作者机构:[1]Institute of Information and Communication Engineering, Zhejiang University, Hangzhou 310027, China, [2]Zhejiang Provincial Key Laboratory of Information Network Technology, Zhejiang University, Hangzhou 310027, China
相关基金:Project supported by the National Natural Science Foundation of China (Nos. 60505017 and 60534070) and the Science Planning Project of Zhejiang Province, China (No. 2005C14008)