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	Three-Dimensional Forward Modeling of Ground Wire Source Transient Electromagnetic Data Using the Meshless Generalized Finite Difference Method
	T. J. Li; M. Zhang and J. Lin
	2023
发表期刊	Ieee Transactions on Geoscience and Remote Sensing
ISSN	0196-2892
卷号	61期号:13
摘要	The transient electromagnetic (TEM) method is a geophysical exploration method commonly used in the detection of subsurface structures. Underground conductivity information at different depths can be obtained by interpreting the observed time-varying TEM data. Three-dimensional forward modeling is important for studying TEM responses and is also essential for inversion. The calculation accuracy of mesh-based forward modeling methods, such as the finite volume method (FVM) and finite-element method (FEM), is greatly affected by the quality of the mesh. In this article, a TEM forward modeling method based on a meshless generalized finite difference method (GFDM) is proposed. It is based on the Taylor expansion and weighted least squares fitting. In the GFDM, a partial derivative of the unknown parameter in the governing equation is expressed as a linear combination of the function values of support points. Numerical integration is not required during the forward modeling process, which simplifies the program implementation and increases the numerical calculation efficiency. In this article, a 3-D GFDM forward modeling method for simulating ground wire source TEM data is investigated; a corresponding program is developed, and the correctness of the code is verified through several 3-D models. By comparing the forward modeling results of this method with those of the FEM, it is verified that the GFDM offers higher computational speed and lower memory requirements.
DOI	10.1109/tgrs.2023.3292294
URL	查看原文
收录类别	sci
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/67641
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	T. J. Li,M. Zhang and J. Lin. Three-Dimensional Forward Modeling of Ground Wire Source Transient Electromagnetic Data Using the Meshless Generalized Finite Difference Method[J]. Ieee Transactions on Geoscience and Remote Sensing,2023,61(13).
APA	T. J. Li,&M. Zhang and J. Lin.(2023).Three-Dimensional Forward Modeling of Ground Wire Source Transient Electromagnetic Data Using the Meshless Generalized Finite Difference Method.Ieee Transactions on Geoscience and Remote Sensing,61(13).
MLA	T. J. Li,et al."Three-Dimensional Forward Modeling of Ground Wire Source Transient Electromagnetic Data Using the Meshless Generalized Finite Difference Method".Ieee Transactions on Geoscience and Remote Sensing 61.13(2023).

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