国家自然科学基金(No.30471599);国家重点基础研究发展(973)计划资助项目(No.2005CB724300-G);上海科技发展基金(No.03ZR14057);Supported by the National Natural Science Foundation of China(No.30471599);the Major State Basic Research Development(973)Program of China(No.2005CB724300-G)(03DZ14025);the Science and Technology Development Program of Shanghai(No.03ZR14057)