For more than 20 years I have been traveling the world， preferring often to spend a year or two in different countries ra......

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......

The microstmcture and conductive mechanism of high density polyethylene/carbon black (HDPE/CB) composite were investigat......