Water environmental capacity of Lijiang River within Guilin city is researched. The relationship among concentration of pollutants and flow rate as well as wate
Through analyzing the effects of water consumption, diameter of solid particle, and flow velocity on the fluidity of high water content material slurry, the rel
One of the key points in restructuring the coal industry is to close some deficient coal mines which haveneither economic result nor social benefit. Based on th
A calculation method of contact problem of plastic gears based on three parameter model of viscoelasticity material is presented. In this calculation method, th
Three numeric simulston and optimal managernent models on groundwater resources are introduced m this paper. These models stand for the present developing level