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ID:33377525
大小:5.57 MB
页数:62页
时间:2019-02-25
《基于可信机制与用户偏好模型的推荐技术的-研究与应用》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、AbstractTrust·basedrecommendationhasbeenanimportantresearchtopicinrecommende,rsystemresearch.Inthisthesis,inordertosolvetheproblemofuser-tagpreferencesparsityandthatitishardtorecommendwhenthenumberoftrustedusersisnotenough,wefocusonatrust-basedrecommendationmodelwithuser-tagpreference.Thus,wec
2、allrecommendusers’interestingresourcestothem.Themainresearchesinthisthesisinclude:1)ResearchesonrelatedtrustmodelsandproposalofanewtrustmodelcalledMPDTrust,consideringbothimplicitdirecttrustandindirecttrust.ImplicitdirecttrustinMPDTrustisbasedonratinginformationofusersconsideringthenumberofuse
3、rs’CO—rateditems,ratingtimeandratingerror.IndirecttrustinMPDTrustisbasedonTidalTrustconsideringthemaximumtrustpropagationdistance.2)Researchesonuser-tagpreferencemodels.Notonlyusers’ratingsandtagswereconsideredincalculatinguser-tagpreferences,butalsotimeinformationwasconsidered.Inaddition,wepr
4、esentamethodofexpandinguser‘tagpreferenceswithconsideringthecorrelationoftagsandtagpreferencesoftrustedusers.3)Proposalofatrust-basedrecommendationmodelwithuser·tagpreference,calledTUPTR.4)DesignandimplementationtheTFUPFilmrecommendersystem.Ourmaincontributionsinthisthesisare"1)Proposalofatrus
5、tmodelbasedonmaximumtrustpropagationdistance,whichconsidersimplicitdirecttrust.2)Proposalofamethodofextendinguser-tagpreferencesconsideringthecorrelationoftagsandtagpreferencesoftrustedusers.3)Proposalofatrust—basedrecommendationmodelwithuser-tagpreference,calledTUPTR.Theresearchinthisthesiswo
6、uldbevaluabletothestudiesofrecommendationbasedontrustnetworkanduserpreference.Keywords:trust;tag;userpreference;recommendationII图目录图2-1信任的非对称性⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯.8图2.2信任的传递性⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯.8图2.3不同类型信任的组合⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯9图2.4不同信任路径的组合⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯9图2.5信任网络示例⋯⋯⋯⋯⋯⋯⋯
7、⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯一11图2-6在信任网络中计算trust(S,E)⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯.12图2.7TidalTrust模型中设定阈值的过程⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯13图2—8抛弃高可信长路径的示例⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯一14图2-9乘法算子导致信任值过低的示例⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯.15图2.10信任计算⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯。16图2.11信任网络中间接信任的路径选择
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