摘要
本文的工作聚焦于构造一种新的地震波散射非线性反演方法.文中将不动点理论引入到地震波散射非线性反演中,并具体的构造出了波的相空间里的一系列关于速度参数具体的压缩映射算子,从而从理论上保证了速度参数不动点的存在性和寻找途径.在此基础上文中还证明了利用此速度参数的不动点和正演所得到的相应的波的值也是波函数本身的不动点,并利用不动点的稳定属性得出此不动点是一个全局最优的点.
The paper gathers all ours attention to make a new method of nonlinear seismic scattering inversion. The paper provides a theory and method of how to introduce the fixed-point theory into the nonlinear seismic scattering inversion and how to obtain the solution, and gives the actually method to create a serials of contractive mappings of velocity parameter's in the mapping space of wave. Therefore, the results testify the existence of fixed point of velocity parameter and give the method the find it. Furthermore, the paper proves the conclusion that the value obtained by taking the fixed point of velocity parameter into wave equation is the fixed point of the wave of the contractive mapping. Thence, the fixed point is the global minima since the stabilities quality of the fixed point.
出处
《地球物理学进展》
CSCD
北大核心
2005年第2期496-502,共7页
Progress in Geophysics
基金
受国家杰出青年科学基金(批准号:40025412)
中国科学院百人计划(基金批准号:19910120)
和中国科学院知识创新工程重大项目(基金批准号:KZCX-07)资助的课题.
关键词
地震波
非线性反演新方法
非弱散射问题
层析成像
不动点
seismic waves, new method of nonlinear inversion, question of non-weak scattering, tomography, fixed point
