[Wu, Hengshan; Yi, Lingzhi] Univ South China, Sch Civil Engn, Hengyang 421001, Peoples R China.
[Yang, Laurence T.; Yi, Lingzhi] St Francis Xavier Univ, Dept Comp Sci, Antigonish, NS B2G 2W3, Canada.
[Wang, Minghua; Deng, Xianjun] Univ South China, Sch Elect Engn, Hunan Prov Key Lab Ultrafast Micronano Technol &, Hengyang 421001, Peoples R China.
[Situ, Yi] Foshan Rd & Bridge Supervis Stn Cooperat Ltd, Dept Bridge Supervis, Foshan 528042, Peoples R China.