This paper has analyzed the nature resource advantage, expatiated the situation of maize production and consumption, discussed the advantages of science and technology resource and process techniques in Changchun-siping railroad area, and put forward the countermeasure to solving contradiction of maize supply and demand finally.

The influences of structure parameters such as thickness,average float,and cover factor on the heat transfer of the fabric were investigated.

This paper introduces the vertical shaft transformation of Changping Company,expounds the transformation contents of electric system and mechanism system,analyzes on the social benefit and economic benefit after the transformation,and puts forward a good example of vertical shaft transformation and extension.

This paper analyzes the reasons why the Changping Company reforms the wage income distribution system, and expounds the countermeasures adopted by the Changping Company in the reform of the wage income distribution system.

Short fiber radar absorbing sheet was made by double rollers mixing mill,the average length and angle of orientation were measured by optics microscope.

This paper analyses the models of natural texts,studies the statistical characteristics and finds that there is great distance between the average length of words in natural texts and that in the vocabulary of the same ones.