| 2. 5-D RESISTIVITY TOMOGRAPHY USINGBOUNDARY INTEGRAL EQUATIONS |
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| 作者姓名： | Mao Xianjin Bao Guangshu |
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| 作者单位： | College of Resource，Environment and Civil Engineering，Central South University of Technology，Changsha 410083，China |
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| 摘 要： | ResistivityTomography(RT)isakindofnewgeophysicsmethodandtechnique.UsingitonecangetmuchhigherresolutionofsubsurfacethanthatoftraditionalDCelectricalmethods.Sofar,themethodsofRTaremainlybasedonthefinite--elementmethodandalphacentersmethodll~3j.ItiswellknownthatRTisanon--linearinversionproblem.TheinversionmethodbasedonthefiniteelementmethodislineariziedonlyusingthelineartermofTaylorseries,soitisunavoidabletocalculateJacobimatrix.Thiscomputationnotonlycostsalotoftime,butalsotakesupmuchmemoryo…
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| 收稿时间： | 19 May 1997 |
2.5-D Resistivity Tomography using boundary integral equations |
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| Mao Xianjin, Bao Guangshu.2. 5-D RESISTIVITY TOMOGRAPHY USINGBOUNDARY INTEGRAL EQUATIONS[J].Journal of Central South University of Technology,1997,4(2):104-107. |
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| Authors: | Mao Xianjin and Bao Guangshu |
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| Affiliation: | (1) College of Resource, Environment and Civil Engineering, Central South University of Technology, 410083 Changsha, China |
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| Abstract: | DC Resistivity Tomography is a non-linear inversion problem. So far there are mainly two kinds of inversion methods, based on the finite-element method and alpha centers method. In this paper, the disadvantages of these two kinds of methods were analysed,and a new method of forward modeling and inversion (Tomography) based on boundary integral equations was proposed. This scheme successfuly overcomes the difficulties of the two formarly methods. It isn't necessary to use the linearization approximation and calculate the Jacobi matrix. Numerical modeling results given in this paper showed that the computation speed of our method is fast, and there is not any special requirement for initial model, and satisfying results of tomography can be obtained in the case of great contrast of conductivity. So it has wide applications. |
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| Keywords: | 2 5-D problem boundary integral equations resistivity tomography |
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