| 重磁遗传算法三维反演中高速计算及有效存储方法技术 |
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| 引用本文： | 姚长利,郝天珧,管志宁,张聿文.重磁遗传算法三维反演中高速计算及有效存储方法技术[J].地球物理学报,2003,46(2):252-258. |
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| 作者姓名： | 姚长利 郝天珧 管志宁 张聿文 |
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| 作者单位： | 1.中国地质大学地球物理学院，北京 1000832 中国科学院地质与地球物理研究所，北京 100101 |
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| 基金项目： | 国家重点基础研究项目 (G2 0 0 0 0 4 670 1 )，国家自然科学基金项目 (4950 4 0 59,40 0 740 2 6) . |
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| 摘 要： | 将地下场源区域规则划分成很多小长方体单元，并且通过反演确定这些单元的物性变 化，勾画出场源的分布图像，这种方式逐步成为重磁反演，特别是三维反演的重要方向；遗 传算法等非线性技术进行该类反演将逐步成为发展趋势. 本文指出，在应用遗传算法进行该 类反演过程中，隐含着数据量较大时超常规的计算量，它已成为制约该类反演充分发挥作用 的瓶颈问题；同时，本文提出了针对性的分离并存储几何格架的计算策略、以及独特的几何 格架等效压缩存储技术，可以从根本上提高非线性反演计算速度，为该类反演的有效应用奠 定了坚实的基础.
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| 关 键 词： | 重磁三维反演 遗传算法 规则单元 几何格架 等效 存储 |
| 文章编号： | 0001-5733(2003)02-0252-07 |
| 收稿时间： | 2002-1-23 |
| 修稿时间： | 2002-11-6 |
High-Speed Computation and Efficient Storage in 3-DGravity and Magnetic Inversion Based on Genetic Algorithms |
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| YAO CHANGLI.High-Speed Computation and Efficient Storage in 3-DGravity and Magnetic Inversion Based on Genetic Algorithms[J].Chinese Journal of Geophysics,2003,46(2):252-258. |
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| Authors: | YAO CHANGLI |
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| Institution: | 1.Department of Approach Geophysics, University of Geosciences of China, Beijing 100083, China 2 Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 1 00101, China |
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| Abstract: | A currently prevailing in geophysical interpretation, especially in 3-D inversion case is regularly dividing the underground source region into a set of juxtaposed cuboids, estimating the physical properties by using potential field inversion and deducing the image of the geological source. Nonlinear global methods, such as Genetic Algorithm, gradually play a leading role in the inversion. It is shown in the paper that there exists such an excessive computation that has bottlenecked the efficaciousness of such method as the Genetic Algorithms. Several special tricks have been taken to break the choke point of overwhelming computation, one of which is to separate from formulas of the geometric trellis which is invariable during the whole process of inversion, and to store the trellis as a table which would make the following reiterative forward computation as just a simple reading of the table and multiplying it with corresponding properties of the geometric cells. Also, the caused huge storage of geometric trellis is reduced tremendously by a very skill of equivalent storing. The techniques revive the nonlinear methods in their applications to the inversion of gravity and magnetic anomalies for 3-D physical properties. |
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| Keywords: | D inversion of gravity and magnetic anomalies Genetic algorithms Regular juxtaposed cuboids Geometric trellis Equivalent storage |
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