[1] School of Computer Science, Qufu Normal University, Shandong, Rizhao, China
[2] School of Computer and Software Engineering, Xihua University, Sichuang, Chengdu, China
[3] Information Center, Third Affiliated Hospital of Sun Yat-sen University, Guangdong, Guangzhou, China
[4] School of Computing and Information Technology, University of Wollongong, Wollongong,NSW, Australia