国家自然科学基金重点项目41430528;中国科学院战略性先导科技专项项目XDA05080100;科技基础性工作专项项目2011FY120300 [Key Program of National Natural Science Foundation of China,No.41430528;The Strategic Priority Research Program of the Chinese Academy of Sciences,No.XDA05080100;Basic Research Project of the Ministry of Science and Technology,No.2011FY120300]