基金supported by the Scientific Program(62035)of Guangzhou Education Bureau and Techological Program(2008B080701042) of Guang-dong Province, ChinaThe Scientific Program of Guangzhou Education Bureau(62035)
基金Project supported by the national Key Basic Research Development of China( G19980 30 6 0 ) the National Natural Science Foundation ofChina( G10 0 72 0 13) and the Doctoral Program Foundation of institution of Higher Education of China( 980 14 199)