基于图形结构的三维射线追踪方法

43200047CI」】NESEJOURNALOFGEOP】IYSICSVol.43,No.4July,2000[100015733(2000)04053408l16P31.4(,,100083)(,,100101)ll,,.Bresehnam;,,;,,.,,,.l】,,,,,.1,,1[]..,;.,,,(,).,,,,.,.,aNkanis2[],Mose、Cao4[]imes5[].,,,6[,’].,,、【】1999415,2000217.【】(49974005),(KZ951Bl04).【】,,1972,1993,1999,,.4:553.,,;,,O(MogN),,,.,,.,.2,,t,,△t,t+△t..,,,,.,,,,,,,.,,,,10[,:t(i)=n[j)+△,11,jEN,(l)t(s)=0,(2)t(s),(ti),i,j,△,N·,、、3.-,,.-`-,」,rt!!|!!|+{l}--!}}}`.!.1,ùù,``!`|tl,2.1,mxn.,.l,,,(l(a)),,,`_LL_~J_____(b).a)(j.---|,r,`L+ó1(a)1;(b)2.9.1hTenodeeonifguaritonofveloeiytmodel.2,(1(b)),53643,.2,,,,..22().,.,,,4、,,8,2(a).16、,,16,2(b).,,,26,2(c).,,,,.\\\\\////////\\\{{{{{\\\///iii,,、\,,》//////、、】】】\\\......IIIIIIIIIII(b)2、、、{{{、{{{L``“、}}}l、、、、JJJJJJJ、、、、,.,,```、___、.、、、、、、、、_______(a)2x2;(b)4x4;(c)2x22.Rg.2Caleuliatoncellidagranl,,,,(l)△、·△t=Moser2[]△t,j,D,、/(U+)/2,(3),i,j,jij,UUij·△jtt·,,1;{}____L_-,}〕L_』__JI}11__[____」___」_|ì3BersehnamRg.3Bershehnamnodeidagralll·,△Bersenham8[].Bersehnam,,.,3,i、j,bl、bZ、…、bsBersenham.Bersenham,△`,△,,/(/2+K;+2+.++U2/)/k(+l),(4)35843,,;5(b)N8000,3.100x50,.N,A,B,ABA\B,A\B,N.,,A\B,,,.,,.,1,1,.,,,,.,:1.N,,3,,,、、,,SneU,,,,,,.,.,,,.,N,Q,,F,m,(1)(ti)t,(i)(tzl’),(l)=N,t,i()=coi(`N),:,tl(s)=0(s).(2)Qt,(i)(i`Q).(3)t,(j)=min[t,(j),tl(i)+△tl,](`FnQ),iQ.(4)=N,(5),,(2).(5)43100m,△x△z=Zm.6(b),.,,.,【3,4],.5,Bersenham,.,(go(N),..,,,,,.,.1J.,..J1r..Lr..L13]【4]1..J1.Jó、`U[7]{8]ChallgXu.eRliatonshipbetweendistnbuitonandreeons。JctedvelocltylmageinreflecitontomograP.oJurnalofJlicdGeopsies,1996,35(5):145150-Nakainshil,YamcuhiKAnumeirealexpenmentonnonllnearimagereeonstrueitonofrmifrsirrvalitmesofrtwo--idmensionalisladnstrllctureJjVus.aErhl,1986,34(2):195201.TJMoser.ShortestPahtealculaitonofseismicrays.Gesies,1991,56(l):5967.ShunlluaaCo,StewartGl℃ell】lalgh.CaleulaitonofhteseismieifrsbreakitmefleldanditsaryPahtdistirbuitonusingaiminmtvarelitmetreealgoirhtm,GeOP5.nIt,1993,114(3):593600.LudekimesandMiehalvKasineka.3Dnetworkrtracing.Gest,1994,l6(3):726738.,,.,,1995,38(6):823832.LIUHong,MENGFANesn,LlYouiMng.Theinterlbeegirdmehtodforseeikngglobaliminmumtvraeltimeandhteeorrespondent.hCineseGes(inChinese),1995,38(6):823832-,,.,,1992,35(2):223233.HUANGLianiJe,LlYouiMng,WUuRShan.hTewvaefrontarytacringmethodofrimagereeonstnlciton.hCineseJGe5.(inCihnese),1992,35(2):223233.,..:,1994:169170.SHUNJiaGuagn,YANGChangCuiComPuterGraPhies.Beijing:TsinghuaUniversityPress.1994.169170.WilliamoFrd,WilliamToPP.n1StnlcturesiWhtC++.nEglewoodCliffs,NJ:Pl℃niteeHall,Ine,,1996.779797.BellmanROnarouitngPorblem,Quart1.Zht.,1958,16(l):8890.9l0[][]4:541【11」[12」[13]ksatrEW.AonetontwoPorblemsieoecnnnitonwithgarPhs,Number.Maht,1959,l(2):269271.JohnsonDB.Eiffeientalgoirt】InlsofrshortestPathsinsParsenetworksj()urnulhteAC1977,24(l):l13.G11oG,llot6no5.ShortestaPthmethods:AuinfyingApproach.MathemacalPorgranlmingStduy.1986,26(l):3864.3DRAYTRACINGMETHODBASEDONGRAPHICSTRUCTUREWANGHUI(BeijjngnUiversiofieneeandeTehnolo,eBijing100083,〔ina)CHANGXU(nIstituteofGeologyandGesieshCinesecAademyoj、enees,Being100101,hCina)【AbstraetlTlleshortestrayPhatmehtodbasedongraphiestructureovercomeshtedrawbacksandlimiitatonsoftradiitonalraytracingmehtods,buthtecomPutationitmeandaceuacryofhteersulstneedtobeimPorved.hTisPaperinotrdLIcesBersenhamlinealgoirtllminothetvatrelitmeealeuliatonofnodesotimprovehteaccuacryoftravelitmeandrayPahtersulst.TosPeeduPcomuPatiton,weuseQulekSortalgoirt】lmandInseirtonSortalgoirthlllinsetadofusuallyusedeHapSortalgoirt】1111.WelakeadvanagteofhtenodeconifguaritonPersenetdin5Paperotinotrdueehtevelociytinetrface,alldaceodringlygethtealgoirtllnloferflecitonvar`tracing.Nullleirealetsstshowhtatit15anaceuaretandeiffeientarytacringmehtod.IKeywordslaRyNOdeacing,ShoertstaryPath,iLnealgoirthnl,Sortalgoirthln,eonflguariton,Velociytinetrafce.