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任政勇

个人简介
任政勇

联系地址 中南大学地学楼12 邮政编码 410083

E-mail renzhengyong@gmail.com

研究方向:电磁法理论与应用研究

PhD thesis:《New developments in geo-electromagentic induction modeling》


Education:

PhD: 2008.9-2012.10 苏黎世瑞士联邦理工学院 指导老师:Hansruedi Maurer

Master 2004.9-2007.6中南大学信息物理工程学院 指导老师:汤井田

Bachlor: 2000.9-2004.6 中南大学信息物理工程学院


Publication:

1. Ren, Z.Y. and Tang, J.T, 2010. 3D direct current resistivity modeling with unstructuredmesh by adaptive finite-element method. Geophysics, 75, H7-H17.

2. Ren, Z.Y., Kalscheuer T. and Maurer, H.R., 2010, Accurate and robust evaluation of singular boundary element integrals for computing 3D radiomagnetotelluric fields. Exp. Abstracts EAGE Near Surface meeting Zurich, Switzerland.

3. Ren, Z.Y., Kalscheuer, T., and Maurer, H.R., 2010, Accurate computation of radiomagnetotelluric fields on 3D topography with surface integral equation methods. The 4th International Conference on Environmental and Engineering Geophysics, SiChuan, Chendu, China.

4. Ren, Z.Y., Kalscheuer, T., and Maurer, H., 2010. Accurate and robust evaluation of singular double surface integrals from Galerkin boundary element approximation of 3D RMT models using singularity extraction technique. 20th International Electromagnetic Induction Workshop, Expanded Abstract.

5. Ren, Z.Y., Kalscheuer, T., Greenhalgh, S., and Maurer, H., Boundary element solutions for broadband 3D geo-electromagnetic problems accelerated by an adaptive multi-level fast multipole method, Geophysical Journal International, published, 2013

6. Ren, Z.Y., Kalscheuer, T., Greenhalgh, S., and Maurer, H., A goal-oriented adaptive finite-element approach for plane wave 3D electromagnetic modeling, Geophysical Journal International, published, 2013.

7. Ren, Z.Y., Kalscheuer, T., Greenhalgh, S., and Maurer, H., Hybrid finite element-boundary element solutions of plane wave 3D electromagnetic induction problems, Journal of Computational Physics, in press.

8. Ren, Z.Y., Kalscheuer, T., Greenhalgh, S., and Maurer, H., A parallel finite-element approach for large-scale 3D electromagnetic induction modeling, Geophysics, in press.

9. Tang, J.T., Ren, Z. Y. (corresponding author), Hua, X.R., Theoretical analysis of Geo-electromagnetic modeling on Coulomb gauged potentials by adaptive finite element method, Chinese Journal of Geophysics, Vol 5(3), 2007, 1584-1594.

10. Ren, Z.Y. and Tang, J.T., Finite element modeling of 3-D DC resistivity using locally refined unstructured meshes, Chinese Journal of Geophysics,52(10), 2009, 2627-2634.

11. Tang, J.T., Hua, X.R., Cao, Z.M. and Ren, Z.Y., Hilbert-Huang transformation and noise suppression of magnetotelluric sounding data, Chinese Journal of Geophysics,51(2),2008, 1212-1218.

12. Liu, C.S., Ren, Z.Y. (corresponding author), Tang, J.T. and Yan, Y., Three-dimensional magnetotellurics modeling using edge based finite-element unstructured meshes, Applied Geophysics, 2008, 5(3):170-180.

13. Tang, J.T., Wang, F.Y, and Ren, Z.Y., 2010. 2.5-D DC resistivity modeling by adaptive finite-element method with unstructured triangulation. Chinese Journal of Geophysics, 3, 708-716.

14. Tang, J.T., Wang, F.Y, and Ren, Z.Y. (corresponding author), 3-D direct current resistivity forward modeling by adaptive multigrid finite element method, Journal of Central SouthUniversity of Technology, 2010, 17: 587-592.

15. Ren, Z.Y., Tang, J.T., Wang, F.Y., Xiao, X., Liu, C.S. and Guo, R.W., Object-oriented implementation of 3D DC adaptive finite-element method, Frontiers of Earth Science in China, 2009, 4(2): 229-236, DOI: 10.1007/s11707-009-0065-x


科研情况:

[1 苏黎世瑞士联邦理工学院博士生自由研究课题,宽频地电磁感应数值模拟研究

[2] 国家自然科学基金, h-型自适应有限元在三维地电磁场中的应用研究。

[3] 863重点项目子课题, 直接地形下CSAMT二三维正反演技术研究。

[4] 863重点项目子课题, 被动源电磁测深的多尺度自适应双模联合反演研究


科研方向
_________________________________________________________________________________________
研究方向:电磁法理论与应用研究

We present a novel accurate and efficient goal-oriented adaptive finite-element method solution

for complex multi-electrodes resistivity system with arbitrary smooth surface topographies.

A simple Green’s function of a half-space model is adopted to eliminate the singularity. A

unified boundary value problem for the regular potential is formulated for a multi-electrodes

system so that it shares a common system matrix. In addition, a goal-oriented error estimation

technique is developed to generate an optimal common grid so that highly accurate solutions are

obtained with minimum computation cost. Synthetic models are used to verify our algorithm

and excellent agreements are obtained by comparing with other methods.