%0 Journal Article
%T Globally optimized Fourier finite-difference operator using simulated annealing algorithm based on multi-parameter<br>基于多参量的模拟退火全局优化傅里叶有限差分算子
%A ZHU Sui-Wei
%A ZHANG Jin-Hai
%A YAO Zhen-Xing
%A <br>朱遂伟
%J 地球物理学报
%D 2008
%I 
%X Fourier finite-difference(FFD) method can handle wave propagations in the complex media with large lateral velocity contrasts and wide propagation angles.However,the FFD method has obvious error for wider angles.The optimization method can obviously improve the image accuracy of wider angles without additional computational cost.Based on the rational approximation of the FFD operator,we extend the two coefficients to be optimized to four coefficients,then we optimize them globally using simulated annealing algorithm.Besides the velocity contrast,we consider the effects of both frequency and depth interval.The theoretical analyses and the impulse responses demonstrate that our method significantly extends the accurate propagation angle of the FFD method.Migration results on the 2D SEG/EAGE salt model show that our method resolves the wider angles and the sub-salt weak reflectors more accurately than the unoptimized FFD method.Combination of the FFD method and alternative-direction-implicit plus interpolation method on 3D impulse responses further proved the validity of our method.
%K Fourier finite-difference
%K Multi-parameter
%K Simulated annealing
%K Global optimization
%K Alternative-direction-implicit plus interpolation<br>傅里叶有限差分
%K 多参量
%K 模拟退火
%K 全局优化
%K 交替方向加插值
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=1E44AE713D8A6DE0&jid=14DC41C59CBF6770055A7D610D53AE46&aid=FB95EA1C39EFABC2CF6BE177FF85F9BE&yid=67289AFF6305E306&vid=987EDA49D8A7A635&iid=B31275AF3241DB2D&sid=E03C52F3E125D1C7&eid=EFD9B70C3A0525B7&journal_id=0001-5733&journal_name=地球物理学报&referenced_num=2&reference_num=22