基金Supported by the National Natural Science Foundation of China under Grant No.60875031(国家自然科学基金)the National Basic Research Program of China under Grant No.2007CB311002(国家重点基础研究发展计划(973))+2 种基金the Program for New Century Excellent Talents in University of china under Grant No.NECT-06-0078(新世纪优秀人才支持计划)the Research Fund for the Doctoral Program of Higher Education of the Ministry of Education of China under Grant No.20050004008(教育部高等学校博士学科点专项科研基金)the Fok Ying-Tbng Education Foundation for Young Teachers in the Higher Education Instirutions of China under Grant No.101068(霍英东教育基金会高等院校青年教师基金)