1. Department of Geophysics, China University of Mining and Technology, Xuzhou, Jiangsu, China
2. School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, China
3. School of Electrical, Computer and Telecommunications Engineering, University of Wollongong, Wollongong, NSW, Australia
4. Department of Civil and Environmental Engineering, University of Illinois at Urbana–Champaign, Champaign, IL, USA
5. Faculty of Mechanical Engineering, Opole University of Technology, Opole, Poland