Land Use and Dynamic Change Analysis in Changshou District of Chongqing;

Based on the analysis of current situation of supply and utilization of water resources in Changshou district, the article calculated total amount control of pollutants and amount of reduction in drinking water source region in Longxi River, according to water function regionalization and water quality standard.

According to the relative experimental data of welded structures in the long life range under a variety of random loading spectrums, the law of fatigue cumulation damage for the welded structures in the long life range under variable amplitude loading is analysed by the statistical method.

Study on in vitro culture and micropropagation from the stem sections and t he leaves of Kalanchoe blossfeldiana with red flower;