We theoretically demonstrate the imaging properties of a complex two-dimensional(2D)face-centered square lattice photoni......

活塞环是柴油机的关键部件之一 ,如果出现故障将严重影响柴油机的性能 .文中介绍了时频分析理论 ,利用时频分析方法对柴油机正常和......

In the paper a self-adjusting hydraulic machine for combination forming of upsetting and extruding is systematacially pr......

Hollow cylinders are widely used in spacecraft,rockets,weapons,metallurgy,materials,and mechanical manufacturing industr......

To improve the automation level of the vehicle drive axle test and better simulate a vehicle′s actual operation, an adv......

Although "clienteling" might have anumber of definitions...