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浏览/检索结果: 共10条，第1-10条 帮助

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Rail Detection Based on LSD and the Least Square Curve Fitting 期刊论文  OAI收割
International Journal of Automation and Computing, 2021, 卷号: 18, 期号: 1, 页码: 85-95
作者:  Yun-Shui Zheng;  Yan-Wei Jin
  |  收藏  |  浏览/下载：25/0  |  提交时间：2021/02/23
Applications of differential barometric altimeter in ground cellular communication positioning network 期刊论文  OAI收割
IET SCIENCE MEASUREMENT & TECHNOLOGY, 2020, 卷号: 14, 期号: 3, 页码: 322-331
作者:  Hu, Zhengqun;  Zhang, Lirong;  Ji, Yuanfa
  |  收藏  |  浏览/下载：26/0  |  提交时间：2021/12/06
cellular radio  height measurement  measurement errors  Global Positioning System  altimeters  barometers  least squares approximations  Kalman filters  surface fitting  spread spectrum communication  compensation  matrix algebra  GPS  signal message structure  power spectrum  spread spectrum ranging signal  fitting parameters  least-square solution  calibration compensation  system noise variance matrix  measurement noise variance matrix  multibase station correction  height information correction calculation  DBA system  systematic performance  differential barometric altimeter  ground cellular communication positioning network  measurement datum distribution  altitude positioning error  Global Positioning System  differential barometric altimetry system  systematic implementation level  continuous altitude measurement  precise altitude measurement  DBA systematic implementation aspect  two dimensional curved surface fitting function  sensor measurement correction  filtering effect  Kalman filter  measuring station  multiBSs  navigation fusion  
Online correction method for the registration error between tsmftis detector and interferogram 期刊论文  OAI收割
Sensors (Switzerland), 2020, 卷号: 20, 期号: 4
作者:  Cao, Jun;  Yuan, Yan;  Su, Lijuan;  Zhu, Conghui;  Yan, Qiangqiang
  |  收藏  |  浏览/下载：104/0  |  提交时间：2020/03/12
The Method for Calculating Optical Target Center of Weak Contrast Collimating Image in Integrated Diagnosis System 会议论文  OAI收割
Xiamen, PEOPLES R CHINA, 2020-08-25
作者:  Wang, Zhengzhou;  Wang, Li;  Tan, Meng;  Chen, Yongquan;  Li, Gang
  |  收藏  |  浏览/下载：24/0  |  提交时间：2021/06/04
Soller slits automatic focusing method for multi-element fluorescence detector 期刊论文  OAI收割
NUCLEAR SCIENCE AND TECHNIQUES, 2016, 卷号: 27, 期号: 5, 页码: -
作者:  Yang, YY;  Gao, Q;  Gu, SQ;  Yu, HS;  Lu, RY
收藏  |  浏览/下载：35/0  |  提交时间：2017/03/02
Automatic calibration method of voxel size for cone-beam 3D-CT scanning system 期刊论文  OAI收割
CHINESE PHYSICS C, 2014, 卷号: 38, 期号: 4
作者:  Yang Min;  Wang Xiao-Long;  Liu Yi-Peng;  Meng Fan-Yong;  Li Xing-Dong
收藏  |  浏览/下载：39/0  |  提交时间：2014/05/06
Attitude determination of small, dim and high-speed targets based on multi-CMOS intersecting system (EI CONFERENCE) 会议论文  OAI收割
2nd International Conference on Information Science and Engineering, ICISE2010, December 4, 2010 - December 6, 2010, Hangzhou, China
作者:  Li M.;  Zhao L.;  Wang J.
收藏  |  浏览/下载：34/0  |  提交时间：2013/03/25
In order to measure attitude of small  dim and high-speed targets in shooting range  intersecting system based on multiple high-speed CMOS cameras was introduced in this paper. CMOS cameras were laid near from objects for small size  using multiple CMOS cameras to compose intersecting system for big number of targets tested  and selecting CMOS camera between CMOS and CCD for low cost and considering damage to measurement equipment of objects tested. Pitch angle and yaw angle were measured by extracting axle wire through image processing  image sequences were obtained from cameras laying on two sides. Velocity of objects was calculated by least square curve-fitting  acquiring coordinate of centroid on image received by CMOS camera laying below effective viewing field. One CMOS camera was laid on right ahead for measuring roll angle. Station mode introduced in this paper has virtue of low cost and free extending. 2010 IEEE.  
Study on the calculation and application for asphericity of rectangle off-axis aspherics (EI CONFERENCE) 会议论文  OAI收割
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, November 19, 2008 - November 21, 2008, Chengdu, China
作者:  Xuan B.;  Song S.-M.;  Xie J.-J.;  Xie J.-J.;  Zhang H.
收藏  |  浏览/下载：74/0  |  提交时间：2013/03/25
Asphericity which affects the manufacturing process and the grinding quantity is an important parameter of optical aspherics. In this paper  the approximation  the least square fitting  wavefront aberration  sag methods are given for the calculation of optical asphericity. The effects of different definitions of optical asphericity are analysed to optimize the process of manufacture. A sag method is presented to solve the best-fit sphere and asphericity for an off-aixs aspheric mirror with a rectangle aperture of 180mm145mm  and polishing quantity and distribution plots are given. The optical manufacturing and testing technology for different choices of best-fit spheres and asphericity are described and analyzed. Therefore  proper definition of optical asphericity which is useful to manufacturing is very important for optical fabrication and test. 2009 SPIE.  
Based on Householder transform of the Zernike polynomial wave front fitting method to solve active optics correction force (EI CONFERENCE) 会议论文  OAI收割
Infrared Materials, Devices, and Applications, November 12, 2007 - November 15, 2007, Beijing, China
作者:  Wu X.-X.
收藏  |  浏览/下载：27/0  |  提交时间：2013/03/25
Corrective force solving is a critical technology of the active optics. A method to solve active optics corrective force is introduced  which is based on Householder transform of Zernike polynomial wave front fitting  this method is different from the traditional least square method and Gram-Schmid orthogonal method  because it does not bring ill-conditioned polynomial without constructing normal equation  so it can avoid calculation error  wave front fitting is precision. Based on the coefficient of the Zernike polynomial and the response function of the each actuator  the stiffness matrix of the primary mirror is built  and then adopting the damp least square method to calculate corrective force. Based on this method  cp400m test mirror is simulated many times  the calculation result approve: if the Householder transform is adopted  wave front fitting is precision  the result is stabilization and corrective effectiveness is better.  
Time-resolved fluorescence spectroscopic studies on interaction mechanism of dansyl-L-serine with bridged-bicyclodextrins 期刊论文  OAI收割
CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE, 2005, 卷号: 26, 期号: 4, 页码: 693-696
作者:  Chen, K;  Jia, SY;  Hao, YQ;  Wu, LX;  Wu, YQ
  |  收藏  |  浏览/下载：17/0  |  提交时间：2019/04/09