1. Postgraduate, School of Civil Engineering, State Key Laboratory of Hydroscience and Engineering, Tsinghua Univ., Beijing, China.
2. Lecturer, Training Base, Army Engineering Univ., Xuzhou, China.
3. Assistant Professor, School of Economics and Management, Beijing Jiaotong Univ., Beijing, China.
4. Professor, School of Civil Engineering, State Key Laboratory of Hydroscience and Engineering, Tsinghua Univ., Beijing, China.