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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Geometric Factor Correction Algorithm Based on Temperature and Humidity Profile Lidar 期刊论文  OAI收割
REMOTE SENSING, 2024, 卷号: 16
作者:  
Zhang, Bowen;  Fan, Guangqiang;  Zhang, Tianshu
  |  收藏  |  浏览/下载:7/0  |  提交时间:2024/11/20
Selection of Twin Variants in Dynamic Plastic Deformation of Pure Ti at Liquid Nitrogen Temperature 期刊论文  OAI收割
ACTA METALLURGICA SINICA, 2022, 卷号: 58, 期号: 9, 页码: 1141-1149
作者:  
Gao Dong;  Zhou Yu;  Yu Ze;  Sang Baoguang
  |  收藏  |  浏览/下载:39/0  |  提交时间:2022/09/16
The Determination of Aerosol Distribution by a No-Blind-Zone Scanning Lidar 期刊论文  OAI收割
REMOTE SENSING, 2020, 卷号: 12
作者:  
Wang, Jie;  Liu, Wenqing;  Liu, Cheng;  Zhang, Tianshu;  Liu, Jianguo
  |  收藏  |  浏览/下载:58/0  |  提交时间:2020/11/26
A geometric factor calculation method based on the isotropic f lux assumption 期刊论文  OAI收割
Chinese Physics C, 2013, 期号: 12, 页码: 84-89
作者:  
Zhao XY(赵小芸);  Wang HY(王焕玉);  Wu F(吴峰);  Meng XC(孟祥承);  Ma YQ(马宇倩)
收藏  |  浏览/下载:27/0  |  提交时间:2015/12/15
A geometric factor calculation method based on the isotropic flux assumption 期刊论文  OAI收割
CHINESE PHYSICS C, 2013, 卷号: 37, 期号: 12, 页码: 126201
作者:  
Zhao XY(赵小芸);  Wang HY(王焕玉);  Zhao, XY;  Wang, HY;  Wu, F
收藏  |  浏览/下载:95/0  |  提交时间:2016/04/08
A local feature based simplification method for animated mesh sequence (EI CONFERENCE) 会议论文  OAI收割
2010 2nd International Conference on Computer Engineering and Technology, ICCET 2010, April 16, 2010 - April 18, 2010, Chengdu, China
作者:  
Wang B.;  Wang B.;  Zhao J.;  Zhang S.
收藏  |  浏览/下载:23/0  |  提交时间:2013/03/25
Although animated meshes are frequently used in numerous domains  only few works have been proposed until now for simplifying such data. In this paper  we propose a new method for generating progressive animated models based on local feature analysis and deformation area preservation. We propose the use of solid angle and height value for a non-hyperbolic vertex to define the local feature parameter. This local factor is embedded to the vertex quadric error matrix when calculating the edge collapse cost. In order to preserve the areas with large deformation  we add deformation degree weight to the aggregated quadric errors when computing the unified edge contraction sequence. Finally  a mesh optimization process is proposed to further reduce the geometric distortion for each frame. Our approach is fast  easy to implement  and as a result good quality dynamic approximations with well-preserved fine details can be generated at any given frame. 2010 IEEE.  
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.