中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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浏览/检索结果: 共8条,第1-8条 帮助

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Active Adjustment of the Subreflector Shape for the Large Dual-Reflector Antenna 期刊论文  OAI收割
MICROMACHINES, 2023, 卷号: 14, 期号: 10, 页码: 1893
作者:  
Xiang, Binbin;  Zheng, Tianxiang;  Wang, Wei;  Lian, Peiyuan;  Kazezkhan, Guljaina
  |  收藏  |  浏览/下载:2/0  |  提交时间:2024/01/10
Tuning the pore structure of plug-containing Al-SBA-15 by post-treatment and its selectivity for C-16 olefin in ethylene oligomerization 期刊论文  OAI收割
MICROPOROUS AND MESOPOROUS MATERIALS, 2014, 卷号: 184, 期号: 1, 页码: 151-161
作者:  
Lin, Sen;  Shi, Lei;  Zhang, Hongpeng;  Zhang, Na;  Yi, Xianfeng
收藏  |  浏览/下载:21/0  |  提交时间:2015/11/02
Tuning the pore structure of plug-containing Al-SBA-15 by post-treatment and its selectivity for C-16 olefin in ethylene oligomerization 期刊论文  OAI收割
MICROPOROUS AND MESOPOROUS MATERIALS, 2014, 卷号: 184, 页码: 151-161
作者:  
Lin, Sen;  Shi, Lei;  Zhang, Hongpeng;  Zhang, Na;  Yi, Xianfeng
收藏  |  浏览/下载:28/0  |  提交时间:2015/06/24
Direct synthesis of Al-SBA-15 containing aluminosilicate species plugs in an acid-free medium and structural adjustment by hydrothermal post-treatment 期刊论文  OAI收割
JOURNAL OF SOLID STATE CHEMISTRY, 2013, 卷号: 203, 期号: 1, 页码: 281-290
作者:  
Shi, Lei;  Xu, Yan;  Zhang, Na;  Lin, Sen;  Li, Xiangping
收藏  |  浏览/下载:24/0  |  提交时间:2015/11/02
Tuning the pore structure of plug-containing Al-SBA-15 by post-treatment and its selectivity for C16 olefin in ethylene oligomerization 期刊论文  OAI收割
Microporous and Mesoporous Materials, 2013, 期号: 184, 页码: 151-161
Lin, S.; Shi, L.; Zhang, H.; Zhang, N.; Yi, X.; Zheng, A.; & Li, X.
收藏  |  浏览/下载:30/0  |  提交时间:2014/03/25
Transferring error analysis of reflex light-tube in azimuth aiming system (EI CONFERENCE) 会议论文  OAI收割
2012 5th International Symposium on Computational Intelligence and Design, ISCID 2012, October 28, 2012 - October 29, 2012, Hangzhou, China
作者:  
Zhao Y.;  Zhao Y.;  Zhao Y.
收藏  |  浏览/下载:32/0  |  提交时间:2013/03/25
基于粮食安全的渭干河流域农业结构调整/Study on Agricultural Structural Adjustment Based on Food Security in the Ogan River Basin[J] 期刊论文  OAI收割
干旱区研究, 2012, 卷号: 29, 期号: 6, 页码: 1112-1120
作者:  
唐宏;  杨德刚;  木坎热木·乃买提;  汪菲;  刘云同
  |  收藏  |  浏览/下载:20/0  |  提交时间:2017/12/29
A design on a control method of a new type of focal plane shutter (EI CONFERENCE) 会议论文  OAI收割
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
Xue L.; Ming L.; Zheng L.-N.; Zhou J.-F.; Zhang H.-W.; Zhang J.-C.
收藏  |  浏览/下载:36/0  |  提交时间:2013/03/25
In order to ensure appropriate exposure time  and no exposure while electric charge is transferring after taking a photograph  it is necessary to have the shutter mechanism cooperate with CCD for area CCD aerial cameras. The ground object illumination has a wide range which is from 4000Lx to 100000Lx  so a shutter which is high efficient and a continuous stepless adjustment are also required. This paper introduces the fundamental principle  structural design and control procedure about this new focal plane shutter. Under the control of DSP  the velocity of shutter curtain governed by the shutter motor can be not only precisely controlled  but also the durability and the reliability are increased. The experiment results have shown that this new shutter has the higher stability of movement  long life span with more than 105 operating times  a wide range of exposure time from1/ 50s to 1/ 320s(depending on the slit width)and the exposure error is less than 10%. With the CCD gain adjustment  the performance of this shutter is fully satisfied with the requirements of area CCD aerial cameras. 2010 IEEE.