教育部留学回国人员科研启动基金(the Project-sponsored by SRF for ROCS;SEM; No.教外司留[2005]546 号);湖南省自然科学基金(the Natural Science Foundation of Hunan Province of China under Grant No.05JJ30125);湖南省教育厅资助科研课题(the Research Project of Department of Education of Hunan Province; China under Grant No.06A074)