基金Supported by the National Natural Science Foundation of China under Grant No.60573091 (国家自然科学基金) the National High-Tech Research and Development Plan of China under Grant No.2007AA01Z155 (国家高技术研究发展计划(863))+1 种基金the Program for New Century Excellent Talents in University of China (新世纪优秀人才支持计划)the Beijing Natural Science Foundation of China under Grant No.4073035 (北京市自然科学基金)
