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浏览/检索结果: 共8条，第1-8条 帮助

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Tribological behavior of h-BN/Al2O3 self-lubricating composites in extreme environments–Part I: Lubricating behavior and ultra-low friction coefficient mechanism in air environments from room temper 期刊论文  OAI收割
Tribology International, 2024, 期号: 201, 页码: 110251
作者:  Song JJ(宋俊杰)
  |  收藏  |  浏览/下载：3/0  |  提交时间：2024/12/20
Absence of magnetic order in dichloro [1,2-bis (diphenylphosphino) ethane] nickel(2+) single crystal* 期刊论文  OAI收割
CHINESE PHYSICS B, 2021, 卷号: 30
作者:  Ma, Shuaiqi;  An, Linlin;  Zhu, Xiangde
  |  收藏  |  浏览/下载：22/0  |  提交时间：2021/05/31
水泥厂烟气中温选择性催化还原技术中试研究 期刊论文  OAI收割
环境污染与防治, 2020, 卷号: 42, 期号: 12, 页码: 1553
作者:  郭旸旸;  王东书;  罗雷;  李晶;  母佰龙
  |  收藏  |  浏览/下载：23/0  |  提交时间：2021/03/29
Coexisting carbonate-bearing eclogite and blueschist in SW Tianshan, China: Petrology and phase equilibria 期刊论文  OAI收割
JOURNAL OF ASIAN EARTH SCIENCES, 2012, 卷号: 60, 页码: 174-187
作者:  Li, Ji-Lei;  Klemd, Reiner;  Gao, Jun;  Meyer, Melanie
  |  收藏  |  浏览/下载：11/0  |  提交时间：2018/09/26
Nonlinear Disturbance to Large Optical Antarctic Telescope 会议论文  OAI收割
Amsterdam, Netherlands, 2012-7-1
作者:  Shihai Yang
收藏  |  浏览/下载：21/0  |  提交时间：2014/01/11
Study on ultra-light secondary baffle for coaxial two-mirror telescope (EI CONFERENCE) 会议论文  OAI收割
2012 9th IEEE International Conference on Mechatronics and Automation, ICMA 2012, August 5, 2012 - August 8, 2012, Chengdu, China
作者:  Zhang L.;  Zhang L.
收藏  |  浏览/下载：61/0  |  提交时间：2013/03/25
The coaxial two-mirror telescope consists of two mirrors facing each other. Classical two-mirror arrangements are Gregorian and Cassegrain. These systems are usually applied to space telescopes and often have optical baffles to prevent stray light from entering the focal plane. The optical baffles consist of concentric rings suspended between the secondary and the primary mirror. The secondary baffle for a large two-mirror optical system is designed and analyzed in this paper. According to mission of a telescope  the structure should have high stiffness and high reliability and light weight. Compared with invar  aluminum alloy and titanium alloy  carbon fiber composite is currently the best material in terms of weight-to-strength ratio. It also has advantages of high temperature tolerance and low thermal expansion. So carbon fiber composite is chosen as material to meet requirements of the coaxial telescope. In this paper  optimization method based on finite element analysis (FEA) is used for design the secondary baffle. Minimum weight of the baffle is chosen as an objective function. Thicknesses of former tube and vanes are chosen as variables. Analysis results show that the designed secondary baffle has maximum diameter of 180mm  total length of 120mm and weighs 142g. And its fundamental frequency reaches 651Hz. Therefore the baffle has many advantages  such as ultra-light weight  high stiffness and dimensional stability  etc. The optimization method and the baffle design can be helpful to other coaxial telescopes  such as Cassegrain  Gregorian and their subdivisions. 2012 IEEE.  
Microstructures and Mechanical Properties of As-Cast and Hot-Rolled Mg-8.43Li-0.353Ymm (Y-riched mischmetch) Alloy 期刊论文  OAI收割
metallurgical and materials transactions a-physical metallurgy and materials science, 2012, 卷号: 43a, 期号: 2, 页码: 709-715
Dong HW; Xu SW; Wang LD; Kamado S; Wang LM
收藏  |  浏览/下载：31/0  |  提交时间：2013/06/08
Oxidation behavior of Ti3AlC2 at 1000-1400 degrees C in air 期刊论文  OAI收割
Corrosion Science, 2003, 卷号: 45, 期号: 5, 页码: 891-907
X. H. Wang; Y. C. Zhou
收藏  |  浏览/下载：26/0  |  提交时间：2012/04/14