MT Occam并行反演方案及性能分析  

Parallel MT Occam Inversion Scheme and Its Performance Analysis

作　　者：刘羽[1] 

机构地区：[1]桂林工学院电子与计算机系,桂林541004

出　　处：《武汉理工大学学报》2007年第12期136-140,共5页Journal of Wuhan University of Technology

基　　金：广西自然科学基金(桂科基0339070);广西教育厅科研项目(桂教科研2003-22)

摘　　要：针对MT Occam反演速度慢的问题,分析了实现其并行计算的可行性和途径,提出了基于频点和拉格朗日乘子(μ-1)扫描点划分的大粒度并行反演方案和具体实现步骤。对方案的加速性能进行了理论分析,得出了理论加速比曲线,明确了方案的适用性。采用基于消息传递的PVM并行平台,以主-从编程模式,实现了偏导数矩阵和μ值求取的并行计算。算例表明,综合并行效率较高,反演速度提高显著。This paper analyzed the feasibility and ways for parallel implementation of the MT（magneto telluric） Occam inversion in order to increase the inversion speed. A coarse-grained parallel inversion scheme based on frequency point and Lagrange multiplier （μ^1） scanning point division was proposed and a concrete parallel procedure was put forward. Theoretical performance of the scheme was analyzed and the speed-up curve obtained, and the applicability of the scheme was clarified. Parallel computations for the partial derivative matrix and the μ seeking were realized by using the master-slave programming model under the message-passing PVM parallel platform. The experiment result indicated that the all-around parallel efficiency was ideal and the inversion speed increased obviously.

关 键 词：MT OCCAM反演 并行计算 机群 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]