期刊文献+

基于二维三次卷积插值算法的波前构建射线追踪 被引量:20

Ray-Tracing of Wavefront Construction by Bicubic Convolution Interpolation
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摘要 针对波前构建法在实现波前射线路径追踪过程中所遇到的速度以及速度导数的插值问题,提出一种更精确的二维三次卷积插值算法,将该算法应用到波前构建法中,得到比较精确的射线路径。实例证明,所采用的插值算法在应用到波前构建的过程中,在求解非网格节点的速度及导数时与双三次多项式插值算法相比能够更加快速准确地获得射线路径。 To overcome the problems of the interpolation of the velocity and velocity derivative on non-grid during wavefront construction, a more accurate interpolation algorithm, called bicubic convolution interpolation, has been presented. Numerical results show that the interpolation method can get more accurate rays. And comparing with the double 3-order polynomial interpolation method, the velocity and velocity derivative on non-grid in wavefront construction can be computed more accurate and faster by the bicubic interpolation method.
出处 《吉林大学学报(地球科学版)》 CAS CSCD 北大核心 2008年第2期336-340,346,共6页 Journal of Jilin University:Earth Science Edition
基金 国家自然科学基金项目(40574052) 国家重点基础研究发展计划课题(2007CB209603) 教育部骨干教师资助计划项目
关键词 二维三次卷积 射线路径 波前 波前构建 bicubic convolution interpolation rays wavefront wavefront construction
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参考文献13

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二级参考文献11

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