1. School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan, China
2. Mathematics Department, Grinnell College, Grinnell, IA, USA
3. School of Information and Communication Engineering, Communication University of China, Beijing, China
4. Department of Industrial and Systems Engineering, Lehigh University, Bethlehem, USA
5. Department of Mechanical Engineering, Stanford University, Stanford, CA, USA