| 大地电磁三维正演并行算法研究 |
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| 引用本文： | 谭捍东,佟拓,林昌洪. 大地电磁三维正演并行算法研究[J]. 应用地球物理, 2006, 3(4): 197-202. DOI: 10.1007/s11770-006-4001-5 |
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| 作者姓名： | 谭捍东 佟拓 林昌洪 |
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| 作者单位： | 中国地质大学地质过程与矿产资源国家重点实验室，中国地质大学(北京)地球物理与信息技术学院，中国地质大学(北京)地球物理与信息技术学院 北京 100083 中国地质大学(北京)地球物理与信息技术学院，北京 100083，北京 100083，北京 100083 |
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| 基金项目： | This research is sponsored by the National Natural Science Foundation of China (No. 40374024). |
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| 摘 要： | 大地电磁法三维正演算法计算量大,用传统的串行程序计算相当耗时。而三维正演是逐个频率按顺序计算的,并行性好,适合并行运算。结合MPI自身的优越性,在深入分析大地电磁三维正演串行程序实现流程的基础上,确定了并行计算的思路,实现了三维正演的并行计算。通过三个理论模型对实现的三维正演并行程序进行了试算,分析对比了在多种情况下程序的执行效率。测试结果表明,所实现的三维正演并行程序运行结果正确,效率提高明显。此思路可为解决其它地球物理超大计算量问题所借鉴。
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| 关 键 词： | 大地电磁三维正演 MPI并行程序设计 三维交错采样有限差分法 并行算法 |
| 收稿时间： | 2006-09-14 |
| 修稿时间： | 2006-09-142006-10-08 |
The parallel 3D magnetotelluric forward modeling algorithm |
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| Tan Handong,Tong Tuo,Lin Changhong. The parallel 3D magnetotelluric forward modeling algorithm[J]. Applied Geophysics, 2006, 3(4): 197-202. DOI: 10.1007/s11770-006-4001-5 |
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| Authors: | Tan Handong Tong Tuo Lin Changhong |
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| Affiliation: | (1) State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing, 100083, China;(2) School of Geophysics and Information Technology, China University of Geosciences, Beijing, 100083, China |
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| Abstract: | The workload of the 3D magnetotelluric forward modeling algorithm is so large that the traditional serial algorithm costs an extremely large compute time. However, the 3D forward modeling algorithm can process the data in the frequency domain, which is very suitable for parallel computation. With the advantage of MPI and based on an analysis of the flow of the 3D magnetotelluric serial forward algorithm, we suggest the idea of parallel computation and apply it. Three theoretical models are tested and the execution efficiency is compared in different situations. The results indicate that the parallel 3D forward modeling computation is correct and the efficiency is greatly improved. This method is suitable for large size geophysical computations. |
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| Keywords: | Magnetotelluric 3D forward modeling MPI parallel programming design 3D staggered-grid finite difference method parallel algorithm. |
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