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A topic community‐based method for friend recommendation in large‐scale online social networks
Author(s) -
He Chaobo,
Li Hanchao,
Fei Xiang,
Yang Atiao,
Tang Yong,
Zhu Jia
Publication year - 2016
Publication title -
concurrency and computation: practice and experience
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.309
H-Index - 67
eISSN - 1532-0634
pISSN - 1532-0626
DOI - 10.1002/cpe.3924
Subject(s) - computer science , non negative matrix factorization , scalability , recommender system , information overload , pairwise comparison , information retrieval , matrix decomposition , world wide web , combing , service (business) , artificial intelligence , database , physics , economy , quantum mechanics , eigenvalues and eigenvectors , cartography , economics , geography
Summary Online social networks (OSNs) have become more and more popular and have attracted a great many users. Friend recommendation, which is one of the important services in OSN, can help users discover their interested friends and alleviate the problem of information overload. However, most of existing recommendation methods only consider either user link or content information and hence are not effective enough to provide high quality recommendations. In this paper, we propose a topic community‐based method via Nonnegative Matrix Factorization (NMF). This method first applies joint NMF model to mine topic communities existing in OSN by combing link and content information. Then it computes user pairwise similarities and makes friends recommendation based on topic communities. Furthermore, this method can be implemented using the MapReduce distributed computing framework. Extensive experiments show that our proposed method not only has better recommendation performance than state‐of‐the‐art methods but also has good scalability to deal with the problem of friend recommendation in large‐sale OSNs. Moreover, the application case demonstrates that it can significantly improve friend recommendation service in the real world OSN. Copyright © 2016 John Wiley & Sons, Ltd.