Exploiting Structural and Temporal Influence for Dynamic Social-Aware Recommendation  

作　　者：Yang Liu Zhi Li Wei Huang Tong Xu En-Hong Chen 

机构地区：[1]Anhui Province Key Laboratory of Big Data Analysis and Application,University of Science and Technology of China Hefei 230027,China

出　　处：《Journal of Computer Science & Technology》2020年第2期281-294,共14页计算机科学技术学报（英文版）

基　　金：This work was partially supported by the National Key Research and Development Program of China under Grant No.2018YFB1402600;the National Natural Science Foundation of China under Grant Nos.61703386 and U1605251;the MSRA(Microsoft Research Asia)Collaborative Research Project.

摘　　要：Recent years have witnessed the rapid development of online social platforms,which effectively support the business intelligence and provide services for massive users.Along this line,large efforts have been made on the socialaware recommendation task,i.e.,leveraging social contextual information to improve recommendation performance.Most existing methods have treated social relations in a static way,but the dynamic influence of social contextual information on users'consumption choices has been largely unexploited.To that end,in this paper,we conduct a comprehensive study to reveal the dynamic social influence on users'preferences,and then we propose a deep model called Dynamic Social-Aware Recommender System(DSRS)to integrate the users'structural and temporal social contexts to address the dynamic socialaware recommendation task.DSRS consists of two main components,i.e.,the social influence learning(SIL)and dynamic preference learning(DPL).Specifically,in the SIL module,we arrange social graphs in a sequential order and borrow the power of graph convolution networks(GCNs)to learn social context.Moreover,we design a structural-temporal attention mechanism to discriminatively model the structural social influence and the temporal social influence.Then,in the DPL part,users'individual preferences are learned dynamically by recurrent neural networks(RNNs).Finally,with a prediction layer,we combine the users'social context and dynamic preferences to generate recommendations.We conduct extensive experiments on two real-world datasets,and the experimental results demonstrate the superiority and effectiveness of our proposed model compared with the state-of-the-art methods.

关 键 词：RECOMMENDER system SOCIAL INFLUENCE sequential RECOMMENDATION 

分 类 号：TP39[自动化与计算机技术—计算机应用技术]