Systems and methods are provided herein relating to video classification. The rotation shaft of the wind rotor is coupled with the rotor shaft of the single generator set through a connector, or the rotation shaft of the wind rotor is connected with the rotor shafts of multiple generator sets through a transmission mechanism. and a magnification ratio of collected image data in a processor in accordance with the inputted visual field size to reduce an operator’s burden for setting a condition. The foil decreases the energy of the charged particle stream, which decreases a radius of curvature of the charged particle stream in the synchrotron sufficiently to allow a physical separation of the reduced energy charged particle stream from the original charged particle stream.