国家自然科学基金项目.31060003,31060001;教育部春晖计划项目Z2012022;西华大学重点科研基金项目Z1220530;教育部科学技术重点项目209145;the National Natural Science Foundation of China.31060003,31060001;the Chunhui Project of Department of Science and Technology of Ministry of Education of ChinaZ2012022;the Key Research Fund Project of Xihua UniversityZ1220530;the Key Science and Technology Project of Ministry of Education of China209145