国家高技术研究发展计划(“863”计划, 2006AA02Z496),国家自然科学基金(30671840, 3077201, 81072479),上海市科学技术委员会基金(08QH14001, 09JC1405400).
Supported by National High-tech R&D Program (“863” Program, 2006AA02Z496), National Natural Science Foundation of China(30671840, 3077201, 81072479), and Funds of Science and Technology Commission of Shanghai Municipality(08QH14001, 09JC1405400).