Group Leader: Prof. Dr. GUO Zhenhua Group Leader: Dr. ZHANG Xuemei (Research Assistant) Ms. ZHAO Lei (Research Assistant) Ms. YANG Yang (Research Assistant) Ph. D. Candidates: Miss WANG Xueqin Miss WANG Xiaoyan Mr. ZHAO Xuyao Miss ZHANG Yinchi MIss LI Xia Mr. YANG Guoqian