Results 141 to 150 of about 291 (154)

Weak-Signal Reconstruction under Strong Noise in Borehole Transient Electromagnetics

The borehole transient electromagnetic (BTEM) method is a key technology for metallic mineral, groundwater, and related resource exploration, with measured responses exhibiting exponential decay over multiple orders of magnitude in dynamic range. However, late-time signals attenuate to extremely low amplitudes and become submerged in noise, creating a ...
Yi Ye, Chao Zhang, Nian Yu
openaire   +1 more source

Assessment of borehole geophysical logging and DC resistivity/transient electromagnetic methods for subsurface mapping in Wadi Feiran, Sinai, Egypt

Arabian Journal of Geosciences, 2021
Discrete direct current (DC) resistivity sounding still remains a convenient and popular tool for groundwater studies in wadi environments in Egypt, such as Wadi Feiran. It is considered one of the main sources for groundwater in Southern Sinai, Egypt.
openaire   +1 more source

Inversions of surface and borehole data from large-loop transient electromagnetic system over a 1-D earth

Geophysics, 2001
Abstract Large-loop electromagnetic (EM) systems that measure transient EM (TEM) data on the surface or in boreholes have shown increased application in exploration geophysics. Accurate interpretation of borehole TEM data is necessary to discover deep hidden targets that cannot be detected with surface systems.
Z. Zhang, J. Xiao
openaire   +1 more source

MULTI-LINE SOURCE GROUND-BOREHOLE TRANSIENT ELECTROMAGNETIC DETECTION METHOD AND MULTI-LINE SOURCE GROUND-BOREHOLE TRANSIENT ELECTROMAGNETIC DETECTION

2022
ZHOU NANNAN, XUE GUOQIANG, CHEN WEIYING, ZHANG SHUN   +3 more
openaire   +2 more sources

Effect of conductive host rock on borehole transient electromagnetic responses

International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1990
openaire   +1 more source

Transient electromagnetic wave transmission characteristics and experimental verification of borehole radar

High Power Laser and Particle Beams, 2014
常兴浩 Chang Xinghao, 赵青 Zhao Qing, 马春光 Ma Chunguang, 常文会 Chang Wenhui, 秦龙 Qin Long, 冉利民 Ran Limin   +5 more
openaire   +1 more source

Transient electromagnetic cross-borehole exploration for monitoring the state of the cryolithozone

Russian Journal of Geophysical Technologies
M. I. Epov, V. N. Glinskikh, I. V. Mikhaylov, M. N. Nikitenko, O. V. Nechaev, K. N. Danilovskiy   +5 more
openaire   +1 more source

Borehole transient electromagnetic response of a three-dimensional fracture zone in conductive half-space

International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1989
openaire   +1 more source

An overview of a highly versatile forward and stable inverse algorithm for airborne, ground-based and borehole electromagnetic and electric data

Exploration Geophysics, 2015
Anders Vest Christiansen, Cyril Schamper, Andrew Binley   +2 more
exaly  

Borehole Transient Electromagnetic Decoupling Technology Based on Center Empty Load Self-Compensating Coil

IEEE Transactions on Instrumentation and Measurement
Xinkai Qi, Tingye Qi, Guorui Feng, Hongtao Xu, Lubin Li, Yan Wang   +5 more
openaire   +1 more source