基金Supported by National High Technology Research and Development Program of China （863 Program） （2006AA04Z182）, National Natu- ral Science Foundation of China （60736021）, and National Creative Research Groups Science Foundation of China （60721062）
基金Supported by National High Technology Research and Development Program of China （863 Program） （2008AA042902）, National Natural Science Foundation of P. R. China （60736021）, and National Creative Research Groups Science Foundation of China （60721061）
基金Supported by National High Technology Research and Development Program of China （863 Program） （2006AA04Z182）, National Creative Research Groups Science Foundation of China （60721062）, and National Natural Science Foundation of China （60736021）
