Results 11 to 20 of about 291 (154)
Gauss-Newton inversion of ground transient electromagnetic data using COMSOL multiphysics [PDF]
Scientific ReportsThis study presents a Gauss-Newton inversion framework for Transient Electromagnetic (TEM) data based on the finite element software COMSOL Multiphysics.
Fan Li, Peng Wang, Kai Lu
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Key Technologies for Surface-Borehole Transient Electromagnetic Systems and Applications
Minerals (Basel, Switzerland)The nonferrous metal mines in China are rapidly depleting due to years of mining, and it has become difficult to identify new mineral resources in the periphery of the old mining area. In order to deal with this situation, advanced technologies and equipment must be deployed.
Yurong Mao +2 more
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Meitan xuebaoBorehole transient electromagnetic(BTEM)scanning detection method uses the advanced exploration boreholes in the roadway to scan and detect the hidden geological anomalies outside the borehole wall by rotating the transceiver coil inside the borehole ...
Chengtao XIN +3 more
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Meitan xuebaoThe borehole transient electromagnetic method is used to detect the long-range water-bearing bodies around the borehole wall by using the advanced water exploration borehole in the heading roadway, which avoids the “one’s opinion in one hole” because the
Jiulong CHENG +3 more
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Paleo-climatic control on recharge and fresh-salt groundwater distribution in the Red River delta plain, Vietnam [PDF]
Scientific ReportsPaleo-climatic induced sedimentation controls present-day recharge and the fresh-salt groundwater distribution in Quaternary delta systems. During sea-level highstands, marine clays with saline pore water were deposited and are interbedded with aquifers ...
Flemming Larsen +3 more
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Improved adaptive regularization for simulated annealing inversion of transient electromagnetic [PDF]
Scientific ReportsGeophysical 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 +9 more
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Minerals (Basel, Switzerland)The surface–borehole transient electromagnetic method (TEM) employs surface-based transmission and downhole reception to collect electromagnetic data. This configuration offers distinct advantages over traditional TEM approaches by effectively attenuating surface electromagnetic noise and cultural interference, leading to enhanced signal strength and ...
Xingbing Xie +2 more
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Minerals (Basel, Switzerland)The surface-borehole transient electromagnetic method exhibits significant advantages in identifying deep targets, as its closer distance to subsurface targets results in more pronounced effective anomalies when compared to surface-based techniques.
Xian-Xiang Wang
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Minerals, 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 anisotropy.
Haojin Li +4 more
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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
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