基金国家科技公关计划项目(the Key Technologies R&D Program of China under Grant No.2001BA201A32)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.2002AA415270)
基金This work was supported by National Natural Science Foundation of China(NNSFC) 10471096and Shenyang Normal University Doctoral Foundation 55440101007.