Objective To establish common body temperature(BT) variation curve of patients with simple lumber disc excision so as to find abnormal temperature and its causes in good time.

By compiling a computer program with computer-human dialogues and further by displaying a variation curve of errors in calculating celestial body s bearings,the variation of the errors in calculating celestial body s bearings will be readily understood,so that the best timing of observatio.

This paper adopts the Welch estimation method and Chebyshev window,analyses the relation between noise signal and ball mill load,analyses the structure of the ball mill noise signal,provides a method to search characteristic spectra of the signal and ascertain it according to the energy-time variation curve,achieve the ball mill load measurement.