1. Associate Professor, College of Civil Aviation, Nanjing Univ. of Aeronautics and Astronautics, No. 29 Jiangjun Rd., Nanjing 211106, People’s Republic of China.
2. Professor, College of Energy and Power Engineering, Nanjing Univ. of Aeronautics and Astronautics, No. 29 Yudao St., Nanjing 210016, People’s Republic of China (corresponding author).