1. School of Automation; Wuhan University of Technology; Hubei; Wuhan; 430070; China
2. School of Geodesy and Geomatics; Wuhan University; Wuhan; 430079; China
3. School of Mechanical and Electronic Engineering; Wuhan University of Technology; Hubei; Wuhan; 430070; China
4. Institute of System Sciences; Northeastern University; Liaoning; Shenyang; 110004; China