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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Target detection method for small defects in ink area of planar glass element 会议论文  OAI收割
Beijing, China, 2019-07-07
作者:  
Qi, Wenbo;  Wang, Zhengzhou;  Wang, Li;  Tan, Meng;  Wei, Jitong
  |  收藏  |  浏览/下载:40/0  |  提交时间:2020/02/28
Recent advances in large-scale assembly of semiconducting inorganic nanowires and nanofibers for electronics, sensors and photovoltaics 期刊论文  OAI收割
CHEMICAL SOCIETY REVIEWS, 2012, 卷号: 41, 期号: 12, 页码: 4560
Long, YZ; Yu, M; Sun, B; Gu, CZ; Fan, ZY
收藏  |  浏览/下载:33/0  |  提交时间:2013/09/24
An improved two-dimensional entropy method for star trail tracing in deep sky (EI CONFERENCE) 会议论文  OAI收割
ICO20: Optical Information Processing, August 21, 2005 - August 26, 2005, Changchun, China
作者:  
Wang Y.-J.;  Yao Z.-J.
收藏  |  浏览/下载:32/0  |  提交时间:2013/03/25
The trace of star trail is an important component of deep sky detection. The stars are low contrast targets  and their self-rotation will make their brightness change in cycle. Above all  the trail trace is vulnerable to the block and disturbance of other stars. Traditional one-dimensional maximum entropy thresholding algorithm is vulnerable to the noise  and the calculation of two-dimensional entropy methods is too large and takes too much time. This paper proposes an improved two-dimensional entropy threshold algorithm. We use recursion iteration method to eliminate the redundancy calculation  and reduce the size of two-dimensional histogram based on the deep sky stars characteristic  such as low contrast  fuzziness and the centralized histogram. We also combine our algorithm with the space trail trace model to forecast the star trace. Experiments results show  when the star are blocked or they turn dark  the method still can well extrapolate the star trace. Our method improves the capability of trailing the ebb and small star  and increases the precision of tracing. It is also robust to the noise  so there is a good application foreground for the method.  
Study on color difference estimation method of medicine biochemical analysis (EI CONFERENCE) 会议论文  OAI收割
ICO20: Illumination, Radiation, and Color Technologies, August 21, 2005 - August 26, 2005, Changchun, China
作者:  
收藏  |  浏览/下载:33/0  |  提交时间:2013/03/25
The biochemical analysis in medicine is an important inspection and diagnosis method in hospital clinic. The biochemical analysis of urine is one important item. The Urine test paper shows corresponding color with different detection project or different illness degree. The color difference between the standard threshold and the test paper color of urine can be used to judge the illness degree  therefore  it can be used in hospital  so that further analysis and diagnosis to urine is gotten. The color is a three-dimensional physical variable concerning psychology  the estimation method of color difference in urine test can have better precision and facility than the conventional test method with one-dimensional reflectance  calibrating organization and family  while reflectance is one-dimensional variable  it can make an accurate diagnose. The digital camera is easy to take an image of urine test paper and is used to carry out the urine biochemical analysis conveniently. On the experiment  so its application prospect is extensive.  the color image of urine test paper is taken by popular color digital camera and saved in the computer which installs a simple color space conversion (RGB &rarr XYZ &rarr L*a*b*) and the calculation software. Test sample is graded according to intelligent detection of quantitative color. The images taken every time were saved in computer  and the whole illness process will be monitored. This method can also use in other medicine biochemical analyses that have relation with color. Experiment result shows that this test method is quick and accurate  
Simulation of the off-resonance effect in one-dimensional heteronuclear multiple quantum coherence spectroscopy 期刊论文  OAI收割
MEASUREMENT SCIENCE & TECHNOLOGY, 2000, 卷号: 11, 期号: 3, 页码: 201-204
作者:  
Du, F;  Zhou, ZF;  Miao, XJ;  Mao, XA
收藏  |  浏览/下载:21/0  |  提交时间:2015/12/01
Improved one-dimensional NMR detection of heteronuclear multiple quantum coherence involving the insensitive nucleus Se-77 as demonstrated by the compound C28H28O4Se4W2 期刊论文  OAI收割
MEASUREMENT SCIENCE & TECHNOLOGY, 1999, 卷号: 10, 期号: 3, 页码: 170-173
作者:  
Du, F;  Liu, ML
收藏  |  浏览/下载:22/0  |  提交时间:2015/12/01