machine learning techniques for automatic ontology extraction 机器学习的本体自动提取技术

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1、TextMiningAninter-disciplinaryresearchareafocusingontheprocessofderivingknowledgefromtextsExploittechniquesinlinguistics&NLP,statistics,machinelearningandinformationretrievaltoachieveitsgoal:fromtextstoknowledgeTypicaltasksintextminingTextclassificationand

2、clusteringConceptextractionNamedentityextractionSemanticrelationlearningTextsummarizationSentimentanalysis(facebook/twitterpostsanalysis)…TechniquesforTextMiningInformationretrieval+NaturallanguageprocessingWordfrequencydistribution,morphologicalanalysisPa

3、rts-of-SpeechtaggingandannotationParsing,semanticanalysisStatisticalmethodsMachinelearning/dataminingmethodsSupervisedtextclassificationUnsupervisedtextclusteringAssociation/linkageanalysisVisualizationtechniquesMachineLearningTechniquesforAutomaticOntolo

4、gyExtractionfromDomainTextsJanardhanaR.PunuruJianhuaChenComputerScienceDept.LouisianaStateUniversity,USAPresentationOutlineIntroductionConceptextractionTaxonomicalrelationlearningNon-taxonomicalrelationlearningConclusionsandFutureWorksIntroductionOntologyA

5、nontologyOLofadomainDisaspecificationofaconceptualisationofD,orsimply,adatamodeldescribingD.AnOLtypicallyconsistsof:AlistofconceptsimportantfordomainDAlistofattributesdescribingtheconceptsAlistoftaxonomical(hierarchical)relationshipsamongtheseconceptsAlist

6、of(non-hierarchical)semanticalrelationshipsamongtheseconceptsSample(partial)Ontology–ElectronicVotingDomainConcepts:person,voter,worker,pollwatcher,location,county,precinct,vote,ballot,machine,votingmachine,manufacturer,etc.Attributes:nameofperson,modelofm

7、achine,etc.Taxonomicalrelations:Voterisaperson;precinctisalocation;votingmachineisamachine,etc.Non-hierarchicalrelations:Votercastballot;votertrustmachine;countyadoptmachine;equipmentmiscountballot,etc.Sample(partial)Ontology–ElectronicVotingDomainApplicat

8、ionsofOntologiesKnowledgerepresentationandknowledgemanagementsystemsIntelligentquery-answeringsystemsInformationretrievalandextractionSemanticWebWebpagesannotatedwithontologiesUserqueriesforWebpagesanalysedat