文献检索英文.ppt

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1、Information RetrievalGeorge2015-10-29ThereasontochoosetopicInformationRetrievalDatabasesLibrary&InfoScienceMachineLearningPatternRecognitionDataMiningNaturalLanguageProcessingApplicationsWeb,Bioinformatics…StatisticsOptimizationSoftwareengineeringComputersystems

2、ModelsAlgorithmsApplicationsSystemsComputerVisionAnalysisRetrievalDiscoveryManagementInformationretrievalisimportant!BestsearchleadstobestresearchOutlineIdentifyyourquestion(need)WheretofinddataRefinerySection1:IdentifyyourquestionStructuringourresearchquestionA

3、nanimalFourlegsRoundheadCatchratLikefishActiveatnightHowtodeterminethequestion？Encyclopedia,Books,RelevantresearchSectionII:WheretofinddataSearchengineAcademicdatabaseFreePopularityEasyProfessionTargetedChargeNoresultsyouwant?UserInformationNeedDocumentsDocument

4、RepresentationQueryRepresentationHowtomatch?UncertainguessofwhetherdocumenthasrelevantcontentUnderstandingofuserneedisuncertainCoverage(Recall)Accuracy(Precision)StringWordPhraseConceptThemachineisnotassmartasyouANDORNOTSectionIII:RefineryToomany？conferencedataL

5、astbutnotleastExample：practicebyyourselfSummaryReferences:1.LuZ,KimW,WilburWJ.EvaluationofqueryexpansionusingMeSHinPubMed[J].Informationretrieval,2009,12(1):69-80.2.SkaikY.Medicalliteraturereview:Searchorperish[J].Pakistanjournalofmedicalsciences,2013,29(2):680.

6、Source:MaterialfromgoogleFurtherlearning：MOOC、NeteasecloudclassroomThankYouforyourAttentionAnyquestion?