1. Key Laboratory of Advanced Technology of Near-Space Information Systems, School of Electronic and Information Engineering, Beihang University, Beijing, China
2. School of Engineering and Materials Science, Queen Mary University of London, London, U.K.
3. Department of Civil and Environmental Engineering, University of South Florida, Tampa, Florida, USA
4. State Key Laboratory of Management and Control for Complex Systems, Institute of Automation, Chinese Academy of Sciences, Beijing, China