简介：ＰＡＲＡＭＥＴＲＩＣＳＵＲＦＡＣＥ／ＳＵＲＦＡＣＥＩＮＴＥＲＳＥＣＴＩＯＮＺｅｎｇＸｉａｎｇｌｉｎ；ＷａｎｇＱｉｆｕ；ＺｈｏｕＪｉ；ＹｕＪｕｎＰＡＲＡＭＥＴＲＩＣＳＵＲＦＡＣＥ／ＳＵＲＦＡＣＥＩＮＴＥＲＳＥＣＴＩＯＮ￥ＺｅｎｇＸｉａｎｇｌｉｎ；Ｗａｎ...

简介：Inthispaper,theproblemoffindingtheintersectionofatriangularBezierpatchandaplaneisstudied.Forthedegreethatonefrequentlyencountersinpractice,i.e.n=2,3,anefficientandreliablealgorithmisobtained,andcomputationalstepsarepresented.

简介：在这篇论文，我们学习随它的合理翻译设置的Mcmullen的交叉。主要困难是交叉的产生结构。由翻译向量的根值扩大，我们给它的分数维的描述。我们发现这些的Hausdorff措施给形式价值其非零仅仅来自翻译向量的一个分离系列(x，y)与它的根值扩大。

简介：ＡＮＩＮＴＥＲＳＥＣＴＩＯＮＰＲＯＰＥＲＴＹＯＦＴＨＥＳＩＭＰＬＥＲＡＮＤＯＭＷＡＬＫＳＩＮＺ￣ｄＺＨＯＵＸＩＡＮＹＩＮ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓ，ＢｅｉｊｉｎｇＮｏｒｍａｌＵｎｉｖｅｒｓｉｔｙ１００８７５，Ｃｈｉｎａ）Ａｂｓｔ...

简介：交叉方法是为定位地震的基本途径之一并且不仅柔韧而且有效。然而，因为为常规交叉方法使用的速度模型基于同类或旁边地同类的媒介，它的地点精确性不高，特别为焦点的深度，它太简单。以便改进精确性，我们修改了存在交叉方法。在修改途径，地震loci没被假定圆形或夸张，计算精确性为跟踪光线用一个最小的旅行时间树算法被改进。数字模型证明修改方法能在复杂速度模型定位地震。

简介：［1］AbdelmotyAI,WilliamsMH.Advancedgeographicdatamodeling.Spatialdatamodelingandquerylanguagefor2Dand3Dapplications.Delft:TheNetherlands,1994［2］FranzA.Voronoidiagrams——asurveyofafundamentalgeometricdatastructure.ACMComputingSurveying,1991,23(3)［3］ZhengC,ChenJ.Organizingandretrievingcadasatraldatabasedonspatio-temporaltopologybetweenfather-sonparcels.JournalofWuhanTechnicalUniversityofSurveyingandMapping,1997,22(3):216～221(inChinese)［4］ChenJ,GoldCM,CuiBL,YongHU,etal.Extendingordinaryplanar-graph-basedspatialdatamodelwithVoronoiapproach.In:ProceedingsofIEAS&IWGIS'97.Beijing,1997.18～20［5］ChenJ,CuiBL.AddingtopologicalfunctionstoMapInfowithVoronoiapproach.JournalofWuhanTechnicalUniversityofSurveyingandMapping,1997,22(3):195～200(inChinese)［6］Clementini,Elisel,PaolinoDiFelice,PetervanOosterom.Asmallsetofformaltopologicalrelationshipssuitableforend-userinteraction.AdvancesinSpatialDatabases,LectureNotesinComputerScience.Springer-Verlag,1993.277～295［7］EdwardsG,LigozatG,FrylA,etal.AVoronoi-basedPIVOTrepresentationofspatialconceptsanditsapplicationtoroutedescriptionsexpressedinnaturallanguage.SpatialDataHandling'96,1996,7B.1～15［8］EgenhoferMJ.Reasoningaboutbinarytopologicalrelations.In:Proceedingsofthe2ndSymposiumonLargeSpatialDatabases.LectureNotesinComputerScience,Springer-Verlag,1991.143～160［9］EgenhoferMJ,FranzosaRD.Point-settopologicalspatialrelations.INT.J.GeographicalInformationSystems,1991,5(2):161～176［10］EgenhoferMJ,HerringJ.Categorizingbinarytopologicalrelationshipsbetweenregions,lines,andpointsingeographicdatabases.TechnicalReport,DepartmentofSurveyingEngineering,UniversityofMaine,Orono,1991［11］EgenhoferMJ,Al-tahaKK.Reasoningaboutgradualchangesoftopologicalrelations,inTheoriesandMet

简介：对线线的描述拓扑的关系尽管许多努力被做了，仍然是一个未解决的问题。这个问题涉及象空间质问，空间分析和制图综合那样的许多实际应用。开发一条健全、有效的途径描述线线关系，它是第一必要排队定义一个个人的拓扑学，即，本地拓扑学。连接的度的概念在一根线的几何结构被用于拓扑的差别的鉴定。一根线的一般拓扑的定义被给，即，端点集合和内部点设定。这个定义能被用于不同尺寸的嵌入的空格，合作尺寸是否等于或比零大。在这个基础上，打电话给4intersection-and-difference的一个通用模型为对基本线线的描述被建立拓扑的关系，一张概念的邻居图与拓扑的距离的考虑在之上被造。建议模型能在/R~1和/R~2代表在线片断之间的拓扑的变化，和基本关系的性质，这被结束。

简介：有限的组G的亚群H被称为TI亚群如果H∩H~x=1或Hfor所有x∈G。在这篇论文，为有限p组，所有abeliansubgroups在是TI亚群的一个完全的分类，被给。

简介：WepresentaparalleliterativealgorithmtofindtheshortestdistanceprojectionofagivenpointontotheintersectionofafinitenumberofclosedconvexsetsinarealHilbertspace;thenumberofsetsusedateachiterationsteptcorrespondingtothenumberofavailableprocessors,maybesmallerthanthetotalnumberofsets.TherelaxationcoefficientateachiterationstepisdeterminedbyageometricalconditioninanassociatedHilbertspace,whilefortheweightsmildconditionsaregiventoassurenormconvergenceoftheresultingsequence.Thesemildconditionsleaveenoughflexibilitytodeterminetheweightsmorespecificallyinordertoimprovethespeedofconvergence.

简介：Detectinganddescribingmovementofvehiclesinestablishedtransportationinfrastructuresisanimportanttask.Ithelpstopredictperiodicaltrafficpatternsforoptimizingtrafficregulationsandextendingthefunctionsofestablishedtransportationinfrastructures.Thedetectionoftrafficpatternsconsistsnotonlyofanalysesofarrangementpatternsofmultiplevehicletrajectories,butalsooftheinspectionoftheembeddedgeographicalcontext.Inthispaper,weintroduceamethodforintersectingvehicletrajectoriesandextractingtheirintersectionpointsforselectedrushhoursinurbanenvironments.Thosevehicletrajectoryintersectionpoints(TIP)arefrequentlyvisitedlocationswithinurbanroadnetworksandaresubsequentlyformedintodensity-connectedclusters,whicharethenrepresentedaspolygons.Forrepresentingtemporalvariationsofthecreatedpolygons,weenrichthesewithvehicletrajectoriesofothertimesofthedayandadditionalroadnetworkinformation.Inacasestudy,wetestourapproachonmassivetaxiFloatingCarData(FCD)fromShanghaiandroadnetworkdatafromtheOpenStreetMap(OSM)project.ThefirsttestresultsshowstrongcorrelationswithperiodicaltrafficeventsinShanghai.Basedontheseresults,wereasonouttheusefulnessofpolygonsrepresentingfrequentlyvisitedlocationsforanalysesinurbanplanningandtrafficengineering.

简介：AstatisticalanalysisonearthquakeactivityintheKashi-WuqiaintersectionareatriggeredbyearthtideisdonebySchusterstestandthePermutationtestondailyandmonthlyscales.Thenorth-south,east-westcomponentofthetidalforceandtidalbodystressarechosenasthetidalcurveinthedailyscale.Theresultsshowthatmostoftheearthquakesoccurrednearthemaximum0°ofthethreekindsoftidalcurves,thepredominanttidalphasesoftheearthquakeare-5.86°,6.60°and-15.52°,andthefrequencyoftheearthquakesincreaseswiththeincreaseofthetide;withthreekindsoftidalcurves(thenorth-south,east-westcomponentofthetidalforceandtidalbodystress),thepSofSchusterstestforalltheearthquakesis10.52%,2.40%and2.06%,andthepPofthePermutationtestis10.90%,2.40%and2.06%,andtheresultsofpSandpPbasedontheeast-westcomponentofthetidalforceandtidalbodystressarebelowthethresholdof0.05thattidaltriggeringofearthquakes.Inthemonthlyscale,boththepSandpPareverylow(closeto0),farbelowthethresholdof0.05oftidaltriggeringofearthquakes,andthepredominanttidalphaseforearthquaketriggeringis-18.95°,closetothemaximum0°(newmoonandfullmoon)oftheearthtideinmonthlyscale.Regardingthestatisticaltestresultoftidaltriggeringofearthquakes,apreliminaryexplanationisgivenastowhythetriggereffectintheeast-westdirectionisgreaterthanthatinnorth-southdirection.

简介：

简介：FIA广泛地被使用超过一十年了解开变丑和变形难题。因为在岩石中的组合layering总是重新激活多重变丑在哪儿发生了，Orogenic处理在历史或orogenesis挑战科学家期间早发展，几乎不离开在矩阵保存的生叶开发的历史的小证据。在科罗拉多的落基山脉的山麓丘陵，美国如果porphyroblasts没在影响了这些岩石的多重变丑事件期间成长或如果他们旋转了，当这些事件发生了，包含一直不是可区分的四个FIA集合(趋势)的继任。当变丑继续了，他们表明两变丑和isograds的地点划分显著地变化了。

简介：ConstraintsfromP-Tpseudosections(MnNCKFMASHsystem),foliationintersection/inflectionaxespreservedinporphyroblasts(FIAs),mineralassemblagesandtexturalrelationshipsforrockscontainingallthreeAl2SiO5polymorphsindicateakyanite→andalusite→sillimanitesequentialformationatdifferenttimesratherthanstablecoexistenceattheAl2SiO5triplepoint.AllthreeAl2SiO5polymorphsgrewintheChl,Bt,Ms,Grt,St,PlandCrdbearingOrdovicianClayholeSchistinBalcooma,northeasternAustraliaseparatelyalongaloopedP-T-t-Dpaththatswapsfromclockwisetoanticlockwiseinthetectono-metamorphichistoryoftheregion.KyanitegrewduringcrustalthickeninginanEarlySilurianOrogeniceventfollowedbydecompression/heating,andalusiteandfibroliticsillimanitegrowthduringEarlyDevonianexhumation.