中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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Collision time of a triatomic chemical reaction A plus BC 期刊论文  OAI收割
canadian journal of chemistry, 2015, 卷号: 93, 期号: 6, 页码: 607-614
作者:  
He, Xiaohu;  Chao (Wu), Victor Wei-Keh;  Han, Keli;  Hao, Ce;  Zhang, Yan
收藏  |  浏览/下载:26/0  |  提交时间:2015/11/17
The evolution of productivity performance on China's dairy farms in the new millennium SCI/SSCI论文  OAI收割
2012
Ma H.; Oxley L.; Rae A.; Fan C.; Huang J.; Rozellell S.
收藏  |  浏览/下载:29/0  |  提交时间:2014/12/24
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:30/0  |  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.  
Qualitative determination of the components of textile products using near infrared spectroscopy (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photonics and Optoelectronics, SOPO 2010, June 19, 2010 - June 21, 2010, Chengdu, China
作者:  
Chen X.;  Chen X.;  Chen X.;  Wang D.
收藏  |  浏览/下载:32/0  |  提交时间:2013/03/25
In the paper  A total of 40 pure or two-mixed textile weaves were prepared and classification of these samples was introduced using near infrared spectroscopy (NIRS)  all textile samples are selected among four classes  which are Cotton-Terylene  Cotton-Polyurethane  Cotton and Terylene  according to theirs components. Near infrared diffuse reflectance spectra of the samples were collected  Mahalanobis distance was used to discriminate the samples coupled with principle components analysis (PCA)  the results showed that near infrared spectroscopy could determine which class one textile weave belongs to easily comparing with traditional methods. In addition  the expectation of the further research on qualitative determination of textile products by NIR technology was discussed in the end of this paper. 2010 IEEE.  
Study on the communication from the households in the countries of west China Based on the rural telecom communication charge 会议论文  OAI收割
International Conference on Challenges in Environmental Science and Computer Engineering, CESCE, Wuhan, China, 2010
Wang; Boli1; 2; Zhang; Xiaolei1; Zhu; Bing1; Sun; Changlong1
收藏  |  浏览/下载:41/0  |  提交时间:2011/08/23
Summary of agriculture of Zigong district in China SCI/SSCI论文  OAI收割
2007
Ma H. Y.; Rae A. N.; Huang J.; Rozelle S.
收藏  |  浏览/下载:45/0  |  提交时间:2012/06/08
Analysis of the amino acid effect on protein folding by atom pair contacts 期刊论文  OAI收割
POLYMER, 2004, 卷号: 45, 期号: 2, 页码: 609-621
作者:  
Jiang, ZT;  Zhang, LX;  Chen, J;  Xia, A;  Zhao, DL
  |  收藏  |  浏览/下载:28/0  |  提交时间:2019/04/09