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1、0本科畢業(yè)論文外文翻譯本科畢業(yè)論文外文翻譯外文文獻(xiàn)原文外文文獻(xiàn)原文wkedwkedinfmationinfmationmanagementmanagementMaterialSource:BTTechnologyJournalAuth:NJDaviesMCRevettEverydaymillionsofpeopletrawltheInterfinfmationusinganyoneofadozenmedifferentsearchtoo
2、ls.Whethertheyfindwhattheyarelookingfmaydependnotonlyontheirskillbutalsoontheirluck.Inthecpatearenaganisationsaremakingincreasingamountsofinfmationavailableviaintras.Thispaperlooksatthelimitationsofcurrentwkedinfmationma
3、nagementtechnologyinparticularshtcomingsintheareasofretrievingganisingsharingofinfmationaninfmationmanagementprocesswhichwouldovercometheseproblemsisdescribed.Therepresentationofauser’sinfmationneedsinterestsinauserprofi
4、leisseentobecentraltotheprocesswkinthisareaincludinganovelnonexplicitapproachtotherepresentationofprofilesiscovered.FourinfmationaccesssystemsdevelopedatBTLabatiesarediscussedtheextenttowhichthesearecurrentlyabletosupptt
5、heinfmationmanagementprocessisconsidered.1.IntroductionEverydaymillionsofpeopletrawltheInterfinfmationusinganyoneofadozenmedifferentsearchtools—butwhethertheyfindwhattheyarelookingfsometimesdependsnotonlyontheirskillbuta
6、lsoontheirluck.Studiesindicatethatmanyexistingsearchenginesdonotmeettheneedsofusers.2.Currenttechnology—somelimitationsThereareanumberofproblemsencounteredwithcurrentinfmationmanagementtechnology.Mostproblemscentrearound
7、difficultiesinfindingrelevantinfmation.Simplekeywdqueriesoftenyieldtoomanyresultsofvariablequality.Itisusualtoreceiveseveralhundredhits(documentsmatchingtheuser’squery)evenonrelativelynarrowqueriestoreceivethoussofhitsfa
8、queryisnotuncommon.Researchalsoshowsthatusersdonotfinditeasytoframethequeryneededto2possiblytoothers.Theclusteringtechniquesmentionedabovecanbeusedtoautomaticallycategiseinfmationfoundintorelatedtopicsfeasierfutureaccess
9、.Thesetofdocumentscanalsoberepresentedin3DwhichcanaidbrowsingsearchingfdocumentsWhenusefulinfmationisfoundtherewilloftenbeadesiretoshareitwithcolleaguesothersthiscanbeautomatede.g.theJasperinfmationagentwillautomatically
10、emailuserswhenpagesofinteresttothemarefound.3.5PushpullmodelsofinfmationaccessUntilrecentlyinfmationhasbeenobtainedfromtheWldWideWebviaarequestreplymechanism‘pull’model—theclientinitiatesarequestfinfmationtheserverreplie
11、s.Insomecircumstanceshowevertheuserwantstobenotifiedwhenthedatahaschanged.Thisrequiresa‘push’infmationmodel.Theusersubscribestoinfmationbypreedtopicareasasinfmationbecomesavailableontheinfmationprovider’sserverthatmatche
12、stheuser’sinterestsitispushedouttotheclient.Thismodelhasobviousadvantagesinareaswhereinfmationneedsarewellknowneasilydefinedwhereinfmationmaybechangingrapidly.4.Personalisation—userprofilinginfmationfilteringonekeytoeffe
13、ctiveinfmationmanagementisuserprofiling—theabilitytorepresentreasonabouttheinterestspreferencesofauser.UseofuserprofilingtechniqueswillallowsoftwaretoautomaticallyfilterpriitiseinfmationfromfexamplecollectionsofInterintr
14、amultimediadocumentsinthefuturefromseveralhundredchannelsofdigitalTV.4.1StatisticalkeywdapproachesKeywd(term)matchingisperhapsthebestunderstoodapproachtodeterminingwhethersomeinfmationisrelevanttoauser’sinterests.Acommon
15、methodfimplementingakeywdmatchingschemeistouseavectspacemodel(VSM).Suchamodelconstructsavectofdimensionmfeachdocumentwheremisthetotalnumberofterms(keywds)usedtoidentifythecontentofthedocumentsinthesystem.4.2Artificialint
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