作者机构:[1]School of Computer, National University of Defense Technology, Changsha 410073, China, [2]School of Microelectronics, Xidian University, Xi 'an 710071, China
相关基金:Project supported by the National Natural Science Foundation of China (No. 60703074) and the National High-Tech Research and Development Program of China (No. 2009AA01Z 124).