Supported by the National Natural Science Foundation of China under Grant No.60703014 (国家自然科学基金); the National BasicResearch Program of China under Grant No.G2005CB321806 (国家重点基础研究发展计划(973)); the National High-Tech Research andDevelopment Plan of China under Grant No.2009AA01Z437 (国家高技术研究发展计划(863)); the Specialized Research Fund for theDoctoral Program of Higher Education of China under Grant No.20070213044 (高等学校博士学科点专项科研基金); the ChinaPostdoctoral Science Foundation under Grant No.20070410263 (中国博士后科学基金); the Heilongjiang Postdoctoral Foundation ofChina under Grant No.LBH-Z07108 (黑龙江省博士后资助); the Development Program for Outstanding Young Teachers in HarbinInstitute of Technology of China under Grant No.HITQNJS.2007.034 (哈尔滨工业大学优秀青年教师培养计划)