To study the economic advantages of hydrogen internal combustion engine,an experimental study was carried out using a 2.......

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......

为了解激光波长对含能材料起爆阈值的影响，降低含能材料的激光起爆能量，提高激光激励源的小型化程度，采用飞行时间质谱技术和Bruccton......

The capillary absorption of water by unsaturated cement-based material is the main reason of degradation of the structur......