Jannach D, Zanker M, Felfernig A, et al., An Introduction to Recommender Systems, Cambridge University Press, Cambridge, 2011. Lü L, Medo, et al., Recommender systems, Physics Reports A Review, 2012, 519(1): 1–9. Ke G, Ying F, An Z, et al., Analysis on large-scale rating systems based on the signed network, Physica A: Statistical Mechanics and Its Applications, 2018, 507: 99–109. Huang Z, Zeng D D, and Chen H, Analyzing consumer-product graphs: Empirical findings and applications in recommender systems, Management Science, 2007, 53(7): 1146–1164. Huang Z, Chung W, and Chen H, A graph model for e-commerce recommender systems, Journal of the American Society for Information Science & Technology, 2014, 55(3): 259–274.Īnglade A, Tiemann M, and Vignoli F, Complex-network theoretic clustering for identifying groups of similar listeners in p2p systems, Proceedings of the 2007 ACM conference on Recommender Systems, Minneapolis, MN, USA, 2007. Tao Z, Jie R, Mat M, et al., Bipartite network projection and personal recommendation, Physical Review E, 2007, 76(4 Pt 2): 046115. By discussing the location of negative edges and the sensitivity of object SR Ranking to negative edges, the authors also explore that the negative edges play an important role in the algorithm and explain that why the bad reviews are more important in real networks. The authors analyze the characteristics of top and bottom nodes of the real networks and find out that for objects, the SR Ranking can provide a more reasonable ranking which combines the degree and rating of node, and the algorithm also can help us to identify users with specific rating patterns. Based on the global information, the nodes can be sorted by the Signed PageRank values in descending order, and the result is SR Ranking. This paper proposes the Signed PageRank algorithm for signed bipartite networks to evaluate the object and user nodes at the same time. So these systems can be represented by signed bipartite networks, but the original unsigned node evaluation algorithm cannot be directly used on the signed networks. The ratings in many user-object online rating systems can reflect whether users like or dislike the objects, and in some online rating systems, users can directly choose whether to like an object.
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