中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
机构
采集方式
内容类型
发表日期
学科主题
筛选

浏览/检索结果: 共3条,第1-3条 帮助

条数/页: 排序方式:
A Powerful Method To Test Associations Between Ordinal Traits and Genotypes 期刊论文  OAI收割
G3-GENES GENOMES GENETICS, 2019, 卷号: 9, 期号: 8, 页码: 2573-2579
作者:  
Wang, Jinjuan;  Ding, Juan;  Huang, Shouyou;  Li, Qizhai;  Pan, Dongdong
  |  收藏  |  浏览/下载:66/0  |  提交时间:2020/01/10
On constrained m-estimation and its recursive analog in multivariate linear regression models 期刊论文  iSwitch采集
Statistica sinica, 2008, 卷号: 18, 期号: 2, 页码: 405-424
作者:  
Bai, Zhidong
收藏  |  浏览/下载:52/0  |  提交时间:2019/05/10
Self Imaging technique for refocusing an aerospace camera (EI CONFERENCE) 会议论文  OAI收割
ICO20: Optical Devices and Instruments, August 21, 2005 - August 26, 2005, Changchun, China
作者:  
Li W.;  Li W.;  Wang X.;  Wang X.;  Wang X.
收藏  |  浏览/下载:34/0  |  提交时间:2013/03/25
A novel auto-focusing technique using a self imaging approach is developed for an aerospace camera having large aperture and long focus. Its optical system consists of an emitting system  receiving system  and two penta-prisms. Emitting system has three parts: a light source  beamsplitter  and aim slit. The receiving system includes a field lens  two separate lenses  and CCD. Using two little penta-prisms instead of a large planar mirror makes the autofocus system simple and compact. CCD was used as photoelectric converting device. A defocused signal is acquired by measuring the change of the two slit self-images position imaged on the CCD. A simple and compact construction of the auto-focusing system was proposed. The algorithm to calculate the moving of the slit-self images position was analyzed in order to achieve subpixel position estimation. The results of the experiments show a 10m focusing precision. The system demonstrates high resolution  easy adjustment and high reliability.