical integration methods to solve algebraic or differential, partial differential equations. The electromagnetic transient simulation numerical integration methods include Trapezoidal, Backward Euler, Forward Euler, Simpson and Gear second order.
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Computational methods in transient electromagnetics. A selective survey

IEEE Computational Science and Engineering, 1994
We can now solve real-life problems in electromagnetics at all levels of complexity. Several popular algorithms are available to deal with the transient-scattering problem. They all solve either differential or integral equations in one form or another. No one method is best in all situations.
G.K. Gothard, D.A. Vechinski, S.M. Rao
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