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浏览/检索结果: 共11条，第1-10条 帮助

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Study on the precipitation mechanisms of TiC particles in steel matrix composites fabricated by eutectic solidification 期刊论文  OAI收割
MATERIALS RESEARCH EXPRESS, 2023, 卷号: 10, 期号: 2, 页码: 11
作者:  Huang, Long;  Liu, Jia;  Deng, Xiangtao;  Wang, Zhaodong
  |  收藏  |  浏览/下载：22/0  |  提交时间：2023/05/09
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：28/0  |  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  
Ultrastrong Coupling Few-Photon Scattering Theory 期刊论文  OAI收割
PHYSICAL REVIEW LETTERS, 2018, 卷号: 120, 期号: 15, 页码: 153602
作者:  Garcia-Ripoll, JJ;  Shi, T;  Chang, Y
  |  收藏  |  浏览/下载：27/0  |  提交时间：2018/12/27
A SEMISMOOTH NEWTON METHOD FOR SEMIDEFINITE PROGRAMS AND ITS APPLICATIONS IN ELECTRONIC STRUCTURE CALCULATIONS 期刊论文  OAI收割
SIAM JOURNAL ON SCIENTIFIC COMPUTING, 2018, 卷号: 40, 期号: 6, 页码: A4131-A4157
作者:  Li, Yongfeng;  Wen, Zaiwen;  Yang, Chao;  Yuan, Ya-Xiang
  |  收藏  |  浏览/下载：21/0  |  提交时间：2019/03/05
A fast inversion algorithm of formation resistivity for resistivity logging through casing 期刊论文  OAI收割
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2016, 卷号: 59, 期号: 6, 页码: 2326-2332
作者:  Liu Fu-Ping;  Wang An-Ling;  Liu Hua-Qun;  Yang Chang-Chun
  |  收藏  |  浏览/下载：17/0  |  提交时间：2017/11/22
Irradiance Spatial Non-Uniformity Correction in Large-Format Infrared Focal Plane Array Measurement 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging:Infrared Imaging and Applications, Beijing, 2013-06-25
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收藏  |  浏览/下载：11/0  |  提交时间：2014/11/11
The removal function of edge effect and amending with dwell time function (EI CONFERENCE) 会议论文  OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, April 26, 2010 - April 29, 2010, Dalian, China
作者:  Luo X.;  Zhang F.;  Zhang F.;  Wang X.-K.;  Zheng L.-G.
收藏  |  浏览/下载：37/0  |  提交时间：2013/03/25
Computer Controlled Optical Surfacing (CCOS) is widely used for making optical aspheric mirrors. In the practical fabrication  edge effect is an important problem which restricts the fabrication efficiency and accuracy seriously. In this paper  the edge effect is solved by working out the edge removal function and compensate with dwell time function. Skin Model is used to describe the pressure distribution when the tool hangs over the work-piece. The calculation model of edge removal function is derived from Skin Model theoretically. A removal function experiment is completed. The difference between the theoretical model and the experiment results is less than 5%. It means that the calculation model is suit for the practical fabrication. Than the dwell time is solved with edge effect compensation by matrix-based algorithm. In the end  actual experiment was done to validate the edge effect compensation method. 2010 Copyright SPIE - The International Society for Optical Engineering.  
Application of Computational Chemistry in Identification for Chiral Compounds 期刊论文  OAI收割
CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE, 2009, 卷号: 30, 期号: 10, 页码: 1907-1918
作者:  Ren Jie;  Zhu Hua-Jie
收藏  |  浏览/下载：34/0  |  提交时间：2012/04/05
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：29/0  |  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.  
Modification of the residual stress state in a SiCp/6061Al composite by low-temperature treatment 期刊论文  OAI收割
Composites Science and Technology, 1997, 卷号: 57, 期号: 2, 页码: 165-172
H. Li; J. B. Li; L. Z. Sun; Z. G. Wang
收藏  |  浏览/下载：19/0  |  提交时间：2012/04/14