1. Master’s Candidate, Beijing Key Laboratory of General Aviation Technology, Beijing Univ. of Civil Engineering and Architecture, 15 Yongyuan Rd., Beijing 100044, China.
2. Professor, Beijing Key Laboratory of General Aviation Technology, Beijing Univ. of Civil Engineering and Architecture, 15 Yongyuan Rd., Beijing 100044, China (corresponding author).
3. Lecturer, Beijing Key Laboratory of General Aviation Technology, Beijing Univ. of Civil Engineering and Architecture, 15 Yongyuan Rd., Beijing 100044, China.
4. Professor, Institute of Transportation Engineering and Geomatics, Tsinghua Univ., 30 Shuangqing Rd., Beijing 100084, China.