TAILIEUCHUNG - Báo cáo khoa học: "Tweet Recommendation with Graph Co-Ranking"

As one of the most popular micro-blogging services, Twitter attracts millions of users, producing millions of tweets daily. Shared information through this service spreads faster than would have been possible with traditional sources, however the proliferation of user-generation content poses challenges to browsing and finding valuable information. | Tweet Recommendation with Graph Co-Ranking Rui Yan Department of Computer Science and Technology Peking University Beijing 100871 China Mirella Lapata Institute for Language Cognition and Computation University of Edinburgh Edinburgh EH8 9AB Uk mlap@ Xiaoming Li b State Key Laboratory of Software Development Environment Beihang University Beijing 100083 China lxm@ Abstract As one of the most popular micro-blogging services Twitter attracts millions of users producing millions of tweets daily. Shared information through this service spreads faster than would have been possible with traditional sources however the proliferation of user-generation content poses challenges to browsing and finding valuable information. In this paper we propose a graph-theoretic model for tweet recommendation that presents users with items they may have an interest in. Our model ranks tweets and their authors simultaneously using several networks the social network connecting the users the network connecting the tweets and a third network that ties the two together. Tweet and author entities are ranked following a co-ranking algorithm based on the intuition that that there is a mutually reinforcing relationship between tweets and their authors that could be reflected in the rankings. We show that this framework can be parametrized to take into account user preferences the popularity of tweets and their authors and diversity. Experimental evaluation on a large dataset shows that our model outperforms competitive approaches by a large margin. 1 Introduction Online micro-blogging services have revolutionized the way people discover share and distribute information. Twitter is perhaps the most popular such service with over 140 million active users as of 516 Twitter enables users to send and read textbased posts of up to 140 characters known as tweets. Twitter users follow others or are followed. Being a follower on Twitter means that the user .

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