期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
Single-photon interconnector composed of two individual one-dimensional nano-waveguides and a single emitter
1
作者 张新琴 夏秀文 +1 位作者 许静平 羊亚平 《Chinese Physics B》 SCIE EI CAS CSCD 2017年第5期177-182,共6页
Recently, theoretical and experimental nano-sized fundamental devices for optical circuits have been proposed at the single-photon level. The assembly of a realistic optical circuit is now a reality. In this work, we ... Recently, theoretical and experimental nano-sized fundamental devices for optical circuits have been proposed at the single-photon level. The assembly of a realistic optical circuit is now a reality. In this work, we introduce a single-photon interconnector composed of two individual nanowires and an optical N-type four-level emitter that can turn the optical connection on and off optically. Because of dipole-induced transmission at the single-photon level, a single photon can travel between the two nanowires reciprocally, which guarantees its application as an all-optical interconnector. 展开更多
关键词 photon emitter waveguide realistic guarantees sized assembly dipole optically reality
下载PDF
Research on uncertainty in measurement assisted alignment in aircraft assembly 被引量:17
2
作者 Chen Zhehan Du Fuzhou Tang Xiaoqing 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2013年第6期1568-1576,共9页
Operations in assembling and joining large size aircraft components are changed to novel digital and flexible ways by digital measurement assisted alignment.Positions and orientations(P&O)of aligned components are ... Operations in assembling and joining large size aircraft components are changed to novel digital and flexible ways by digital measurement assisted alignment.Positions and orientations(P&O)of aligned components are critical characters which assure geometrical positions and relationships of those components.Therefore,evaluating the P&O of a component is considered necessary and critical for ensuring accuracy in aircraft assembly.Uncertainty of position and orientation(U-P&O),as a part of the evaluating result of P&O,needs to be given for ensuring the integrity and credibility of the result;furthermore,U-P&O is necessary for error tracing and quality evaluating of measurement assisted aircraft assembly.However,current research mainly focuses on the process integration of measurement with assembly,and usually ignores the uncertainty of measured result and its influence on quality evaluation.This paper focuses on the expression,analysis,and application of U-P&O in measurement assisted alignment.The geometrical and algebraical connotations of U-P&O are presented.Then,an analytical algorithm for evaluating the multi-dimensional U-P&O is given,and the effect factors and characteristics of U-P&O are discussed.Finally,U-P&O is used to evaluate alignment in aircraft assembly for quality evaluating and improving.Cases are introduced with the methodology. 展开更多
关键词 Aircraft manufacturing Large size components alignment Measurement assisted assembly Quality assurance Uncertainty analysis Uncertainty of position and orientation
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部