中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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长春光学精密机械与物... [2]
合肥物质科学研究院 [1]
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Immobilization of simulated An(3+) into synthetic Gd2Zr2O7 ceramic by SPS without occupation or valence design
期刊论文
OAI收割
CERAMICS INTERNATIONAL, 2021, 卷号: 47
作者:
Luo, Fen
;
Tang, Hexi
;
Shu, Xiaoyan
;
Chen, Zhi
;
Xu, Chen
|
收藏
|
浏览/下载:56/0
|
提交时间:2021/04/26
SPS
Gd2Zr2O7 ceramic
Simulated An(3+)
Solubility
Design of a miniature axial flux flywheel motor with PCB winding for nanosatellites (EI CONFERENCE)
会议论文
OAI收割
2012 International Conference on Optoelectronics and Microelectronics, ICOM 2012, August 23, 2012 - August 25, 2012, Changchun, China
Wu J.
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浏览/下载:42/0
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提交时间:2013/03/25
This paper presents the design and analysis of an axial flux permanent-magnet (AFPM) machine for nanosatellites application. It is a miniature axial flux surface mounted permanent magnet flywheel motor
using a printed circuit board (PCB) stator winding. The PCB stator has simplified the design and construction and avoids unnecessary space
since size reduction has become one of the most important aspects of flywheel motor design for nanosatellites. The performances of the machine are estimated by combination method of three-dimensional (3D) electromagnetic finite element analysis (FEA) and approximate theoretical analysis. The back EMF and electromagnetic torque are derived. A comparison between the analysis and experimental measurement results of the prototype machine is also presented. Both simulated and experimental results show that the proposed motor would be an acceptable solution for the nanosatellite applications with advantages such as simple structure and low-cost
as multi-layer circuit board production techniques have made the production of printed circuit coils cheaper and easier. 2012 IEEE.
Analysis of spectrum narrowing of diode laser bar (EI CONFERENCE)
会议论文
OAI收割
Semiconductor Lasers and Applications III, November 12, 2007 - November 13, 2007, Beijing, China
作者:
Liu Y.
;
Wang L.
;
Wang L.
;
Wang L.
;
Liu Y.
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浏览/下载:18/0
|
提交时间:2013/03/25
Laser diode bar (LDB) are used increasingly often for many applications
but spectral bandwidth of LDB are generally approximately 2-4nm
far too wide for many demanding applications
e.g. spin-exchange optical pumping
terahertz generation
and lidar. External-cavity feedback can improve the spectral properties of LD or LDB. However
spectrum narrowing of LDB is more difficult than that of LD. Bar curvature (i.e. "smile") produced in the manufacturing process affects the spectrum narrowing greatly. By geometrical optics approach and ORIGIN software
smile which can be corrected by plano-convex cylindrical lens is simulated and the result is in good agreement with experiment. The selection of grating which is also a critical factor of spectrum narrowing will be stated. Finally
an external cavity consisting of fast axis collimator
two plano-convex cylindrical lens and a diffraction grating is used. The scheme is implemented on a 19-element LDB and yields 3-fold reduction in spectral linewidth under the situation that all optical elements in the system which are not optimized. Further
we use a slit in the experiment and analyze the spectrum narrowing of each element in LDB.
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