1. Department of Mechanical Engineering, University of Houston, Houston, TX 77204
2. Department of Mechanical and Industrial Engineering, New Jersey Institute of Technology, Newark, NJ 07102
3. State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace, Xi’an Jiaotong University, Xi’an 710049, China
4. Department of Physics, University of Houston, Houston, TX 77204