基金Supported by the National Natural Science Foundation of China under Grant Nos.10527003,60672104the National Basic Research Program of China under Grant No.2006CB705705+2 种基金the Joint Research Subject of Beijing Education Committee of China under Grant No.JD100010607the Beijing Municipal Natural Science Foundation of China under Grant No.3073019the Upgrading Subject of Instrument in Science and Technological Ministry of China under Grant No.2006JG1000~~
