GIS环境下交通信息处理问题研究3

29220054()JournalofWuhanUniversityofTechnology(TransportationScience&Engineering)Vol.29No.2Apr.2005GIS3:20050114,,29,,3S3863(:2001AA135140)1,2)2)2)(1)210008)(2)100101):,3,,3,,.,GPS,3S.,,.:;;GPS:TP31513,1.,.4:1,2,3,4.,.,.,.,.,GPS.,,.,.,,(1),.,,[1].,GIS()GPS.,©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[2].2.(),,.CöS,BöS,.2.3:CöS,BöS.CöS,,;BöS,,,(2);,.3,.3,GIS2T():.3.33GIS,,.3.1.,5712:GIS©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(),,,.,,GIS.,,,.3.2GPS1)GPS,,WGS284,;1954(BJ254),1980,,,100m,,,.2)GPSGIS2T,GIS.,.GPS,GIS.3)GPS,GPS()NMEA20183,,,GISE00,DXF.3.3.,,,,.3,3,.,,,4[3].44,GPS,,,(),,.GIS,,,,,[4].4,,.GISGPS,GISGPS[5].1,..,2003,(1):41562,..,2002,(1):67693,,.GIS.,2002,(21):1621671()200529©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(3):16215,.GIS.,2003,(2):1113ResearchonProblemsofTrafficInformationdisposalChenYan1,2)TanYumin2)QiQingwen2)(NanjingInstituteofGeographyandLimnology,CAS,Nanjing210008)1)(InstituteofGeographicSciencesandNaturalResourcesResearch,CAS,Beijing100101)2)AbstractAnalyzingthecontentsofthetrafficinformation,itclassifiestrafficinformationintothreetypes,whicharestatic,dynamicandhistorictrafficinformationrespectively.Basedontheconstructionsofthetrafficinformationplatforminthemiddle,smallcities,integratesthethreesystemrunmodes(CöS,BöSandMobileTerminal)oftheplatform,itpaysmoreattentiontodesignthefunctioncompo2nentsofdataprocessingsub2systemanddoessomeresearchonthekeytechnique.Dynamicinforma2tionisakindofall2importanttrafficinformation,atpresenttwochannelstoobtainthedynamicinfor2mationseparatelyarebyGPSorbyrealtimehigh2resolutionremotesensingimage.From3Sinte2grationpointofview,Thispaperdiscussesthereal2timeacquirementandprocessofthedynamictraf2ficinformation.Inadditionitdiscussesthespatialdistributionofthetrafficinformationanddoessomeworkabouthowtodealwiththem.Keywords:trafficinformation;spatial2enabled;GPSdata(169)ComputationModelsandModalIdentificationTechniqueofShipPropellerShaftBracketSystemLiXiaobinDuZhipengJinXianding(SchoolofNavalArchitectureandOcean&CivilEng.,ShanghaiJiaotongUniv.,Shanghai200300)AbstractPropellershaftbracketsystemofashipwassimulatedbybeamelementmodelandbodyelementmodel.UsingthelargefiniteelementsoftwareofNastran,vibrationofthepropellershaftbracketsystemwascalculatedbasedonthetwomodels.Thecomparisonandanalysisoftwocomputationre2sultsindicatethatthevibrationofpropellershaftbracketsystemcanbecalculatedusingbeamelementmodelinpractice,whichissimple,quickandefficient.However,detailedanalysisandcomputersim2ulationindicatethatthefirstcalculationvibrationmodalwasnotthefirstvibrationmodalofthepro2pellershaftbracketsystem.Inthepaper,effectivemodalmassofthepropellershaftbracketsystemwasstudiedandcalculated.Thepracticeapplicationexpressesthateffectivemodalmasscouldbehelpfultofindnaturalfrequencyandvibrationshape.Keywords:propellershaftbracketsystem;finiteelementmodel;vibrationshape;effectivemodalmass7712:GIS©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.