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Duan Hai-bin1; Wang Dao-bo2; Yu Xiu-fen3
1. School of Automation Science and Electrical Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, P. R. China . 2.College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China 3. Centre for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100080, P. R. China