Show simple item record

dc.contributor.authorZhang, Jianzhongzh_CN
dc.contributor.authorHuang, Yueqinzh_CN
dc.contributor.authorSong, Lin-Pingzh_CN
dc.contributor.authorLiu, Qing-Huozh_CN
dc.contributor.author张建中zh_CN
dc.date.accessioned2013-12-12T02:49:39Z
dc.date.available2013-12-12T02:49:39Z
dc.date.issued2011-03zh_CN
dc.identifier.citationGEOPHYSICAL JOURNAL INTERNATIONAL, 2011,184(3):1327-1340zh_CN
dc.identifier.issn0956-540Xzh_CN
dc.identifier.otherWOS:000287362500024zh_CN
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/70892
dc.descriptionNational Natural Science Foundation of China [41074077, 40774065]zh_CN
dc.description.abstractP>We propose a new ray tracing technique in a 3-D heterogeneous isotropic media based on bilinear traveltime interpolation and the wave front group marching. In this technique, the media is discretized into a series of rectangular cells. There are two steps to be carried out: one is a forward step where wave front expansion is evolved from sources to whole computational domain and the subsequent one is a backward step where ray paths are calculated for any source-receiver configuration as desired. In the forward step, we derive a closed-form expression to calculate traveltime at an arbitrary point in a cell using a bilinear interpolation of the known traveltimes on the cell's surface. Then the group marching method (GMM), a fast wave front advancing method, is applied to expand the wave front from the source to all girds. In the backward step, ray paths starting from receivers are traced by finding the intersection points of potential ray propagation vectors with the surfaces of relevant cells. In this step, the same TI scheme is used to compute the candidate intersection points on all surfaces of each relevant cell. In this process, the point with the minimum traveltime is selected as a ray point from which the similar step is continued until sources. A number of numerical experiments demonstrate that our 3-D ray tracing technique is able to achieve very accurate computation of traveltimes and ray paths and meanwhile take much less computer time in comparison with the existing popular ones like the finite-difference-based GMM method, which is combined with the maximum gradient ray tracing, and the shortest path method.zh_CN
dc.language.isoen_USzh_CN
dc.source.urihttp://dx.doi.org/10.1111/j.1365-246X.2010.04909.xzh_CN
dc.subjectFINITE-DIFFERENCE CALCULATIONzh_CN
dc.subjectSHORTEST-PATHzh_CN
dc.subjectVELOCITYzh_CN
dc.subjectCOMPUTATIONzh_CN
dc.subjectTOMOGRAPHYzh_CN
dc.subjectEVOLUTIONzh_CN
dc.titleFast and accurate 3-D ray tracing using bilinear traveltime interpolation and the wave front group marchingzh_CN
dc.typeArticlezh_CN


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record