国家自然科学基金(the National Natural Science Foundation of China under Grant No.60573097);广东省自然科学基金(the Natural Science Foundation of Guangdong Province of China under Grant No.05200302;No.06104916);国家科技计划项目 (the Key Technologies R&D Program of China under Grant No.2004BA721A02);广东省科技计划项目(the Key Technologies R&D Program of Guangdong(Province);China under Grant No.2005B10101032);高等学校博士学科点专项科研基金(the China Specialized Research Fund for the Doctoral Program of Higher Education under Grant No.20050558017)。