A high efficiency and broad bandwidth grating coupler between a silicon-on-insulator (SOI) nanophotonic waveguide and fi......

This paper presents an efficient method for rigid registration of 3-D point sets,which intends to match the feature poin......

根据对AI800-1.28型离心式鼓风机进行振动监测和频谱分析,指出电机负载端滚动轴承座内孔磨损及联轴器轴心对中不良是引起机组电机......

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为了提高光学系统的成像质量,对离轴抛物面反射镜的面形准确度要求越来越高,这大大增加了反射镜的加工难度.本文基于波像差理论,分......

根据"神龙一号"和"神龙二号"两台直线感应加速器的直线性偏差不超过±0.2 mm、角度误差不超过±2″和高程误差不超过±0.2 mm的总......

InGaN has been predicted to be an efficient photovoltaic material. However, the high-density polarization charges and la......

As an important independent political force in the world, the non-alignedmovement has passed through the vicissitudes of......