国家重点基础研究发展计划(批准号:2010CB327604,2011CB808101);国家自然科学基金(批准号:60838004,61078028);教育部科学技术研究计划重点项目(批准号:108032),教育部新世纪优秀人才支持计划(批准号:NCET-07-0597)资助的课题;全国优秀博士学位论文作者专项基金(批准号:2007B34);supported the State Key Development Program for Basic Research of China (Grant Nos. 2010CB327604,2011CB808101);the National Natural Science Foundation of China (Grant Nos. 60838004,61078028);the Key Program of Science and Technology Research of Ministry of Education of China (Grant No. 108032 ),the Program for New Century Excellent Talents in Universities of Ministry of Education of China (Grant No. NCET-07-0597);the Foundation for the Author of National Excellent Doctoral Dissertation of China (Grant No.2007B34)