广东省科技攻关计划项目(the Key Technologies R&D Program of Guangdong(Province) ; China under Grant No.G03B2040770) ;广东省自然科学基金(the Natural Science Foundation of Guangdong Province of China under Grant No.B6480598) ;湖南省自然科学基金(the Natural Science Foundation of Hunan Province of China under Grant No.05JJ30122)。