Friend recommendation plays a key role in promoting user experience in online social networks(OSNs).How-ever,existing studies usually neglect users'fine-grained interest as well as the evolving feature of interest,which may cause unsuitable recommendation.In particular,some OSNs,such as the online learning community,even have little work on friend recommendation.To this end,we strive to improve friend recommendation with fine-grained evolving interest in this paper.We take the online learning community as an application scenario,which is a special type of OSNs for people to learn courses online.Learning partners can help improve learners'learning effect and improve the attractiveness of platforms.We propose a learning partner recommendation framework based on the evolution of fine-grained learning interest(LPRF-E for short).We extract a sequence of learning interest tags that changes over time.Then,we explore the time feature to predict evolving learning interest.Next,we recommend learning partners by fine-grained interest similarity.We also refine the learning partner recommendation framework with users'social influence(denoted as LPRF-F for differentiation).Extensive experiments on two real datasets crawled from Chinese University MOOC and Douban Book validate that the proposed LPRF-E and LPRF-F models achieve a high accuracy(i.e.,approximate 50％improvements on the precision and the recall)and can recommend learning partners with high quality(e.g.,more experienced and helpful).

Ming-Min Shao;Wen-Jun Jiang;Jie Wu;Yu-Qing Shi;TakShing Yum;Ji Zhang

College of Computer Science and Electronic Engineering,Hunan University,Changsha 410082,China;Department of Computer and Information Sciences,Temple University,Philadelphia 19122,U.S.A.;School of Computer Science and Engineering,Northeastern University,Shenyang 110819,China;Department of Information Engineering,Chinese University of Hong Kong,Hong Kong 999077,China;Department of Mathematics and Computing,University of Southern Queensland,Brisbane,QLD 4350,Australia

计算机科学技术学报（英文版）

[1]Ming-Min Shao;Wen-Jun Jiang;Jie Wu;Yu-Qing Shi;TakShing Yum;Ji Zhang-.Improving Friend Recommendation for Online Learning with Fine-Grained Evolving Interest)[J].计算机科学技术学报（英文版）,2022(06):1444-1463

LPRF,crawled

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