1. Master Candidate, Dept. of Engineering, China Univ. of Geosciences, Wuhan 430074, China.
2. Professor, Dept. of Engineering, China Univ. of Geosciences, Wuhan 430074, China (corresponding author).
3. Master Candidate, Dept. of Engineering and IT, Univ. of Syndey, Camperdown, NSW 2006, Australia.
4. Zhejiang Provincial Institute of Communications Planning, Design and Research Co. Ltd., Hangzhou 310058, China.
5. College Graduate, Dept. of Engineering, China Univ. of Geosciences, Wuhan 430074, China.