展会信息港展会大全

基于多参量的模拟退火全局优化傅里叶有限差分算子
来源:互联网   发布日期:2011-10-01 19:23:50   浏览:8739次  

导读: Abstract: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 optimizatio...

Abstract: 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.

赞助本站

相关内容
AiLab云推荐
推荐内容
展开

热门栏目HotCates

Copyright © 2010-2024 AiLab Team. 人工智能实验室 版权所有    关于我们 | 联系我们 | 广告服务 | 公司动态 | 免责声明 | 隐私条款 | 工作机会 | 展会港