基金Supported by the National Natural Science Foundation of China under Grant No.60473064(国家自然科学基金)the National High-Tech Research and Development Plan of China under Grant Nos.2007AA010301,2005AA112030(国家高技术研究发展计划(863))+2 种基金the National Basic Research Program of China under Grant No.2005CB321805(国家重点基础研究发展计划(973))the Key Technologies R&D Program of China under Grant No.2003BA904B02 (国家科技攻关计划)the National Key Technology R&D Program of China under Grant No.2006BAH02A02(国家科技支撑计划)