The project was supported by the National Natural Science Foundation of China(200863009,U1033603);Natural Science Founda-tion of Yunnan Pro-vince(2008CD065);Specialized Research Fund for the Doctoral Program of Higher Education and Program for Innovative Research Team(in Science and Technology)in University of Yunnan Province(IRTSTYN),Science Research Fund of Department of Education of Yunnan Prov-ince(09Y0462)