作者机构:[1]School of Computer Science and Technology, China University of Mining and Technology, Xuzhou 221116, China, [2]Key Lab of Intelligent Information Processing, Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100080, China
相关基金:Project supported by the National Basic Research Program (973) of China (No. 2013CB329502), the National Natural Science Founda- tion of China (No. 61379101), and the Fundamental Research Funds for the Central Universities, China (No. 2012LWB39)