1. Associate Professor, School of Highway Engineering, Changsha Univ. of Science and Technology, 45 Chiling Rd., Changsha, Hunan, China 410076.
2. Professor, School of Highway Engineering, Changsha Univ. of Science and Technology, 45 Chiling Rd., Changsha, Hunan, China 410076.
3. Senior Engineer, Guangdong Road and Bridge Construction Ltd. Co., Guangzhou, China.