作者机构:[1]College of Electric Power, South China University of Technology, Guangzhou 510640, China, [2]College of Physics and Electronic Engineering, Guangxi Normal University, Guilin 541004, China
相关基金:Project supported by the Key Program of National Natural Science Foundation of China (Grant No. 50937001), the Na- tional Natural Science Foundation of China (Grant Nos. 50877028, 10947011 and 10862001), the High Technology Research and Development Program of China (Grant No. 2007AA05Z229), the Science Foundation of Guangdong Province, China (Grant No. 8251064101000014), and the Construction of Key Laboratories in Universities of Guangxi Province, China (Grant No. 200912).