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......

To find new chalcogenide glass possessing larger second-order non-linearity,glasses with compositions Ge-Ga-X-S (X=P,As,......

The lead-free piezoelectric ceramics (K0.5Na0.5)NbO3 (abbreviated as KNN) with the relative density of 97.6% were synthe......