可适应的实时协同编辑系统若干问题研究

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1、浙江大学博士学位论文可适应的实时协同编辑系统若干问题研究姓名：徐向华申请学位级别：博士专业：计算机应用技术指导教师：陈纯20050501浙江大学博。l。学位论文AbstractDistributedReal—timecollaborativeeditingsystemallowsagroupofuserstoviewandeditthesametext／graphic／image／multimediadocumentatthesametimefromgeographicallydispersedsitescomaectedb

2、ynetworks．Theyhavemanyapplicationssuchascollaborativewriting／authoring，computer-supportedcooperativelearning，collaborativeCAD，collaborativeprogramminganddebugging，andelectronicconference，ere．Theyprovideaconvenientvirtualworkspaceforcollaborationandcommunicationamon

3、gpeople．Inrecentyears，withintegrationofwiredandwirelessnetworktechnology,andwidelyutilizationofmobilecomputingdevices，Intemetisbecominganewcomputingnetworkingenvironment，inwhichpeopleCanaccessandacquirecomputationandinformationresourcesatanywhereandanytime．Fromthep

4、erspectiveofcooperativecomputing，Internetenvironmenthassomenewfeatures：mobilityofcooperativeparticipantsandtheirdevices，diversityofcomputingdeviceandnetworkconnection．Thesefeaturespresentasdynamicchangingofparticipant’Slocationandresourcesofcomputationandnetworkint

5、heprocessofcollaboration．ThesefeaturesrestricttheuseofexistingcollaborativetechnologiesinthenewIntemetenvironment．ItisnecessarytoinvestigatenewcollaborativetechnologiesthatmeettheneedsofcollaborationinInternetenvironn]ent，Inthispaper,severalkeyissuesofIntemet··base

6、dreal··timecollaborativeeditingsystemsareinvestigated，suchasconcurrencycontrolandconsistencymaintenanceinimage-basedcollaborativeediting，conflictionpreventionmechanismsincollaborativegraphicsediting，anddynamicarchitectureofcollaborativesystems．Theinvestigationiscom

7、binedwithkeyissuesintheresearchprojectof‘‘ResearchonkeytechnologiesintheIntemet-basedcollaborativepattemCAD／CAMsystem”．AdistributedImageOPerationTransformation(dlOP砷algorithmwasproposedtoachieveconsistencymaintenanceofimageincollaborativeeditingsystems，AnAnyundofra

8、meworkandrelatedalgorithmsforcollaborativeimageeditingareproposed，whichimplementstheseparationofundomodeandundomechanism．Theundomechanismsupports