The paper puts forward the quantization formula by regarding fictitious yield per unit area as one way of contrasting and evaluating the economic results of aquaculture.

It suggests the subjunctive output evaluation method at the bridge of equal value coefficient.

Having analyzed the correlations between the monthly UVB change and the flue-cured tobacco per hectare yield,the first-class tobacco proportion,as well as the tobacco chemical constituents respectively,It argued that there exists an evident negative correlation between the quantity variation of the atmospheric ozone and the flue-cured tobacco output,the first-class tobacco proportion.

The relationship of the cutting dust with primary influence factors is analyzed Taking aim at decreasing cutting dust, roadheader design parameters forming minimum dust per unit coal output are sought by means of optimization method The study shows that dust production per unit coal output of a roadheader may be reduced about 20% after optimized design by this method.