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浏览/检索结果: 共16条，第1-10条 帮助

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A comprehensive assessment indicator of the water-energy-food nexus system based on the material consumption relationship 期刊论文  OAI收割
JOURNAL OF HYDROLOGY, 2024, 卷号: 633, 页码: 15
作者:  Hao, Lingang;  Yu, Jingjie;  Wang, Ping;  Han, Chunhui;  Gojenko, Boris
  |  收藏  |  浏览/下载：29/0  |  提交时间：2024/05/20
Quantifying spatiotemporal dynamics of urban building and material metabolism by combining a random forest model and GIS-based material flow analysis 期刊论文  OAI收割
FRONTIERS IN EARTH SCIENCE, 2022, 卷号: 10, 页码: 13
作者:  Mao, Ting;  Liu, Yupeng;  Chen, Wei-Qiang;  Li, Nan;  Dong, Nan
  |  收藏  |  浏览/下载：21/0  |  提交时间：2023/02/24
Experimental Study on Fusion Neutron Activation of Metal Materials in EAST 期刊论文  OAI收割
IEEE TRANSACTIONS ON PLASMA SCIENCE, 2021, 卷号: 49
作者:  Zhang, Ruixue;  Hong, Bing;  Hu, Liqun;  Li, Kai;  Zhong, Guoqiang
  |  收藏  |  浏览/下载：40/0  |  提交时间：2021/06/15
Experimental investigation on electrical discharge diamond grinding of RB-SiC ceramics 期刊论文  OAI收割
International Journal of Advanced Manufacturing Technology, 2018, 卷号: 94, 期号: 2019-05-08, 页码: 2751-2762
作者:  Rao, X. S.;  Zhang, F. H.;  Li, C.;  Li, Y. J.
  |  收藏  |  浏览/下载：50/0  |  提交时间：2019/09/17
Formation Mechanism and In Vitro Evaluation of Risperidone-Containing PLGA Microspheres Fabricated by Ultrafine Particle Processing System 期刊论文  OAI收割
JOURNAL OF PHARMACEUTICAL SCIENCES, 2017, 卷号: 106, 期号: 11, 页码: 3363-3371
作者:  Huang, Zhengwei;  Chen, Xiaona;  Fu, Han;  Wen, Xinguo;  Ma, Cheng
  |  收藏  |  浏览/下载：109/0  |  提交时间：2019/01/08
Carbonized textile with free-standing threads as an efficient anode material for bioelectrochemical systems 期刊论文  OAI收割
JOURNAL OF POWER SOURCES, 2015, 卷号: 287, 页码: 269-275
作者:  Wang, Zejie;  Zheng, Zhiyong;  Zheng, Suqi;  Chen, Shuiliang;  Zhao, Feng
收藏  |  浏览/下载：34/0  |  提交时间：2015/11/02
A dead-end filtration method to remove particle-associated pathogens in aquaculture systems 期刊论文  OAI收割
AQUACULTURE INTERNATIONAL, 2012, 卷号: 20, 期号: 4, 页码: 657-672
作者:  Fu, Songzhe;  Shen, Jiazheng;  Chen, Kang;  Tu, Junling;  Liu, Ying
收藏  |  浏览/下载：43/0  |  提交时间：2013/09/24
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：62/0  |  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.  
Brazing RB-SiC used in large aperture space optical system (EI CONFERENCE) 会议论文  OAI收割
2011 International Conference on Materials and Products Manufacturing Technology, ICMPMT 2011, October 28, 2011 - October 30, 2011, Chengdu, China
Zhang B.; Zhang Z.
收藏  |  浏览/下载：24/0  |  提交时间：2013/03/25
Because of the sic material's superior optical characteristic  machine characteristic and hot characteristic  it becomes currently the space big aperture reflector choose firstly1. For larger aperture sic mirror  it is not economical and safe to make the monolithic body directly 2  3. The SiC mirror brazed assembly with several segments can solve these problems. In this paper  one 600 mm sic plane mirror as demonstration welded with 3 radial segments is roughly grinded to the required figure at first  then the mirror is finely grinded and polished by the technology of CCOS  the mirror figure error is less than 1/20 ( = 632.8nm) in RMS finally. The problems of the preferential removal near braze joint are solved. The methods of reducing the residual stress of mirror are discussed. At last  some measurements and experiments are carried on  and the results conclude that the brazed SiC mirror can meet the requirement of large aperture optical systems. (2011) Trans Tech Publications.  
Research on the micro-crack density of a chromium coating/steel substrate with and without laser pre-quenching treatment 会议论文  OAI收割
2011 1st International Conference on High Performance Structures and Materials Engineering, ICHPSM 2011, Beijing, China, MAY 05-06, 2011
作者:  Yang BQ(杨班权);  Chen GN(陈光南);  Chen XJ(陈学军)
收藏  |  浏览/下载：26/0  |  提交时间：2013/02/26