1. Postgraduate Student, College of Field Engineering, Army Engineering Univ. of PLA, Haifuxiang 1th, Xuanwu District, Nanjing 210000, China.
2. Associate Professor, College of Field Engineering, Army Engineering Univ. of PLA, Haifuxiang 1th, Xuanwu District, Nanjing 210000, China (corresponding author).
3. Lecturer, College of Field Engineering, Army Engineering Univ. of PLA, Haifuxiang 1th, Xuanwu District, Nanjing 210000, China.