大庆石油地质与开发

2006, (06) 98-101+125

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全局搜索两点法射线追踪的方法
Global search two spots ray tracing method

孙祥娥,钟本善,詹毅
SUN Xiang-e,et al.(Information Engineering Institute of Chengdu University of Technology,Chengdu 610059

摘要(Abstract):

在假设地层界面是三次函数的基础上,根据两点射线追踪推导出二阶非线性方程组,将全局搜索策略和快速收敛的拟牛顿法结合起来,利用全局搜索策略首先得到近似的线性极小化,然后用DFP方法实现拟牛顿法,实现了非线性方程组的稳定求解,获得了复杂界面情况下的射线路径和合成地震记录。
Based on assumption that bed boundary is a cubic function,according to two spots ray tracing,second order nonlinear equations are derived.Through combining global search strategy with fast convergent quasi-Newton method,approximate linear minimization is firstly obtained by global search strategy,then quasi-Newton method is realized by DFP method,stable derivation of nonlinear equations is realized,and ray path and synthesized seismogram are achieved under complex interfacial conditions.

关键词(KeyWords): 两点射线追踪;Fermat原理;全局搜索;拟牛顿法;DFP方法
two spots ray tracing;Fermat theory;global search; quasi-Newton method;DFP method

Abstract:

Keywords:

基金项目(Foundation): 高等学校博士学科点专项科研基金资助课题(No:20040616003)

作者(Author): 孙祥娥,钟本善,詹毅
SUN Xiang-e,et al.(Information Engineering Institute of Chengdu University of Technology,Chengdu 610059

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