为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......

More than a half of strong earthquakes in the world are located in shallow depth at the subducting plate boundary in squ......

Based on the analysis of the basic characteristics of medium-and large-sized marine gas fields in Sichuan Basin,combined......

With a continuously increasing population and better food consumption levels, improving the efficiency of arable land us......