Results 21 to 30 of about 292 (159)

Improved adaptive regularization for simulated annealing inversion of transient electromagnetic [PDF]

Scientific Reports
Geophysical inversion usually involves ill-posed problem. Regularization is the most commonly used method to mitigate this problem. There are many regularization parameter selection methods, among which the adaptive regularization method can ...
Xiang Tang, Shangbin Liu, Xiaofei Nian, Shengqiang Deng, Yuchao Liu, Qiongyao Ye, Yingjie Li, Yangyi Li, Tong Yuan, Huaifeng Sun   +9 more
doaj   +2 more sources

Groundwater resources detection based on transient electromagnetic system with small coils in Hongshaquan Mining Area

Meikuang Anquan, 2022
Groundwater environment is closely related to the protection and restoration of surface ecological environment, and the detection of groundwater resources is an important content to master the characteristics of groundwater environment.
LI Haichao, XU Biao, HU Xiongwu
doaj   +1 more source

Characterization of Surface–Borehole Transient Electromagnetic Response in Electrical Anisotropic Media

, 2023
When encountering sedimentary rocks with obvious laminations or fracture development zones, the conductivity of the conductive medium in different directions will change significantly, and the subsurface medium will exhibit macroscopic conductivity ...
Haojin Li, Liangjun Yan, Yurong Mao, Xinyu Wang, Lei Zhou   +4 more
core   +1 more source

EMD-Based Borehole TEM Array Signal Denoising and Baseline Wander Correction for NDT of Downhole Casings

IEEE Access, 2020
Transient electromagnetic (TEM) techniques have been proven to be efficient for nondestructive testing (NDT) operations due to their pulsed eddy-current properties.
Bo Dang, Changzan Liu, Ling Yang, Gang Wang, Mimi Wang, Zhiping Ren, Ruirong Dang   +6 more
doaj   +1 more source

Joint Inversion with Borehole and Semi-Airborne TEM Data Based on Equivalent Filament Approximation

, 2022
The borehole transient electromagnetic (TEM) method can be useful in deep mineral exploration to detect blind ore bodies beside or below the borehole, and is especially adapted to finding small-scale, deep, rich ore bodies.
Xiaohong Deng, Yi Yang, Qingquan Zhi, Xingchun Wang, Junjie Wu   +4 more
core   +1 more source

Research on the development height of water-conducting fracture zone in overburden rock based on transient electromagnetic method in hole

Meikuang Anquan
Transient electromagnetic method has shown great effectiveness in detecting water channels. However, conventional methods for detecting the development of water-conducting fracture zones are not suitable due to environmental influences.
Qinghua LIANG, Xiangjun DING, Guangliang LIU, Zhicheng LIU, Chunyuan WANG, Huan ZHANG   +5 more
doaj   +1 more source

Three-component detection technology of down-hole TEM for hidden geological anomalies in coal mines

Meitan kexue jishu
To meet the geological requirements for detailed exploration of concealed anomalies in coal mines and to accurately delineate and interpret hidden water hazards around boreholes, a three-component geological anomaly localization technique using borehole ...
Xiaowei GAO
doaj   +1 more source

Calculation of borehole transient electromagnetic apparent resistivity and dip in anisotropic medium

河南理工大学学报. 自然科学版
In the fields of resource exploration and development， as well as geological disaster prevention and control， the electromagnetic method of borehole is an effective tool for monitoring subsurface fluid distribution， particularly in evaluating the ...
ZHAO Ning, ZHANG Zhaoaoji, JIANG Liming, XIAO Zhanshan, HU Haitao   +4 more
doaj   +1 more source

Data for: New method for denoising borehole transient electromagnetic data with discrete wavelet transform

, 2019
Data_10512 is generated using Loki, which is a 3D forward modeling program (Raiche et al., 2007).Sferics is from a field survey.the three *.raw files are borehole TEM data recorded by ...
Dai, X
core   +2 more sources

“Cold Tropics”: Permafrost Existence and Thickness on Eastern Nevado Coropuna (Southern Peruvian Andes) Revealed by Ground‐Penetrating Radar and Geoelectrical Soundings

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT The existence of permafrost was explored at tropical latitude on Nevado Coropuna (southern Peruvian Andes) using a combination of ground‐penetrating radar (GPR) and vertical electrical sounding (VES) in order to strengthen the mutual validation of data processing and interpretation.
Velnia Chacca, Ramón Pellitero, Adriano Ribolini, José Úbeda, Luis Mariano del Río, Ricardo Vila, Oscar Vilca   +6 more
wiley   +1 more source