1. Key Laboratory of Mathematics Mechanization, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing, China
2. Department of Electrical and Systems Engineering, Washington University, St. Louis, MO, USA
3. Research School of Electrical, Energy and Materials Engineering, Australian National University, Canberra, ACT, Australia
4. Australian Center for Field Robotics, School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, NSW, Australia