The pressure signal in the lifting cylinder of the shearer is selected as feature signal, its mean-square deviation is extracted as the feature variable in this
The equations determining a resultant screw of two given screws are applied to thestudies on gearing and meshing theories. A kinematical classification is propo
A great attention has been paid to slowing the degradation of coal nowadays. The spiral bunker is the main measure to lower the degradation. In this paper the a