Judging methods for vertical open degree of faults in active period and its application;

Density,open degree,extension direction of fracture are comprehensively studied by using field obsevation,core descript.

Study on mining degree and patterns of ground subsidence in condition of mining under thick unconsolidated layers;

udy on rational perforation degree of oil wells in reservoir with bottom water .;

Climatic condition and change dynamic of development level of the potential productivity of winter wheat in Tianshui

Based on the ten-years experimental and statistical data in arid area,semi-arid area and semi-arid and semi-humid area in Tianshui City,Gansu Province,the development level of potential productivity of natural precipitation on drylands has been analyzed,and the moderate development countermeasures of potential productivity in different areas have been put forward.