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浏览/检索结果: 共19条，第1-10条 帮助

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Resolution of ideals associated to subspace arrangements 期刊论文  OAI收割
ALGEBRA & NUMBER THEORY, 2022, 卷号: 16, 期号: 5, 页码: 1120-1140
作者:  Conca, Aldo;  Tsakiris, Manolis C.
  |  收藏  |  浏览/下载：17/0  |  提交时间：2023/02/07
Living With Parents-In-Law Increased the Risk of Postpartum Depression in Chinese Women 期刊论文  OAI收割
FRONTIERS IN PSYCHIATRY, 2021, 卷号: 12, 页码: 8
作者:  Peng, Songxu;  Lai, Xin;  Qiu, Jun;  Du, Yukai;  Yang, Jing
  |  收藏  |  浏览/下载：70/0  |  提交时间：2022/02/11
Modular arrangements of sequence motifs determine the functional diversity of KDM proteins 期刊论文  OAI收割
BRIEFINGS IN BIOINFORMATICS, 2021, 卷号: 22, 期号: 3
作者:  Wang, Zerong;  Liu, Dongyang;  Xu, Baofang;  Tian, Ruixia;  Zuo, Yongchun
  |  收藏  |  浏览/下载：7/0  |  提交时间：2023/02/24
Complete Classification and Efficient Determination of Arrangements Formed by Two Ellipsoids 期刊论文  OAI收割
ACM TRANSACTIONS ON GRAPHICS, 2020, 卷号: 39, 期号: 3, 页码: 12
作者:  Jia, Xiaohong;  Tu, Changhe;  Mourrain, Bernard;  Wang, Wenping
  |  收藏  |  浏览/下载：20/0  |  提交时间：2021/01/14
Supporting farmer-managed irrigation systems in the Shigar valley, Karakorum: Role of the government and Aga Khan Rural Support Programme 期刊论文  OAI收割
Journal of Mountain Science, 2017, 卷号: 14, 期号: 10, 页码: 2064-2081
作者:  Joseph K. W. HILL
  |  收藏  |  浏览/下载：29/0  |  提交时间：2017/10/09
On products in a real moment-angle manifold 期刊论文  OAI收割
JOURNAL OF THE MATHEMATICAL SOCIETY OF JAPAN, 2017, 卷号: 69, 期号: 2, 页码: 503-528
作者:  Cai, Li
  |  收藏  |  浏览/下载：18/0  |  提交时间：2018/07/30
Numerical Study of the Effect of Nozzle Configurations on Characteristics of MILD Combustion for Gas Turbine Application 期刊论文  OAI收割
JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME, 2016, 卷号: 138, 期号: 4
作者:  Deng, Xiaowen;  Xiong, Yan;  Yin, Hong;  Gao, Qingshui
收藏  |  浏览/下载：37/0  |  提交时间：2016/10/17
Advanced astigmatism-corrected tandem Wadsworth mounting for small-scale spectral broadband imaging spectrometer (EI CONFERENCE) 会议论文  OAI收割
作者:  Lin G.-Y.
收藏  |  浏览/下载：35/0  |  提交时间：2013/03/25
Tandem gratings of double-dispersion mount make it possible to design an imaging spectrometer for the weak light observation with high spatial resolution  high spectral resolution  and high optical transmission efficiency. The traditional tandem Wadsworth mounting is originally designed to match the coaxial telescope and large-scale imaging spectrometer. When it is used to connect the off-axis telescope such as off-axis parabolic mirror  it presents lower imaging quality than to connect the coaxial telescope. It may also introduce interference among the detector and the optical elements as it is applied to the short focal length and small-scale spectrometer in a close volume by satellite. An advanced tandem Wadsworth mounting has been investigated to deal with the situation. The Wadsworth astigmatism-corrected mounting condition for which is expressed as the distance between the second concave grating and the imaging plane is calculated. Then the optimum arrangement for the first plane grating and the second concave grating  which make the anterior Wadsworth condition fulfilling each wavelength  is analyzed by the geometric and first order differential calculation. These two arrangements comprise the advanced Wadsworth mounting condition. The spectral resolution has also been calculated by these conditions. An example designed by the optimum theory proves that the advanced tandem Wadsworth mounting performs excellently in spectral broadband. 2012 Optical Society of America.  
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：60/0  |  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.  
Formation mechanisms of cyclic saturation dislocation patterns in 001 , 011 and (1)over-bar 1 1 copper single crystals 期刊论文  OAI收割
Acta Materialia, 2010, 卷号: 58, 期号: 9, 页码: 3281-3294
P. Li; S. X. Li; Z. G. Wang; Z. F. Zhang
收藏  |  浏览/下载：16/0  |  提交时间：2012/04/13