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浏览/检索结果: 共11条，第1-10条 帮助

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Extending light-front holographic QCD using the 't Hooft Equation 期刊论文  OAI收割
PHYSICS LETTERS B, 2021, 卷号: 823, 页码: 5
作者:  Ahmady, Mohammad;  Dahiya, Harleen;  Kaur, Satvir;  Mondal, Chandan;  Sandapen, Ruben
  |  收藏  |  浏览/下载：29/0  |  提交时间：2021/12/13
Nucleon electroweak form factors using spin-improved holographic light-front wavefunctions 期刊论文  OAI收割
NUCLEAR PHYSICS A, 2021, 卷号: 1016, 页码: 16
作者:  Ahmady, Mohammad;  Chakrabarti, Dipankar;  Mondal, Chandan;  Sandapen, Ruben
  |  收藏  |  浏览/下载：30/0  |  提交时间：2021/12/08
Pion-nucleus induced Drell-Yan cross section in models inspired by light-front holography 期刊论文  OAI收割
PHYSICS LETTERS B, 2020, 卷号: 807, 页码: 6
作者:  Lan, Jiangshan;  Mondal, Chandan
  |  收藏  |  浏览/下载：61/0  |  提交时间：2021/12/15
Deuteron electromagnetic form factors with the light-front approach 期刊论文  OAI收割
CHINESE PHYSICS C中国物理. C, 2017, 卷号: 41, 期号: 1, 页码: 13102
作者:  Dong YB(董宇兵);  Sun BD(孙保东);  Dong, YB;  Sun, BD
  |  收藏  |  浏览/下载：22/0  |  提交时间：2019/08/27
Deuteron electromagnetic form factors with the light-front approach 期刊论文  iSwitch采集
Chinese physics c, 2017, 卷号: 41, 期号: 1, 页码: 9
作者:  Sun, Bao-dong;  Dong, Yu-bing
收藏  |  浏览/下载：22/0  |  提交时间：2019/04/23
Heavy quarkonium in a holographic basis 期刊论文  OAI收割
PHYSICS LETTERS B, 2016, 卷号: 758, 页码: 118-124
作者:  Li, Yang;  Maris, Pieter;  Zhao, Xingbo;  Vary, James P.
  |  收藏  |  浏览/下载：33/0  |  提交时间：2018/05/31
Thermal mass spectra of vector and axial-vector mesons in predictive soft-wall AdS/QCD model 期刊论文  OAI收割
JOURNAL OF HIGH ENERGY PHYSICS, 2012, 期号: 4, 页码: 144
作者:  Wu, YL
收藏  |  浏览/下载：9/0  |  提交时间：2014/04/25
Predictive AdS/QCD model for mass spectra of mesons with three flavors 期刊论文  OAI收割
PHYSICAL REVIEW D, 2011, 卷号: 83, 期号: 6, 页码: 65030
作者:  Wu, YL;  Yang, YB
收藏  |  浏览/下载：15/0  |  提交时间：2013/05/17
Effect of gimbal point displacement on optical axis pointing precision in an image seeker (EI CONFERENCE) 会议论文  OAI收割
2011 International Conference on Electric Information and Control Engineering, ICEICE 2011, April 15, 2011 - April 17, 2011, Wuhan, China
作者:  Zhang X.;  Zhang X.;  Zhang X.
收藏  |  浏览/下载：39/0  |  提交时间：2013/03/25
A concentric glass spherical dome was usually chosen as the transparent window mounted in front of the optical lens in an image seeker. However  optical ray had to change its direction when propagating through the dome due to refraction unless passing through the center of the dome  which demanded gimbal point coincide with the center of the dome exactly. In fact  gimbal point displacement could not be eliminating due to fabrication  assembly and vibration  therefore the optical axis pointing error generated. In this paper  the effect of gimbal point displacement on optical axis pointing precision in an image seeker was analyzed  and the theoretical expression of the optical axis pointing error was derived based on geometric optics  and the error dynamics was explored by numerical. Take a visible light image seeker as a case  the thickness of concentric glass spherical dome was 8mm and the inner radius was 72mm  and the optical axis pointing errors varying dynamically with the look angle and the gimbal point displacement were shown in graph. When the gimbal displacement was 0.11mm  the maximum optical axis pointing error was 0.054mrad that is equal to the instantaneous field of view (IFOV) corresponding to the camera system whose focal length was 120mm and pixel size was 6.5m. Furthermore  with the gimbal displacement increasing  the optical axis pointing error increased linearly. The analyzed results provided a theoretical basis for the displacement range  which had to be limited strictly in the gimbal design process. 2011 IEEE.  
Design and image restoration research of a cubic-phase-plate system (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:  Zhang J.;  Zhang J.;  Zhang J.;  Shi G.;  Zhang X.
收藏  |  浏览/下载：25/0  |  提交时间：2013/03/25
Wave-front coding technology is a novel jointly optical and digital imaging technology which can greatly extend the depth of focus of optical systems. The image restoration process is an important part of wave-front coding technology. Using wave-front coding makes the modulation transfer function(MTF) values of the optical systems change little over a range of several times the depth of focus  which means the system MTF is quite insensitive to defocus  and there is no zero in the passband. So we can design a single filter for the restoration of images in different defocus positions. However  it's hard to avoid noise during image acquisition and transmission processes. These noises will be amplified in the image restoration  especially in the high frequency part when the MTF drop is relatively low. The restoration process significantly reduces the system signal to noise ratio this way. Aimed at the problem of noise amplification  a new algorithm was proposed which incorporated wavelet denoising into the iterative steps of Lucy-Richardson algorithm. Better restoration results were obtained through the new algorithm  effectively solving the noise amplification problem of original LR algorithm. Two sets of identical triplet imaging systems were designed  in one of which the cubic-phase-plate was added. Imaging experiments of the manufactured systems were carried  and the images of a traditional system and a wave-front coded system before and after decoding were compared. The results show that the designed wave-front coded system can extend the depth of focus by 40 times compared with the traditional system while maintaining the light flux and the image plane resolution. 2010 Copyright SPIE - The International Society for Optical Engineering.