资源描述：
《微博信息流中突现话题检测技术的研究》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、杭州电子科技大学硕士学位论文ABSTRACTSinceSinamicrobloggingplatformstarteditsservicein2009,theusers’countofmicroblogkeepsincreasingatahighspeedannually.Attractedbythenewcharactersofmicroblog,peopleuseitcontinuouslyandwidely.Withuniquestructureofusernetworkandhugeinfluencepow
2、er,microbloghasbecomeanewforceofinformationdisseminating.Nowadays,thewholeusersinmicrobloggingplatformgeneratemillionsofpostseveryday,whichleadstothefactthatpeoplecanhardlyobtainusefulinformationfrommillionsofmicroblogposts.Therefore,itismeaningfultoproposeana
3、utomaticmethodforautomaticallydetectingthemostcomprehensiveandlatestemergingtopics.Withsuchamethodcanwemaintainthesocietymorestabilityandharmonious.Thispaperstudiesthekeytechnologiesofdetectingbursttopicsfrommicroblogstreams,includingthefollowtwoparts.Firstly,
4、basedonthebloomcharactersofemergingtopic,amodelcalledBurstKeywordsExtractingModelwasproposed.AfterdefiningadatastructurenamedMicroblogStreamSegment,theextractingmodelutilizes3kindsoftechnologiessuchasslidingwindow,divideandconquerandweightingtechnologies,toext
5、ractburstkeywordsfrommicroblogmessagestream.Experimentresultshaveshownthattheproposedburstkeywordsextractingmethodcanmorecomprehensivelyandaccuratelyextractburstkeywordsofeachtimeintervals.Besides,withtheburstkeywordsextractedfrommicroblogstream,weproposedanot
6、hermodelnamedBurstTopicsDetectingModel.Firstofall,thismodeltakesadvantageoftheInformationRetrievaltechnologiestoconstructthemutualinformationmatrixofkeywordset.Then,thedetectingmodelclustersburstkeywordsetbyiterativelyexpandinganewtopic’skeywordset.Finally，the
7、subsetoftopicalkeywordsareregardastheresultsofclusteringprocedurearethebursttopics.Theexperimentprovedthatthismethodcancomprehensivelyandaccuratelydetectbursttopicsofeachtimeperiod.Inconclusion,basedontheburstcharacterofemergingtopicsinmicroblog,weproposedanew
8、methodtoextractbursttopicalkeywordsandabursttopicdetectingmethodformicrobloggingplatform.Thesetwotechnologiescanhelpuserstotimelyandcomprehensivelygetthelatestbursttopicsinmicroblo
