摘要
上世纪中叶以来,微震探查法等基于面波相速度频散测定以及其反演的地下构造勘探方法,在地壳研究、工程地质勘探等方面得到了广泛的应用.本研究分析了遗传算法(GA)应用在面波频散反演当中出现的问题,采用遗传算法和Levenberg-Marquardt算法(LM法)的联合运用法——以遗传算法反演出来的大局的搜索结果为初始点,再进行LM法搜索,由此克服两者的缺点,实现高精度的反演.
The methods of prospecting the underground structure based on the measurement of phase velocity dispersion of surface wave and its inversion, such as the microtremor survey method, have been widely used in the study of earth＇s crust prospecting and engineering geological prospecting since the middle period of last century. This paper is aimed at improving the precision of inversion in these methods. Based on the analysis of problems emerging in the applying GA to the inversion of surface wave dispersion, we adopted the combination of genetic algorithm and LM algorithm to the inversion of dispersion curves. Using variable global results obtained by the inversion depended on GA as initial parameter, we again carry out additional local search based on the LM algorithm, and approach to the optimal solution. This technique could overcome their weak points and accomplish the inversion of high accuracy.
出处
《地球物理学进展》
CSCD
北大核心
2010年第1期303-309,共7页
Progress in Geophysics
基金
国家973计划课题(2009CB219301)
博士点基金(200801830042)
国家自然科学基金(40974054)联合资助
