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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A Relational Theory of Locality 期刊论文  OAI收割
ACM TRANSACTIONS ON ARCHITECTURE AND CODE OPTIMIZATION, 2019, 卷号: 16, 期号: 3, 页码: 26
作者:  
Yuan, Liang;  Ding, Chen;  Smith, Wesley;  Denning, Peter;  Zhang, Yunquan
  |  收藏  |  浏览/下载:22/0  |  提交时间:2020/12/10
Heritability estimates of spatial working memory and set-shifting in a healthy Chinese twin sample: A preliminary study 期刊论文  OAI收割
PSYCH JOURNAL, 2018, 卷号: 7, 期号: 3, 页码: 144-151
作者:  
Zhou, Han-yu;  Li, Zhi;  Xie, Dong-jie;  Xu, Ting;  Cheung, Eric E. F.
  |  收藏  |  浏览/下载:43/0  |  提交时间:2018/10/08
An improved SMO algorithm for financial credit risk assessment - Evidence from China's banking 期刊论文  OAI收割
NEUROCOMPUTING, 2018, 卷号: 272, 页码: 314-325
作者:  
Zhang, Qi;  Wang, Jue;  Lu, Aiguo;  Wang, Shouyang;  Ma, Jian
  |  收藏  |  浏览/下载:32/0  |  提交时间:2018/07/30
In situ long trace profiler for measurement of Wolter type-I mirror (EI CONFERENCE) 会议论文  OAI收割
Advances in Metrology for X-Ray and EUV Optics III, August 1, 2010 - August 2, 2010, San Diego, CA, United states
作者:  
Chen B.;  Chen B.
收藏  |  浏览/下载:27/0  |  提交时间:2013/03/25
The surface profile of Wolter type-I mirror has a great impact on the performance of Solar X-ray Telescope. According to the existing fabrication instrument and experimental conditions in our lab  an in situ Long Trace Profiler is developed and set up on the fabrication instrument in order to measure the surface profile of Wolter mirror in real time during fabrication process. Its working mechanism  structural parameters and data processing algorithm are investigated. The prototype calibrated by a standard plane mirror is used to measure a sample of Wolter type-I mirror. The results show that our prototype can achieve an accuracy of 2.6rad rms for slope error with a stability of 1.33rad during the whole measurement period. This can meet further fabrication requirements. 2010 Copyright SPIE - The International Society for Optical Engineering.  
1D-KBA microscope using double-periodic multilayer (EI CONFERENCE) 会议论文  OAI收割
Advances in X-Ray/EUV Optics and Components IV, August 3, 2009 - August 5, 2009, San Diego, CA, United states
作者:  
Wang Z.;  Wang X.;  Wang X.;  Wang X.;  Wang Z.
收藏  |  浏览/下载:12/0  |  提交时间:2013/03/25
To study the action of shock wave in CH target  one-dimensional grazing incidence KBA microscope for 4.75keV energy was set up. Because of strong absorption in air  4.75keV energy microscope can just work in vacuum. Accordingly  the alignment and assemblage will be very complicated and difficult. A special multilayer method  using double periodic multilayer  was proposed to solve this problem. This multilayer has high reflectivity not only for 4.75keV X-rays but also for 8keV X-rays at the same grazing incidence angle. It means 1D-KBA microscope has the same light trace for different working energies. Therefore  we can implement the alignment and assembly of 4.75keV system by the help of 8keV X-rays. Because 8keV X-rays is very easy produced by X-ray tube and has strong transmittability in air  the alignment and assemblage process became relatively easy. By now  we have finished the alignment experiment at 8keV and obtained imaging results. The performance is about 2-3m resolution in 250m field of view. It is coincide with the calculation. 2009 SPIE.  
Space camera imaging gain in-orbit adjusting strategy (EI CONFERENCE) 会议论文  OAI收割
2009 2nd International Conference on Intelligent Computing Technology and Automation, ICICTA 2009, October 10, 2009 - October 11, 2009, Changsha, Hunan, China
作者:  
Wang J.;  He X.
收藏  |  浏览/下载:17/0  |  提交时间:2013/03/25
A Multi-Step Gain Adjusting Strategy (MSGAS) of space camera was proposed  which was used to get higher SNR (Signal-Noise Rate) image. When the space camera working in poor light condition  the CCD signal was so weak that it's difficult to get a clear image  to reduce the quantization noise and improve the SNR  we must amplify the CCD signal first and then quantize. The MSGAS was achieved by adjusting the gain of the CCD (Charge Couple Device) signal processor step by step  the upper limit and lower limit were set  if the MDN (Mean Digital Number) of a fixed length image data was not between the lower and upper limit  the gain was adjusted step by step. In the experiment  the upper limit  lower limit and the step were set  and the result of the experiment showed that MSGAS was robust and SNR was improved from 28 to 39. 2009 IEEE.  
Study on chroma balance based on grating spectrometer for LED (EI CONFERENCE) 会议论文  OAI收割
Light-Emitting Diode Materials and Devices II, November 12, 2007 - November 14, 2007, Beijing, China
作者:  
Meng Z.;  Meng Z.
收藏  |  浏览/下载:23/0  |  提交时间:2013/03/25
A standard white light compounding algorithm based on combination of choma coordinates acquisition system with computer working current control system is presented for three-color LED. The chroma coordinates acquisition system consist of grating spectrometer and integrating sphere. The computer adjust and control the working current of three-color LED  then achieved chroma coordinates error between the compounded white light and standard white light D65  until the chroma coordinates is less than the threshold beforehand set by this technique. The compounded white light meet the chroma error demanded that is able to be changed  at the same time the chroma coordinates acquisition system and the working current control system are eliminated. The proposed algorithm the offset of central wavelength and the change of chroma coordinates due to working current variety for LEDs. Experimental results show that the proposed algorithm achieved lesser chroma error uv=0.001 relative to standard white light D65  enhanced chroma uniformity of illumination field.