1. Associate Professor, School of Mechanical Engineering and Automation, Wuhan Univ. of Science and Technology, Hubei, Wuhan 430081, China.
2. Postdoctoral Researcher, Dept. of Electrical and Computer Engineering, Univ. of Houston, Houston, TX 77204-4006.
3. Graduate Student, School of Mechanical Engineering and Automation, Wuhan Univ. of Science and Technology, Hubei, Wuhan 430081, China.
4. Professor, Dept. of Mechanical Engineering, Univ. of Houston, Houston, TX 77204-4006 (corresponding author).