国家自然科学基金(30271258,3067244);国家重点基础研究项目(“973”计划,2003CB515407);上海市重点基金(06JC14008).
Supported by the National Natural Science Foundation of China(30271258, 3067244), the National Key Basic Research Program of China(973 Project,2003CB515407),and the Key Foundation of Shanghai(06JC14008).