The 3D model of flapping wing mechanism and veins is constructed in 3D computer aided design (CAD) software UG. Then the......

以MS为基本培养基,通过改变激素种类和浓度成功地从带腋芽的茎段诱导了丛芽.实验表明:2～4mg·L~(-1)BA(6-苄基氨基嘌呤),0.05mg......

多臂机器人系统的两个或多个臂协同夹持一物体时，系统形成闭环构造，可视其为具有约束的多体系统．本文基于ｋａｎｅ方程，实现了约束多体系统的动......

<正>Common effect of wave and slip of internal vehicles will make rolling of the roll-on ship serious. This is one of th......

A new ultawideband circular fractal antenna with notched-band characteristics is presented. A notched-band characteristi......