1. School of Automation, Wuhan Univ. of Technology, Wuhan, Hubei 430070, China; Dept. of Civil Engineering, Clemson Univ., Clemson, SC 29634 (corresponding author).
2. Ph.D. Candidate, Dept. of Electrical and Computer Engineering, Clemson Univ., Clemson, SC 29634.
3. Associate Professor, Dept. of Civil Engineering, Clemson Univ., Clemson, SC 29634.
4. Associate Professor, Dept. of Electrical and Computer Engineering, Clemson Univ., Clemson, SC 29634.