Spatially Adaptive Regularization in Total Field Inversion for Quantitative Susceptibility Mapping
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DOI: 10.1016/j.isci.2020.101553
Abstract: Summary Adaptive Total Field Inversion is described for quantitative susceptibility mapping (QSM) reconstruction from total field data through a spatially adaptive suppression of shadow artifacts through spatially adaptive regularization. The regularization for shadow suppression consists… read more here.
Keywords: spatially adaptive; susceptibility; field inversion; field ... See more keywords
Memory-Efficient 3-D LWD Solver With the Flipped Total Field/Scattered Field-Based DGFD Method
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DOI: 10.1109/lgrs.2019.2950659
Abstract: This letter presents a fast and memory-efficient 3-D electromagnetic solver for logging-while-drilling (LWD) tools based on the flipped total field/scattered field-based discontinuous Galerkin frequency-domain (TF/SF DGFD) method. The new method inherits the Riemann transmission condition… read more here.
Keywords: field; solver; total field; dgfd method ... See more keywords
Mixed Total Field/Scattered Field-Based Discontinuous Galerkin Frequency-Domain Method for Subsurface Sensing
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DOI: 10.1109/tgrs.2018.2883493
Abstract: To model the responses of electromagnetic surveys for geophysical subsurface sensing, a mixed total field/scattered field-based discontinuous Galerkin frequency-domain (TF/SF DGFD) method is proposed in this paper. The proposed TF/SF DGFD method is implemented at… read more here.
Keywords: field; field scattered; subsurface sensing; method ... See more keywords
3D vector finite-element electromagnetic forward modeling for large loop sources using a total-field algorithm and unstructured tetrahedral grids
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DOI: 10.1190/geo2016-0004.1
Abstract: ABSTRACTUnstructured tetrahedral grids with local refinement facilitate the use of total-field solution approaches to geophysical electromagnetic (EM) forward problems. These approaches, when combined with the vector finite-element (FE) method and with refinement near transmitters and… read more here.
Keywords: finite element; tetrahedral grids; total field; electromagnetic forward ... See more keywords
Fast 3D magnetic inversion of a surface relief in the space domain
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DOI: 10.1190/geo2018-0712.1
Abstract: We have developed a fast 3D regularized magnetic inversion algorithm for depth-to-basement estimation based on an efficient way to compute the total-field anomaly produced by an arbitrary interface separating nonmagnetic sediments from a magnetic basement.… read more here.
Keywords: inversion; field anomaly; basement; relief ... See more keywords