Authors
Jin Liu
School of Higher Technology, Shijiazhuang Tiedao University, Shijiazhuang, China
Yongjun Shen
Department of Mechanical Engineering, Shijiazhuang Tiedao University, Shijiazhuang, China
Shaopu Yang
Department of Mechanical Engineering, Shijiazhuang Tiedao University, Shijiazhuang, China