国家科技支撑计划(2006BA105A05),国家自然科学基金(30901613),上海市科委基础研究重大项目(08JC1405300),上海市自然科学基金(09ZR1439100).
Supported by National Key Technology R&D Program of China (2006BA105A05), National Natural Science Foundation of China (30901613), the Major Basic Research Program of Shanghai (08JC1405300), and Shanghai Natural Science Foundation (09ZR1439100).