1. M.S. Candidate, Dept. of Civil Aviation, Nanjing Univ. of Aeronautics and Astronautics, Jiangjun Rd. No. 292, Nanjing, Jiangsu 211106, China.
2. Professor, Dept. of Civil Aviation, Nanjing Univ. of Aeronautics and Astronautics, Jiangjun Rd. No. 292, Nanjing, Jiangsu 211106, China (corresponding author).
3. Lecturer, Dept. of Civil Aviation, Nanjing Univ. of Aeronautics and Astronautics, Jiangjun Rd. No. 292, Nanjing, Jiangsu 211106, China.