中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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Dominant modes of geopotential height in the northern hemisphere in summer on interdecadal timescales CNKI期刊论文  OAI收割
2013
作者:  
Yang YX(杨宇星);  Huang F(黄菲);  Wang H(王宏)
  |  收藏  |  浏览/下载:1/0  |  提交时间:2024/12/18
Dominant modes of geopotential height in the northern hemisphere in summer on interdecadal timescales 期刊论文  OAI收割
CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY, 2013, 卷号: 31, 期号: 5, 页码: 1120-1128
作者:  
Yang Yuxing;  Huang Fei;  Wang Hong
收藏  |  浏览/下载:31/0  |  提交时间:2014/07/17
Interdecadal variations of surface winds over China marginal seas CNKI期刊论文  OAI收割
2012
作者:  
Sun C(孙澈);  Yan XM(闫晓梅);  Ma X(马晓)
  |  收藏  |  浏览/下载:2/0  |  提交时间:2024/12/18
Interdecadal variations of surface winds over China marginal seas 期刊论文  OAI收割
CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY, 2012, 卷号: 30, 期号: 6, 页码: 908-921
作者:  
Sun Che;  Yan Xiaomei;  Ma Xiao
收藏  |  浏览/下载:22/0  |  提交时间:2013/09/24
Statistics of gravity wave spectra in the troposphere and lower stratosphere over beijing 期刊论文  iSwitch采集
Science china-earth sciences, 2010, 卷号: 53, 期号: 1, 页码: 141-149
作者:  
Yuan Wei;  Xu JiYao;  Wu YongFu;  Chen HongBin;  Bian JianChun
收藏  |  浏览/下载:30/0  |  提交时间:2019/05/10
Mid-frequency surface error test with a Foucault apparatus (EI CONFERENCE) 会议论文  OAI收割
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, July 8, 2007 - July 12, 2007, Chengdu, China
作者:  
Li J.;  Li J.;  Xuan B.;  Li J.
收藏  |  浏览/下载:20/0  |  提交时间:2013/03/25
Testing of mid-frequency surface error is of the first importance for fast optics  especially for large aperture aspherics. Foucault test plays a dominant role for surface error inspection before the digital interferometer age  but it seems to have faded out these days because no quantitative results turn out. However  an interferometer with high resolution CCDs is either unavailable or unaccessible in the process of manufacture. As its advantages are realized and recognized for the second time  Foucault test is going back to the stage again. A new theory of calculating the contrast of the shadow pattern of Foucault test is put forward in this paper and some modifications are discussed upon the analyses of the limitation of traditional Foucault apparatus. A paraboloidal mirror was fabricated and tested by the modified Foucault apparatus whose effect has been proved to be great. The methods of controlling mid-frequency error are described in the other paper at this conference- "Multi-mode combine manufacturing technology for large aperture aspheric mirrors"1.