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1、AProsodicAnalysisofDiscourseSegmentsinDirection-GivingMonologuesJuliaHirschbergChristineH.Nakatani*AT&TLaboratories,2C-409HarvardUniversity600MountainAvenue33OxfordStreetMurrayHill,NJ07974Cambridge,MA02138Abstractthatdiscoursestructuralinformationcanbe
2、inferredfromorthographiccuesintext,suchasparagraph-Thispaperreportsoncorpus-basedresearchingandpunctuation;fromlinguisticcuesintextintotherelationshipbetweenintonationalvari-orspeech,suchascuePHI~.ASES1(Cohen,1984;ationanddiscoursestructure.Weexamineth
3、eReichman,1985;GroszandSidner,1986;Passon-effectsofspeakingstyle(readversussponta-neous)andofdiscoursesegmentationmethodneauandLitman,1993;PassonneauandLitman,(text-aloneversustext-and-speech)onthena-toappear)andotherlexicalcues(Hinkelmanandtureofthisr
4、elationship.WealsocompareAllen,1989);fromvariationinreferringexpres-theacoustic-prosodicfeaturesofinitial,me-sions(Linde,1979;Levy,1984;GroszandSidner,dial,andfinalutterancesinadiscourseseg-1986;Webber,1988;SongandCohen,1991;Passon-ment.neauandLitman,1
5、993),tense,andaspect(Schu-bertandHwang,1990;SongandCohen,1991);fromknowledgeofthedomain,especiallyfortask-1Introductionorienteddiscourses(Grosz,1978);andfromspeakerThispaperpresentsempiricalsupportfortheas-intentions(Carberry,1990;LitmanandHirschberg,s
6、umptionlongheldbycomputationallinguists,that1990;Lochbaum,1994).Recentmethodsforauto-intonationcanprovidevaluablecuesfordiscoursematicrecognitionofdiscoursestructurefromtextprocessing.Therelationshipbetweenintonationalhaveincorporatedthesaurus-basedand
7、otherin-variationanddiscoursestructurehasbeenexploredformationretrievaltechniquestoidentifychangesinanewcorpusofdirection-givingmonologues.Weintopic(MorrisandHirst,1991;Yarowsky,1991;examinetheeffectsofspeakingstyle(readversusIwafiskaetal.,1991;Hearst,
8、1994;Reynar,1994).spontaneous)andofdiscoursesegmentationmethodParallelinvestigationsonprosodic/acousticcues(text-aloneversustext-and-speech)onthenatureoftodiscoursestructurehaveinvestigatedthecontri-thisrelationship.Wealsocomparetheacou
