Institute;
of;
Trlbology;
and;
Rehability;
Engineering;
China;
University;
of;
Mining;
&;
Technology;
Xuzhou;
Jiangsu;
221008,;
China;
School;
of;
Mechanical;
and;
Electrical;
Engineering;
China;
University;
of;
Mining;
&;
Technology;
Xuzhou;
Jiangsu;
221008,;
China;