<正> Based on the mathematical model for rock temperature distribution in a geo-thermal field,the properties of rock temperature distribution in geothermal fiel
<正> Introduced developing process of coal mine automation and communication technology,analyzed present features and characteristics of coal mine automation an
<正> Firstly,the concepts of the traveling wave entropy and the feature function of traveling wave entropy were defined.Then the statistic characters of the tra
<正> In the light of fractal geometry theory, the characteristics of coal's electric parameters (including dielectric constant, alternating conductivity, di