1. School of Information Science and Engineering, Central South University, Changsha 410205, China
2. Central South Ultrapower Infotech Co. Ltd., Changsha 410205, China
3. School of Mechanical Engineering, Shenyang Jianzhu University, Shenyang 110168, China
4. School of Transportation Engineering, Shenyang Jianzhu University, Shenyang 110168, China