作者机构:[1]LMAM, School of Mathematical Sciences, Peking University, Beijing 100871, P. R. China
相关基金:Project supported by the National Basic Research Program of China (No. 2003CB716101), the National Natural Science Foundation of China (No. 60532080), the Science Foundation of Chinese Ministry of Education (No. 306017), the Science Foundation of Engineering Research Institute of Peking University, and the Science Foundation of Microsoft Research of Asia.