Evidence of Hierarchy in the Complex Fractured System of Geropotamos (Crete, Greece), as Extracted from Transient Electromagnetic Responses
Sign Up to like & getrecommendations! Published in 2018 at "Pure and Applied Geophysics"
DOI: 10.1007/s00024-018-1835-8
Abstract: The essential goals of this paper are to test the transient electromagnetic (TEM) response in a fractured geological complex medium and to better understand the physics introduced by associating a roughness parameter β to the… read more here.
Keywords: hierarchy complex; complex fractured; evidence hierarchy; transient electromagnetic ... See more keywords
Constraining a density-dependent flow model with the transient electromagnetic method in a coastal aquifer in Mexico to assess seawater intrusion
Sign Up to like & getrecommendations! Published in 2019 at "Hydrogeology Journal"
DOI: 10.1007/s10040-019-02024-w
Abstract: Saltwater intrusion is one of the most pressing environmental concerns in coastal areas with increased water demands. Water extraction decreases the level of fresh groundwater, reducing the water pressure and allowing saltwater to flow further… read more here.
Keywords: coastal aquifer; intrusion; transient electromagnetic; saltwater intrusion ... See more keywords
Numerical analysis of multicomponent responses of surface-hole transient electromagnetic method
Sign Up to like & getrecommendations! Published in 2017 at "Applied Geophysics"
DOI: 10.1007/s11770-017-0600-6
Abstract: We calculate the multicomponent responses of surface-hole transient electromagnetic method. The methods and models are unsuitable as geoelectric models of conductive surrounding rocks because they are based on regular local targets. We also propose a… read more here.
Keywords: electromagnetic fields; analysis; method; transient electromagnetic ... See more keywords
A Kirchhoff migration imaging method based on grounded-source TEM virtual wave-fields and its applications
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Applied Geophysics"
DOI: 10.1016/j.jappgeo.2019.03.015
Abstract: Abstract This research study was based on a Kirchhoff migration imaging method, and the aim of the study was to realize grounded-source transient electromagnetic virtual wave-field migration. Diffusion equations mainly characterize the induction characteristics of… read more here.
Keywords: kirchhoff migration; migration imaging; wave fields; grounded source ... See more keywords
New method for denoising borehole transient electromagnetic data with discrete wavelet transform
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Applied Geophysics"
DOI: 10.1016/j.jappgeo.2019.05.009
Abstract: Abstract Discrete wavelet transform (DWT) has been widely used as a useful tool in denoising geophysical data for its outstanding feature of detecting singularities and transients. In this paper, we develop a new strategy of… read more here.
Keywords: discrete wavelet; denoising borehole; wavelet transform; transient electromagnetic ... See more keywords
A transient electromagnetic signal denoising method based on an improved variational mode decomposition algorithm
Sign Up to like & getrecommendations! Published in 2021 at "Measurement"
DOI: 10.1016/j.measurement.2021.109815
Abstract: Abstract Transient electromagnetic method (TEM) is often disturbed by surrounding noise in field measurement, which leads to low resolution of data and affects accurate positioning of geological anomalies. In order to solve this problem, an… read more here.
Keywords: decomposition; improved variational; variational mode; algorithm ... See more keywords
Wave transforms of transient electromagnetic field in conductive earth
Sign Up to like & getrecommendations! Published in 2017 at "Russian Geology and Geophysics"
DOI: 10.1016/j.rgg.2016.09.031
Abstract: Abstract The study aims at finding a stable method for transformation of time-domain electromagnetic diffusion field to an electromagnetic wavefield. Two ways of transformation are considered: singular-value decomposition (SVD) and Tikhonov’s regularizations. Transformation is applied… read more here.
Keywords: electromagnetic field; wave transforms; field; transforms transient ... See more keywords
2.5-D Inversion of Advanced Detection Transient Electromagnetic Method in Full Space
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DOI: 10.1109/access.2019.2962963
Abstract: The transient electromagnetic method (TEM) can be applied in detecting coal mining heading face with multiple angles. However, a 1-D inversion scheme cannot fit this kind of multi-angle data-receiving system well, nor reducing detection accuracy.… read more here.
Keywords: inversion; method; electromagnetic method; inversion method ... See more keywords
The Progress of the Helicopter-Borne Transient Electromagnetic Method and Technology in China
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DOI: 10.1109/access.2020.2972916
Abstract: The central and western regions of China have appropriate conditions for mining development, but there are many deserts, swamps and forest-covered areas in this vast land. As a result, the traditional on-ground methods are difficult… read more here.
Keywords: helicopter borne; development; electromagnetic method; technology ... See more keywords
Shielding Performance of Materials Under the Excitation of High-Intensity Transient Electromagnetic Pulse
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DOI: 10.1109/access.2021.3069328
Abstract: Shielding effectiveness (SE) dominates the shielding performance of materials. Under the excitation of high-intensity transient electromagnetic pulse, especially the wide-band transient electromagnetic pulse, how to characterize and calculate the SE of shielding materials is not… read more here.
Keywords: intensity; electromagnetic pulse; transient electromagnetic; shielding performance ... See more keywords
Denoising of Transient Electromagnetic Data Based on the Minimum Noise Fraction-Deep Neural Network
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Geoscience and Remote Sensing Letters"
DOI: 10.1109/lgrs.2022.3180433
Abstract: There are many conventional methods that have been applied in transient electromagnetic (TEM) random noise suppression such as stacking-averaging, but when the TEM system works in urban areas with strong noise, these methods are not… read more here.
Keywords: neural network; network; deep neural; noise fraction ... See more keywords