中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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Effect of cloud-based information systems on the agile development of industrial business process management 期刊论文  OAI收割
JOURNAL OF MANAGEMENT & ORGANIZATION, 2022
作者:  
Wang, Jian;  Xu, Yi-Peng;  She, Chen
  |  收藏  |  浏览/下载:12/0  |  提交时间:2023/05/30
Changes in productivity, efficiency and technology of China's crop production under rural restructuring SCI/SSCI论文  OAI收割
2016
作者:  
Song W.;  Han, Z.;  Deng, X. Z.
  |  收藏  |  浏览/下载:37/0  |  提交时间:2017/11/09
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:23/0  |  提交时间:2014/12/24
Quantitative assessment of impacts of climate and economic-technical factors on grain yield in Jilin Province from 1980 to 2008 SCI/SSCI论文  OAI收割
2011
作者:  
Yang F.
收藏  |  浏览/下载:16/0  |  提交时间:2012/06/08
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:39/0  |  提交时间:2012/06/08
Active pixel sensor geometrical characteristic effects on star image subdivided locating accuracy for star tracker (EI CONFERENCE) 会议论文  OAI收割
ICO20: Remote Sensing and Infrared Devices and Systems, August 21, 2005 - August 26, 2005, Changchun, China
作者:  
Liu J.;  Liu J.;  Liu J.;  Li J.;  Li J.
收藏  |  浏览/下载:26/0  |  提交时间:2013/03/25
Active pixel sensor (APS) star tracker becomes an investigated hotspot because of its technical advantages. And centroid algorithm is a subpixel method proper to star position calculation because of its high accuracy and simplicity. When centroid algorithm is applied on APS star tracker  APS pixel geometrical characteristics might effect on star image position accuracy. Because the amplifier circuit and other function circuits inter pixel of APS take up some pixel area  the Fill Factor is less than 100%. Moreover  the active sensitive area has a certain geometrical shape  such as square  rectangle and L shape. The Fill Factor of pixel influences on star image subdivided locating accuracy when using centioid algorithm. In this paper  we have analyzed all pixel geometrical characteristics influence on the star position accuracy. From simulation experiments  we can conclude that Fill factor and pixel geometric shape influence on star position accuracy. The star locating error increased when Fill Factor decreased  and different geometrical shape of active sensitive area of pixel can make different influence on star location accuracy  the symmetrical sensitive area in x or y axis have symmetrical location error in the same axis.