回线源瞬变电磁法一维正演并行算法

发布时间：2018-03-14 16:24

本文选题：余弦变换　切入点：并行　出处：《地质科技情报》2017年03期 　论文类型：期刊论文

【摘要】：利用余弦变换的高精度优势,采用并行计算来弥补余弦变换在计算速度方面的不足。深入分析原串行程序中的外层时间节点循环和内层余弦变换这种多层次循环结构的特点,给出了3种并行方案,在WINDOWS系统上使用FORTRAN和MPICH2相结合的开发工具实现了一维瞬变电磁并行正演程序。通过理论模型并行试算,与串行程序进行对比,验证了并行程序的可行性和正确性。3种并行方案均有效地提高了正演计算速度,在相同进程数目的情况下,外层循环时刻点之间的粗粒度并行效率最高,为高维的正反演并行提供了设计思路及研究基础。
[Abstract]:Taking advantage of the high precision of cosine transform, parallel computation is used to make up for the shortage of computation speed of cosine transform. The characteristics of outer time node cycle and inner layer cosine transform in the original serial program are deeply analyzed. In this paper, three parallel schemes are given. The one-dimensional transient electromagnetic parallel forward program is realized by using the development tools of FORTRAN and MPICH2 on the WINDOWS system. The parallel calculation of the theoretical model is carried out and compared with the serial program. The feasibility and correctness of the parallel programs are verified. 3 parallel schemes can effectively improve the forward computation speed. In the case of the same number of processes, the coarse-grained parallelism efficiency between points in the outer cycle is the highest. It provides the design idea and the research foundation for the high dimensional forward inversion parallelism.
【作者单位】：中国地质大学(武汉)地球物理与空间信息学院;长江大学电子信息学院;
【基金】：国家自然科学基金项目(41074086,51541408) 长江青年人才基金项目(2015cqn36)
【分类号】：P631.325

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