摘要
提出了一种新的射线追踪方法——模拟退火法。新方法不仅较好地解决了传统射线追踪方法过分依赖初始模型的问题,而且对于复杂速度场模型也能保证在固定的发射与接收点之间构建令人满意的射线路径及其相应的走时,搜索到满足旅行时全局最小的射线路径。此外,新方法还可计算局部最小旅行时,并可方便地通过指定射线经过固定点来对射线路径进行限制。理论模型的试算结果证明了该方法的可行性和稳健性。
This paper proposes a new ray-tracing method based on the concept of simulated annealing.With the new method,not only the problem that the traditional ray-tracing method is over dependent on pre-established initial ray-paths is well solved,but also the quality of desirable ray-paths construction and the associated traveltime calculation between fixed sources and receivers is ensured,even if the model is of much complicated velocity-field.As a result,the ray-paths whose traveltime approach is overall minimum are searched out successfully.Furthermore,the algorithm may calculate ray-paths with local extreme lower traveltime too and restrict them easily by instructing rays to pass through some fixed points.The feasibility and stability of the method have been proved by trial results of theoretical models.
出处
《物探与化探》
CAS
CSCD
北大核心
2011年第6期793-797,共5页
Geophysical and Geochemical Exploration
关键词
射线追踪
模拟退火
最小旅行时
全局优化
ray-tracing
simulated annealing
minimum traveltime
overall optimization
