中文摘要：

Yuan Su received his Master degree in com- puter science and technology from Beijing University of Posts and Telecommunica- tions （BUPT）, China in 2012. He is cur- rently a PhD candidate there. His research interest is social network analysis and data mining. He is currently working on model- ing and predicting the information diffusion in social networks. E-mail： zhangx @bupt.edu.cn,Xi Zhang received his BS degree from Harbin Institute of Technology, China in 2006, and his PhD degree from Tsinghua University, China in 2012. He is now an assistant professor in School of Computer Science at Beijing University of Posts and Telecommunications （BUPT）, China. He is also in Key Laboratory of Trustworthy Distributed Computing and Service of Ministry of Education, China. He has worked in the areas of data mining and computer architecture. Lixin Liu received his BS degree in soft- ware engineering from Hebei University of Technology, China in 2012 and is cur- rently a master student in Beijing Uni- versity of Posts and Telecommunications （BUPT）, China. His research interest is data mining. He is currently working on large scale graph mining. Shouyou Song received his BS degree in computer science and technology from Huaqiao University, China in 2012 and is currently a master student in Beijing Uni- versity of Posts and Telecommunications （BUPT）, China. His research interest is complex networks and data mining. He is currently working on community detectionin social networks. Binxing Fang is a member of the Chinese Academy of Engineering and a professor in School of Computer Science at Beijing University of Posts and Telecommunica- tions （BUPT）, China. He received his PhD from Harbin Institute of Technology, China in 1989. He is currently the chief scientist of State Key Development Program of Ba-sic Research of China, with the name Basic Research of Social Net- work Analysis and Network Information Diffusion. His current in- terests include social network analysis, 10T search, and information sec