A divergence-free vector finite-element method for efficient 3D magnetotelluric forward modeling
For large-scale magnetotelluric (MT) forward modeling using vector finite-element methods,
iterative solvers are commonly applied. However, as frequency decreases close to zero, the …
iterative solvers are commonly applied. However, as frequency decreases close to zero, the …
[HTML][HTML] 基于几何多重网格预条件技术的三维大地电磁高效正演模拟
王永斐， 柳建新， 郭荣文， 刘嵘， 李健， 陈杭， 杨刚强 - 地球物理学报, 2022 - geophy.cn
几何多重网格法(GMG) 将细网格上的大型稀疏矩阵的求解转化为较粗网格上的更容易求解的
问题, 从而快速求解大型稀疏方程组. 但是由于大地电磁法(MT) 正演模拟中涉及双旋度算子 …
问题, 从而快速求解大型稀疏方程组. 但是由于大地电磁法(MT) 正演模拟中涉及双旋度算子 …
An efficient cascadic multigrid solver for 3-D magnetotelluric forward modelling problems using potentials
The fast and accurate 3-D magnetotelluric (MT) forward modelling is core engine of the
interpretation and inversion of MT data. In this study, we develop an improved extrapolation …
interpretation and inversion of MT data. In this study, we develop an improved extrapolation …
[HTML][HTML] 大地电磁相位张量和倾子的三维主轴各向异性反演
孔文新， 余年， 李鑫， 张学健， 陈煌， 李天阳， 王恩慈 - 地球物理学报, 2023 - dsjyj.com.cn
地壳和上地幔普遍存在的电性各向异性是大地电磁测深方法在实践应用中的关键和难点问题,
而由近地表局部地电异常引起的电流型畸变可进一步加剧各向异性反演的多解性和不确定性 …
而由近地表局部地电异常引起的电流型畸变可进一步加剧各向异性反演的多解性和不确定性 …
Rapid surrogate modeling of electromagnetic data in frequency domain using neural operator
The efficiency of solving geophysical inverse problem largely relies on the efficiency of
solving the corresponding forward problem. As for electromagnetic (EM) data forward …
solving the corresponding forward problem. As for electromagnetic (EM) data forward …
[HTML][HTML] Efficient three-dimensional magnetotelluric forward modeling based on a geometric multigrid preconditioner
The geometric multigrid (GMG) method approximates the fine grid problems with the large
sparse matrix on a coarser grid, which is easier to be solved. However, due to the double …
sparse matrix on a coarser grid, which is easier to be solved. However, due to the double …
Three-dimensional unstructured finite element modeling of magnetotelluric problems allowing for continuous variation of conductivity in each block
At present, the 3-D magnetotelluric (MT) unstructured finite element modeling approaches
often adopt the block-wise uniform conductivity parameterization method, in which the Earth …
often adopt the block-wise uniform conductivity parameterization method, in which the Earth …
[HTML][HTML] Large-scale three-dimensional magnetotelluric forward modeling in anisotropic media using an extrapolation multigrid algorithm on non-uniform grids
In solving large-scale linear equations arising from three-dimensional (3-D) magnetotelluric
(MT) forward modeling, parallelization techniques and multigrid methods are two of the …
(MT) forward modeling, parallelization techniques and multigrid methods are two of the …
Efficient solution scheme for large-scale anisotropic forward modeling of 3-D magnetotelluric data
Efficient 3-D magnetotelluric anisotropy forward modeling is one of the key research
techniques used for inversion interpretation. We propose an improved multi-level down …
techniques used for inversion interpretation. We propose an improved multi-level down …
A robust and scalable multigrid solver for 3-D low-frequency electromagnetic diffusion problems
Y Wang, J Liu, R Guo, K Pan, G Yang… - … on Geoscience and …, 2024 - ieeexplore.ieee.org
Multigrid (MG) solvers, typically increasing the computational time linearly with the grid size,
are suitable for large-scale forward modeling problems. However, for electromagnetic (EM) …
are suitable for large-scale forward modeling problems. However, for electromagnetic (EM) …