改进模拟退火算法在研究地壳上地幔层面位置中的应用  

Application of improved simulated annealing algorithm in the study of depth of interfaces in the crust and upper mantle

作　　者：张雪梅[1] 孙若昧[1] 杨辉[1] 滕吉文[1] 

机构地区：[1]中国科学院地质与地球物理研究所,北京100029

出　　处：《地球物理学进展》2008年第4期1023-1029,共7页Progress in Geophysics

基　　金：国家自然科学基金(40434009);“地下信息探测技术与仪器”重点实验室基金(GDL0607)联合资助

摘　　要：本文基于Metropolis接收原则改进快速模拟退火算法同时进行地下介质层速度和层厚度的联合反演.通过数值模拟验证,该方法在调整好起始温度、温度下降方案等参数的情况下,通过非线性反演可以得到接近理论模型的结果.通过对沿86°E经线南北跨越印度板块、青藏高原和塔里木盆地的垂直剖面的纯频散进行反演,得到S波速度结构,由此识别其Moho面深度和岩石圈底界面等层面位置.Base on the Metropolis rule, we improved the simulated annealing algorithm to simultaneously inverse the velocities and thicknesses using the dispersion data. The application to the numerical examples shows the non-linear results are close to the original models, when the condition of selecting method for temperature parameters and initial temperature are satisfied. Using the pure dispersions of Rayleigh wave, the non-linear inversion has been carried out for S wave velocities and thicknesses of the vertical profile along 86°E, crossing India, Qinghai-Tibet Plateau, Tarim Basin. The layers by the non-linear inversion can be recognized easily from the velocity values and their offsets.

关 键 词：模拟退火算法 联合反演 层面位置 

分 类 号：P315[天文地球—地震学]