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Combining trust propagation and topic-level user interest expansion in recommender systems
Högskolan Dalarna, Akademin Industri och samhälle, Informatik.ORCID-id: 0000-0003-3681-8173
2016 (Engelska)Ingår i: International Journal of Web Services Research, ISSN 1545-7362, E-ISSN 1546-5004, Vol. 13, nr 2, s. 1-19Artikel i tidskrift (Refereegranskat) Published
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Abstract [en]

With the development of E-commerce and Internet, items are becoming more and more, which brings a so called information overload problem that it is hard for users to find the items they would be interested in. Recommender systems emerge to response to this problem through discovering user interest based on their rating information automatically. But the rating information is usually sparse compared to all the possible ratings between users and items. Therefore, it is hard to find out user interest, which is the most important part in recommender systems. In this paper, we propose a recommendation method TT-Rec that employs trust propagation and topic-level user interest expansion to predict user interest. TT-Rec uses a reputation-based method to weight users' influence on other users when propagating trust. TT-Rec also considers discovering user interest by expanding user interest in topic level. In the evaluation, we use three metrics MAE, Coverage and F1 to evaluate TT-Rec through comparative experiments. The experiment results show that TT-Rec recommendation method has a good performance. 

Ort, förlag, år, upplaga, sidor
2016. Vol. 13, nr 2, s. 1-19
Nyckelord [en]
Recommender systems, Reputation, Sparsity, Trust propagation, User interest
Nationell ämneskategori
Data- och informationsvetenskap
Forskningsämne
Forskningsprofiler 2009-2020, Komplexa system - mikrodataanalys
Identifikatorer
URN: urn:nbn:se:du-21621DOI: 10.4018/IJWSR.2016040101ISI: 000384810100002Scopus ID: 2-s2.0-84969780540OAI: oai:DiVA.org:du-21621DiVA, id: diva2:934205
Tillgänglig från: 2016-06-08 Skapad: 2016-06-08 Senast uppdaterad: 2021-11-12Bibliografiskt granskad

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Song, William Wei

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Totalt: 304 träffar
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