The Low Frequency Synchromotor Drive Mine Hoist System fed by the cycloinverter has good features from the technological and economical point of view. According
A serics of physical modelings in which a main roof is considered as a Kirchhoff plate supported or clammed by Winkler elastic foundation were performed to simu
Using the Hodges-Ajne testing method, the uniformity of China retail price index was tested. The result, that population is submitting to uniform dist ribution,
All the underground coal mines in China are gassy mines. The gas emission at coal face increasingly grows with the increase of working depth and coal output,for
In this article,we have given the definition of the Heilbronn number of nnoncollinear points in the plane. By this, we got the exact value of Hs which is the ex
This paper introduces a new-developed mine fire-resistant optical fiber cable (OrC) KLS004 ,its structural characteristics, main feature, the theory about fire
By means of whisker reinforce and paricle dispersion, the routes of property improvement on Si3N4 ceramic material have been studied. The mecihaniacl properties