0416 第四篇论文.pptxVIP免费

贪心科技|让每个人享受个性化教育服务Review:PaperReadingMiningandSummarizingCustomerReviews范老师2020/04/16贪心科技|让每个人享受个性化教育服务ContentBackgroundRelatedWorkProblemDefinitionSystemDesignExperimentConclusionReference贪心科技|让每个人享受个性化教育服务BackgroundCountlesscustomerreviewsPotentialcustomer:ViewthereviewsbeforepurchasingProductmanufacturer:Keeptrackofcustomeropinions贪心科技|让每个人享受个性化教育服务RelatedWork1.Subjectivegenreclassification•Noopinionorientation•Classificationisnotdoneatsentencelevel2.Sentimentclassification•Shouldbedefinealexiconmanually,whichisusuallydomain-dependent•Classificationisnotdoneatsentencelevel•Nofeature-extraction3.Textsummarization•Templateinstantiation:notdomain-independent•Passageextraction:onlyidentifysentencesratherthanproductfeaturesandopinions4.Terminologyfinding•Symbolicapproaches:thediscoverednounphrasesleadstolowprecision•Statisticalapproaches:missmanylowfrequencyterms贪心科技|让每个人享受个性化教育服务ProblemDefinitionGeneratefeature-basedsummariesofcustomerreviewsofproductssoldonline.[1]i.Identifyingfeaturesoftheproductthatcustomershaveexpressedtheiropinionson[1]ii.Foreachfeature,identifyingreviewsentencesthatgivepositiveornegativeopinions[1]iii.Producingasummaryusingthediscoveredinformation[1]贪心科技|让每个人享受个性化教育服务SystemDesign贪心科技|让每个人享受个性化教育服务SystemDesign1.Part-of-speechtagging(POS)•Onlyextractnounsandnounphrases2.Frequentfeaturesidentification•Associationmining:CBA(basedonapriorialgorithm)•Compactnesspruning:deletefeatureswhosewordsarenotinadefinedorder•Redundancypruning:ifftrislowerthanathreshold,anditispartofafeaturephrase.从语义的个数上，不构成一个相对有意义的属性单元。贪心科技|让每个人享受个性化教育服务SystemDesign3.Opinionwordsextraction•Onlyextractadjective贪心科技|让每个人享受个性化教育服务SystemDesign4.Orientationidentificationforopinionwords•Relatedworksrelyingonstatisticalinformationisinefficient,foritrequiressearchengine.贪心科...