国家高技术研究发展计划(863)(the National High-Tech Research and Development Plan of China under Grant No.2007AA04Z174);留学归国人员科研基金(the Overseas-Return Academy Foundation of Chinese Educational Ministry under Grand No.2006-331);河南省教育厅自然科学基金(the Natural Science Foundation of Henan Educational Department under Grand No.200510459017)