作者机构:[1]Department of Mathematics Science, Xidian University, Xi'an 710071, China, [2]Key Laboratory of Computer Networks and Information Security, Xidian University, Xi'an 710071, China, [3]School of Automation, Xi'an Institute of Posts and Telecommunications, Xi'an 710121, China
相关基金:supported by the National Natural Science Foundation of China (60970119 60803149); the National Basic Research Program of China (2007CB311201); the Fundamental Research Funds for the Central Universities