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浏览/检索结果: 共9条,第1-9条 帮助

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Numerical investigation of centerline curvature effects on a compact S-shaped intake 期刊论文  OAI收割
JOURNAL OF THERMAL SCIENCE, 2012, 卷号: 21, 期号: 5, 页码: 413-419
作者:  
Huang, Enliang;  Zhao, Shengfeng;  Lei, Zhijun;  Kang, Jianxiong;  Lu, Xingen
收藏  |  浏览/下载:32/0  |  提交时间:2015/11/03
Numerical Investigation of Centerline Curvature Effects on a Compact S-shaped Intake 期刊论文  OAI收割
JOURNAL OF THERMAL SCIENCE, 2012, 卷号: 21, 页码: 413,419
Enliang Huangl 2; Shengfeng Zhao1; Zhijun Leil; Jianxiong Kangl; Xingen Lul; Junqiang Zhul
收藏  |  浏览/下载:23/0  |  提交时间:2013/01/31
Numerical Investigation of Centerline Curvature Effects on a Compact S-shaped Intake 期刊论文  OAI收割
JOURNAL OF THERMAL SCIENCE, 2012, 卷号: 21, 页码: 413,419
作者:  
Enliang Huangl 2;  Shengfeng Zhao1;  Zhijun Leil;  Jianxiong Kangl;  Xingen Lul
  |  收藏  |  浏览/下载:19/0  |  提交时间:2013/01/31
Alignment of off-axis asphere and compensator with four poles (EI CONFERENCE) 会议论文  OAI收割
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, November 19, 2008 - November 21, 2008, Chengdu, China
作者:  
Li J.;  Chen Y.
收藏  |  浏览/下载:58/0  |  提交时间:2013/03/25
Aspheres are utilized widely thanks to the development of optical design  manufacture and testing. Compensators are usually necessary when aspheres are under test. The alignment of aspheres and their compensators is a risk because it's tough to check whether the compensators work in right way. A new method of alignment with four poles is put forward in this paper. Optical interval error can be tight while it is quite important due to direct influence on central curvature  conic constant and high order coefficients of aspherical surface. A modified on-axis Foucault apparatus is set up since it makes the optical axis visible and helps to control the error of off-axis amount. Some small holes are drilled in the metallic cell of the compensator so that the ends of poles can be stably relied on in order to increase operational repeatability. The method has been carried out practically and it matches the measurement result given by a set of theodolites. 2009 SPIE.  
Influence of the TDI CCD camera takes pictures when high resolution satellite lateral swaying (EI CONFERENCE) 会议论文  OAI收割
2009 IEEE International Conference on Mechatronics and Automation, ICMA 2009, August 9, 2009 - August 12, 2009, Changchun, China
作者:  
Zhang L.;  Zhang L.;  Sun Z.
收藏  |  浏览/下载:18/0  |  提交时间:2013/03/25
Finsler conformal transformations and the curvature invariances 期刊论文  iSwitch采集
Publicationes mathematicae-debrecen, 2007, 卷号: 70, 期号: 1-2, 页码: 221-231
作者:  
Basco, Sandor;  Cheng, Xinyue
收藏  |  浏览/下载:28/0  |  提交时间:2019/05/10
Projectively flat finsler metrics with almost isotropic s-curvature 期刊论文  iSwitch采集
Acta mathematica scientia, 2006, 卷号: 26, 期号: 2, 页码: 307-313
作者:  
Cheng, XY;  Shen, ZM
收藏  |  浏览/下载:20/0  |  提交时间:2019/05/10
Effect of compliant interface on the curvature and stress of micron-size film-substrate composite structure 会议论文  OAI收割
2006 IEEE International Conference on Robotics and Biomimetics, ROBIO 2006, Kunming, China, December 17, 2006 - December 20, 2006
作者:  
Liu Y;  Zhang Y(张吟)
收藏  |  浏览/下载:13/0  |  提交时间:2017/06/01
Recent progress on asphere manufacturing and testing at CIOM (EI CONFERENCE) 会议论文  OAI收割
Advanced Optical Manufacturing and Testing Technology 2000, November 1, 2000 - November 3, 2000, Chengdu, China
作者:  
Zhang X.;  Yu J.;  Zhang X.;  Zhang X.
收藏  |  浏览/下载:22/0  |  提交时间:2013/03/25
The manufacturing procedure of a 500 mm in diameter  f/2 hyperbolic primary mirror based on Computer-Controlled Polishing is introduced in detail. The mirror was finally polished to the shape accuracy of 13 nm rms and the surface roughness of 2 nm Ra. Testing methods and data analysis for different stages ranging from grinding to polishing are discussed. Some critical factors affecting the efficiency and accuracy of the grinding/polishing procedure are summarized. In addition  the preliminary work to make large off-axis asphere mirrors is presented. The difficulties in polishing and testing for both circular aperture and rectangular aperture mirrors are previewed  and a possible solution is given. To control the geometrical parameters such as radius of curvature and conic constant  a new profiler has been built  and it has proven very useful to improve the grinding efficiency. Finally  the manufacturing of small aspheres using deterministic grinding tool is also introduced. The fine grinding procedure of LOH's asphere grinding machine is presented.