中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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浏览/检索结果: 共7条,第1-7条 帮助

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The high-throughput bridge to the rapid evaluation of fatigue reliability of structural engineering materials 期刊论文  OAI收割
INTERNATIONAL JOURNAL OF FATIGUE, 2024, 卷号: 178, 页码: 12
作者:  
Luo, Y. W.;  Zhang, B.;  Song, Z. M.;  Luo, X. M.;  Zhang, G. P.
  |  收藏  |  浏览/下载:15/0  |  提交时间:2024/01/07
CEPC cost model study and circumference optimization 期刊论文  OAI收割
Journal of Instrumentation, 2022, 卷号: 17, 期号: 10, 页码: P10018
作者:  
Wang, Dou;  Gao, Jie;  Ruan, Manqi;  Li, Yuhui;  Xu, Haocheng
  |  收藏  |  浏览/下载:11/0  |  提交时间:2023/11/10
Elasto-plastic test of Q235 steel bending beam with cracking resistance 期刊论文  OAI收割
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL, 2013, 卷号: 20, 期号: 11, 页码: 57-66
作者:  
Wang LM;  Feng Y;  Chen FX;  Wang HY(汪海英);  Wang DX
收藏  |  浏览/下载:37/0  |  提交时间:2013/12/23
Mechanism of STED microscopy and analysis of the factors affecting resolution (EI CONFERENCE) 会议论文  OAI收割
6th International Symposium on Precision Engineering Measurements and Instrumentation, August 8, 2010 - August 11, 2010, Hangzhou, China
Yang P.; Ai H.
收藏  |  浏览/下载:23/0  |  提交时间:2013/03/25
Stimulated emission depletion (STED) microscopy exploits nonlinear saturable optical transition of fluorescent molecules  allowed to overcome Abbe's diffraction-limit and provides diffraction-unlimited resolution in far-field optical microscopy. We elaborate the mechanism of STED and the conditions of depletion. The formula of STED microcopy resolution is deduced through effective point spread function (E-PSF). The STED system resolution is mainly dominated by the quality of the fluorescence depletion patterns in the focal plane. The depletion pattern is mainly affected by STED beam intensity  polarization  phase plate  primary aberrations  STED pulse shape  pulse duration and delay time. In this paper  we found related models and simulate the relationship between the depletion patterns and the parameters  and put forward effective approach to enhance the system resolution. 2010 SPIE.  
Far-field focusing of laser beam based on digital image processing techniques (EI CONFERENCE) 会议论文  OAI收割
Optoelectronic Imaging and Multimedia Technology, October 18, 2010 - October 20, 2010, Beijing, China
作者:  
Zhao S.;  Tian Y.-Z.;  Liu L.-S.;  Guo J.;  Zhang H.-Y.
收藏  |  浏览/下载:27/0  |  提交时间:2013/03/25
In order to lead the laser beam transmit in the atmosphere convergently  an experiment of laser focus at the distance of 450m and 300m has been operated in the outdoor place. The actual manipulations are as follows: Firstly  the laser was collimated by a beam expander  then the near-parallel laser beam was transmitted with a Galileo telescope system  and the distance between the concave lens and the convex lens can be tuned through a precise displacement platform  so the focus of the system changed due to the tiny displacement of the concave lens. Secondly  the average power of the laser spot can be measured using power meter  the power is 47.67mW and the standard deviation is 0.67mW while the focal length is 450m. Thirdly  the energy distribution was found through the laser beam analyzer. The spot images were saved using the beam analyzer  then the saved image can be processed with Matlab software afterwards. The function named EDGE and Sobel operator was used in the pre-processing of the saved image  then method of median filter was used in the course of image de-noising and 53H filter was adopted in the signal analysis. The diameter of laser spot was obtained by the method above  the diameter is 5.56mm and the standard deviation is 0.24mm. The spot center excursion is 0.56mm  it is 10.43% of the total diameter of the laser spot. At last  the key factors of the energy dissipation in the focusing system can be summarized as follows: restriction of the diffraction limit  attenuation in the atmosphere  geometrical aberration of optical system  and the diffraction limit and the geometrical aberration are significant in the three factors above  so we can reduce the impact of the both factors during the design of optical system. The reliable referenced data of the system design can be acquired through the primary experiment research. 2010 SPIE.  
Search for axions from the Kuo-Sheng nuclear power reactor with a high-purity germanium detector 期刊论文  OAI收割
PHYSICAL REVIEW D, 2007, 卷号: 75, 期号: 5
作者:  
TEXONO Collaboration
收藏  |  浏览/下载:18/0  |  提交时间:2015/12/02
Simulation of beam-beam effects in BEPC 期刊论文  OAI收割
HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION, 2004, 卷号: 28, 期号: 10, 页码: 1116-1120
作者:  
Zhang Y(张源);  Zhang, Y
收藏  |  浏览/下载:11/0  |  提交时间:2016/06/29