正则参数控制下的波阻抗约束反演
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摘要
通过势函数方式将波阻抗反演的病态问题转为良态问题 ,并且给出了边界保护势函数所具备的条件 .在反演过程中 ,通过改变正则参数数值以及合理地选择正则参数的初值 ,改善反演结果 ,提高反演收敛速度 .同时 ,在具体反演中使用快速模拟退火算法 ,可以克服目标函数局部极值的限制 ,从而获得全局最优解 .通过理论模型试算和实际资料处理 ,说明本文方法具有精度高、实用性强的特点 .
Using the potential function method,we turn the ill-posed inversion problem into good-posed one,and provide the conditions of the edge-preserving potential function. Through changing regularized parameter values and selecting a reasonable initial regularized parameter value in inversion procedure,the inversion result and convergent speed are improved. Meanwhile,we use a fast simulation annealing algorithm in the inversion,which can overcome the limitation of the local extremum of objective function,and acquire a global optimum result. Through calculating in theoretic model and applying to the field data,it is proved that this method has the advantage of high precision and practicability.
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