【摘要】 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。更多还原

【Abstract】 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.更多还原