学科分类
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9 个结果
  • 简介:Landresourcesarefacingcrisesofbeingmisused,especiallyforanintersectionareabetweentownandcountry,andlandcontrolhastobeenforced.Thispaperpresentsadevelopmentofdataminingmethodforlandcontrol.Avector-matchmethodfortheprerequisiteofdataminingi.e.,datacleaningisproposed,whichdealswithbothcharacterandnumericdataviavectorizingcharacter-stringandmatchingnumber.Aminimaldecisionalgorithmofroughsetisusedtodiscovertheknowledgehiddeninthedatawarehouse.Inordertomonitorlandusedynamicallyandaccurately,itissuggestedtosetupareal-timelandcontrolsystembasedonGPS,digitalphotogrammetryandonlinedatamining.Finally,themeansisappliedintheintersectionareabetweentownandcountryofWuhancity,andasetofknowledgeaboutlandcontrolisdiscovered.

  • 标签: LAND CONTROL DATA MINING vector-match method
  • 简介:Ageo-referenceisaglobalorregionalgeographicalorgeodeticcoor-dinatesystemtowhichsensorsorspatialobjectdataarerelated.Hence,geo-ref-erencingisclosetothewellknownphotogrammetricconceptofexteriororabso-luteorientation,thecommonexecutionofwhichisindirect,viatheuseofgroundcontrolpoint.GPSandINStechnologieshavechangedthesituation,permittingdirectmeasurementofpositionandattitudeparametersandmakingexteriororien-tationfeasiblewithoutgroundcontrolatall,inprinciple.Theanalysisofaccuracyandreliabilityperformancediscloses,however,thatespeciallyINSdoesnotyetmeetthehighdemandsofphotogrammetry.Moreover,controlofsystematicer-rors,theproblemofdatumtransformation,andreliabilityconditionsmaketheuseofsomegroundcontrolpointsstillmandatory,atleastforanyhighperfor-mancegeo-referencing.

  • 标签: geo-referencing GROUND CONTROL
  • 简介:ThispaperdiscussestheapproachesforautomaticalsearchingofcontrolpointsintheNOAAAVHRRimageonthebasisofdatarearrangementintheformoflatitudeandlongitudegrid.Thevegetationindextransformationandmulti-levelmatchingstrategieshavebeenproveneffectiveandsuccessfulastheexperimentsshowwhilethecontrolpointdatabaseisestablished.

  • 标签: control point database automatical SEARCHING grid
  • 简介:Accesscontrolinmulti-domainenvironmentsisoneoftheimportantquestionsofbuildingcoalitionbetweendomains.OnthebasisofRBACaccesscontrolmodel,theconceptsofroledelegationandrolemappingareproposed,whichsupportthethird-partyauthorization.Then,adistributedRBACmodelispresented.Finallytheimplementationissuesarediscussed.

  • 标签: 运算控制 RBAC模型 图论 计算机安全 区域环境
  • 简介:调查控制网络优化设计与标准有关,例如精确,可靠性,敏感和费用,并且这些标准与对方仔细相关。为调查控制网络模拟优化设计的一个新方法被建议。这个方法基于观察价值的内部可靠性索引。为调查控制网络优化图案,分析方法和模拟方法有二个方法,并且两个都随广阔计算取决于计算程序。

  • 标签: 测量控制网 优化设计 可靠性准则法 冗余观测重量
  • 简介:Basedonthearchitecturalsurveyprojectof“theChiLinNunneryRedevelopment'inHongKong,thispaperattemptstoinvestigatethetechniquesofbuilding3Ddigitaldocumentoflarge_scaletimberstructureandqualitycontrolduringconstructionbycomputer_based3Dsimulationforthewholeproject.Therewereseveralkeyissuesincludingprimarydataacquisition,3Dmodelinganddisplay,pre_assemblingthetotalbuildingandqualityexamination,etc.Inthispaper,someusefulexperiments,suchasthenewapplicationsofCCDdigitalcameras,imageandgraphprocessingsoftwarepackages(CAD,Photoshop,Photomodeler,Vexcel,etc.)tothearchitecturesarealsopresented.Thesemethodsintroducedinthispaperaresuitableforimageandgraphintegrateddatabasebuildingofcomplicatedarchitectures,andusefulforconvenientlymaintainingandreconstructingtheancientarchitectures.

  • 标签: 部件数据库 质量控制 CAD
  • 简介:在调查和控制网络(CSN)之间的关系forearth轨道卫星和空间测地学,和在为深空格的CSN之间的关系天的天体和察觉者,和深空格察觉简短被总结,那么是调查的深空格和控制网络(DSN)的基本技术需要。然后,这些技术,成分并且散布中国卫星CSN(CSCSN)和在中国观察机构的另外的收音机被介绍。与主要CSCSN和另外的观察机构,最后,为中国的一些工程被分析重建更完美的CSCSN,并且建立DSN并且说。

  • 标签: 数据平滑网络 网络控制 卫星测量 微波雷达 空间检测
  • 简介:有EDM的GPS和高精确的距离测量的联合网络的一个新解决方案被建议。同时,它“s不妥当的仅仅使用的GPS网络与甩开大小。三个计划:陆上的网络,GPS网络和联合网络被讨论因为鉴于精确,Xiangjiaba的平面控制网设计建水坝,可靠性,详细协调并且支付。

  • 标签: 大地测量学 工程测量 GPS 全球定位系统 可靠性 水电站