1. School of Traffic and Transportation Shijiazhuang Tiedao University Shijiazhuang China
2. School of Mechanical Engineering Shijiazhuang Tiedao University Shijiazhuang China
3. Department of Electrical Engineering University of South Carolina Columbia USA
4. State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures Shijiazhuang Tiedao University Shijiazhuang China