1. School of Mechanical Engineering, Beijing Institute of Technology,Beijing,China
2. School of Vehicle and Mobility, Tsinghua University,Beijing,China
3. University of Michigan,Department of mechanical engineering,Ann Arbor,MI,USA
4. Tongji University,Key Laboratory of Road and Traffic Engineering of the Ministry of Education,Shanghai,P.R. China,4800
5. Carnegie Mellon University,Department of Mechanical Engineering,Pittsburgh,PA,USA,15213