Compositional graded BaxSr1-xTiO3 (x=0.6,0.7,0.8,0.9,1.0) (BST) thin films (less than 400 nm) were fabricated on Si and ......

吐纳萌芽于人类早期的劳动生活及保健运动之中,上古即已产生.秦汉三国之际全面发展,开拓了仿生吐纳及丹田呼吸理论,出现行气派功法......

The world of natural materials and structures provides an abundance of applications in which mechanics is a critical iss......