基金Supported by National Natural Science Foundation of China(70501006)Natural Science Foundation of Hunan Province(06JJ50419)+1 种基金Science Research Fund of Hunan Provincial Education Department(06C097)Research start Foundation of Changsha University of Science and Technology(52129905)
基金Supported by the National Natural ScienceFoundation(103410020)Supported by the Guangdong Provincial NaturalScienceFoundation of China(0501332)Supported by the Guangdong EducationalDepartment Natural Science Foundation of China