基金Supported by the national Natural Science Foundation of China(60676063)the Science and Technology Commssion of Shanghai Mu-nicipality(05ZR14133,06JC14072)the Knowledge Innovation Program of Chinese Academy of Sciences.
基金supported by The National High Technology Research and Development(No.2006AA12Z135)National Nature Science Foundation of China(Nos.10334030 and 60225004)Knowledge Innovation Program of Chinese Academy of Sciences(Nos.C2-38 and C2-22).