作者机构:[1]Guangdong University of Foreign Studies, Guangzhou 510006, China, [2]State Key Laboratory of Computer Science, Institute of Software, Chinese Academy of Sciences, Beijing 100190, China, [3]School of Computer Science and Engineering, Southeast University, Nanjing 211189, China, [4]Department of Computing Science, the University of Aberdeen, Aberdeen AB24 3UE, UK
相关基金:Supported by the National Natural Science Foundation of China (Nos. 61005043 and 60970045)