航空瞬变电磁中MPI并行计算分析  

MPI parallel computing in airborne transient electromagnetic method

作　　者：陈辉[1] 杜兴忠[1] 杨正刚[1] 江晓涛[1] CHEN Hui DU Xingzhong YANG Zhenggang JIANG Xiaotao(Guiyang Hydropower investigation design and Research Institute, CHECC, Guiyang 550081, China)

机构地区：[1]中国电建集团贵阳勘测设计研究院有限公司,贵阳550081

出　　处：《物探化探计算技术》2017年第2期161-169,共9页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：贵州省科学技术基金([2013]2297)

摘　　要：由于航空瞬变电磁的数据量很大,外加瞬变电磁反演方法耗时较大地电磁更多,为了在后期资料处理时减少不必要的耗时,对正演计算中的频时转换的方法做了一定研究,采用基于拉普拉斯尺度变换性质的Gaver-Stehfest变换做频时转换,适当减少了编写程序代码的行数及程序计算的时间消耗。针对现在的计算机很多都是多核的特点,研究了航空瞬变电磁一维反演的MPI(Message Passing Interface)并行计算,大大地节约了运算时间,分析了并行计算时不同的多核CPU和不同的进程数时的加速比及并行效率。Becasue airborne transient electromagnetic data volume is huge and transient electromagnetic inversion method is more compared with the magnetotelluric time -consuming. It is necessary to apply parallel computing of the research on air-borne transient electromagnetic to reduce the unnecessary time in data processing. With the advantages of most computers with multi-cores, parallel computing research can be easily used in airborne transient electromagnetic. We first analyzed the fre-quency-time conversion method in the forward calculation,using Gaver - Stehfest transform based on Laplace scale transform nature do frequency -time conversion. This appropriates to reduce the number of rows to write program code and program cal-culation of time consumption. And then studied airborne transient electromagnetic one dimensional inversion of MPI （Message Passing Interface） with parallel omputing, which greatly saves the operation time. The parallel computing is then analyzed with multicore cpus,different processes considering the speedup ratio and parallel efficiency.

关 键 词：航空瞬变电磁 频时转换 G-S变换 并行 MPI 

分 类 号：P631.2[天文地球—地质矿产勘探]