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页数:10页
时间:2019-02-28
《2 a context sensitive model for concept understanding》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、AContextSensitiveModelforConceptUnderstandingWen-LianHsu,Yi-ShiouChenandYuan-KaiWangInstituteofInformationScienceAcademiaSinicaTaipei,Taiwan,R.O.C.hsu@iis.sinica.edu.twAbstractInartificialintelligence,knowledgerepresentationisverycrucialforsimulatinghumanunderstanding.Severalstrategiesh
2、avepreviouslybeenproposedfornaturallanguageunderstanding.ButmanyofthemhavebeenconfinedtoillustrationsintextbooksratherthanbeenactuallyimplementedinlargescaleNLsystems.Thefactisthatdifferentrepresentationschemesareappropriateunderdifferentsituations.Wepresentacontextsensitivemodelforconc
3、eptunderstanding.Ourmodelemphasizesknowledgeutilizationratherthanitsrepresentation.Manydifferentrepresentationschemescanbecombinedinourunderstandingmodelandthespecificschemeofrepresentationisimmaterial.Ourconceptunderstandingstrategycanmodelmanyhumanbehaviorsandreflectpersonaldifference
4、s.OurmodelhasbeenappliedtoseveralNLPsystemsandobtainedverysatisfactoryresults.Ourmaingoalistoreducetheproblemofmodelinghumanunderstandingtothatofmakingcorrectselectionunderdifferentcontexts.Thelatterprovidesanewdirectionfortheimplementationofintelligentsystems.1.IntroductionInartificial
5、intelligence,knowledgerepresentationisverycrucialforsimulatinghumanunderstanding.Severalrepresentations(cf.[1-4],[6-9])havebeenproposedforsyntacticandsemanticanalysisinnaturallanguageprocessing.ButfewofthemhaveactuallybeenimplementedinrealworldNLPsystems.Wetakeadifferentrouteherebyprese
6、ntingacontextsensitivemodelforconceptunderstanding.Ourmodelemphasizestheknowledgeutilizationratherthanitsrepresentation.IthasbeenappliedtoseveralNLPsystemsandobtainedverysatisfactoryresults.Furthermore,certainelementsofuncertaintyareembeddedinthemodelsothatitcanbettersimulatehumanunders
7、tanding.Ourbasicassumptionisthatthespecificschemesusedforrepresentingthemeaningofaconceptisnotcrucialaslongastheysufficetoreflectdifferentaspectsoftheconcept.Therearemanyphenomenasupportingtheaboveargument.Considertwoexamplesbelow:(1)understandingtheproofofamathematicstheorem:W
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