With the rapid development of wireless communication technologies, location-based social networks(LBSNs), such as Foursquare and Gowalla, have become very popular. LBSNs have attracted millions of users to share their social friendship and their locations via check-ins. Plenty of the available check-in information make it possible to mine user’s preference on locations and provided favorite recommendations. However, check-in data is sparse, long-tail, temporal and sociability, besides, there are various types of content information contained in user’s check-in behavior, such as user’s social network and temporal influence. It is challenging for mining user’s preference when facing with such diverse characteristics and complex content information.



 



In this work, we propose a novel tensor-based method that are able to simultaneously consider the long-tail characteristic, temporal and user’s social influence. Our method is founded upon several innovations, firstly, a user-POIs-time tensor is used to model all user’s check-in behaviors. Secondly, considering the long-tail characteristic of user’s check-in information, we applied log transformation to eliminate the influence of longtail. Then we fused social information into a tensor factorization framework. Finally, based on the idea of collaborative filtering, users with similarity features should bring stronger influences to each other, we filled the missing entries of a tensor after clustering the user mode. Experiments on a real check-in database show that the proposed method can provide more accuracy location recommendation. 

5月4日
3:00pm - 4:00pm
地點
https://hkust.zoom.us/j/3997147282 (Passcode: 123456)
講者/表演者
Miss Yiyuan LIU
主辦單位
Department of Mathematics
聯絡方法
付款詳情
對象
Alumni, Faculty and staff, PG students, UG students
語言
英語
其他活動
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