支持異構(gòu)CAD系統(tǒng)同步協(xié)同的關(guān)鍵技術(shù)研究.pdf

1、南京師范大學(xué)碩士學(xué)位論文支持異構(gòu)CAD系統(tǒng)同步協(xié)同的關(guān)鍵技術(shù)研究姓名：楊君申請學(xué)位級別：碩士專業(yè)：計(jì)算機(jī)應(yīng)用技術(shù)指導(dǎo)教師：竇萬峰20080401南京師范大學(xué)碩士研究生畢業(yè)論文AbstractAbstractIntegrated塒mtheComputerAidedDesign(CAD)technologyandComputerSupposedCooperativeWork(cscw)technology，thecollaborativeC

2、AD，whichiSabletoshortentheproductdevelopmenttime，makesbestuseofremoteresourcesandreducesthedesigncost，hasmadearapidandfurtherprogressinthepastdecade。ThesynchronizedcollaborativedesignamongheterogeneousCADsystemsbecomesas

3、ignificantchallengebecauseofthegreatdifferencebetweenthemodelingoperationsandundergrounddatastructuresofdifferentsystemsInordertOenableit，thisthesismainlyresearchesontheapproachtOconstructingsynchronizedcollaborativedesi

4、gnplatformamongheterogeneousCADsystemsandthemulti—versioningtechniquebasedonversionreplicationforconsistencymaintenanceConsideringtheheterogeneityofCADsystemsindistributedenvironments，aheterogeneousCADcollaborativemodelb

5、asedonmacrosemanticsandthearchitectureforsemanticinteroperationamongdistributedCADsystemsarepresentedAMacroSemanticCommandsbasedapproachtObuildingupasynchronizedcollaborativedesignplatformuponheterogeneousCADsystemsispro

6、posedaccordingtotheextensiverequiementsofthistechnologyByanalyzingthemodelingcommandsandmacrofilesofseveralcommercialCADsystems，thedefinitionsofMacroCommandGroup(MCG)andMacroSemanticCommand(MSC)alegivenandasetofMSCsarede

7、velopedInthisapproach，theMCGscorrespondingtothemodelingoperationsofeachCADsystemsareexchangedbyMSCintheformofXMLMoreovertwokindsoftranslatorsaleestablished，whichCandealwiththetranslationbetweenMCGandMSCThemultiversioning

8、techniquebasedonobjectreplicationstrategycanmeetconsistencymodelwhiletheconflictoperationsoccurringinthecooperativegraphicseditingsystems(CGES)，butitdoesnotefficientlysolveconflictbetweennongeometryattributeoperationsand

9、complexgraphicsobjectsAnewdistributedmulti—versioningmodelbasedonversionreplicationisproposedforconsistencymaintenanceofdiscordantconflictingoperationsaccordingtotheconflictingfeaturesandtypesofconcurrentoperationsinCGES

10、Toguaranteeintentionofconflictingoperations，leafversionsmustbereplicatedfromtheoriginalversionbasedonthereducestrategyandthenapplyingconflictingoperationstothecorrespondingobjectofthedifferentreplicatedversionsTheleafver

11、sionscanbecreatedbyMultipleObjectVersionsIncrementalCreation(MOVIC)algorithminwhichthecomparisonnumberofcompatibleoperationsistoomuchAFastMultipleVersionsIncrementalCreation(FMVIC)algorithmbasedonthecompatibleandconflict

12、groupispresentedinthisthesisThefinalversionsconstructedbytheFMVICalgorithmisthesameas也atconstructedbytheMOVICalgorithm，butitCalldecreasethecomparisonnumberofcompatibleoperationsandnarrowthescopeofcompadsonoperationsforth

13、eremovingredundantversionsFinallyaprototypeofsynchronizedcollab—orativedesignisdevelopedbasedontwocommonCADsystemsThepreliminarytestresultsshowtheproposedapproachworkswellforintegratingvariouscurrentpopularcommercialCADs