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浏览/检索结果: 共26条，第1-10条 帮助

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Research of laser atmospheric propagation of large-aperture antenna measurement 会议论文  OAI收割
Xi'an, China, 2023-10-18
作者:  Zhang, Xuan;  Gao, Ming;  Wang, Hu;  Lin, Shangmin;  Jin, Yu
  |  收藏  |  浏览/下载：14/0  |  提交时间：2024/07/03
Analyzing the Effects of a Basin on Atmospheric Environment Relevant to Optical Turbulence 期刊论文  OAI收割
PHOTONICS, 2022, 卷号: 9
作者:  Xu, Manman;  Zhou, Liangping;  Shao, Shiyong;  Weng, Ningquan;  Liu, Qing
  |  收藏  |  浏览/下载：69/0  |  提交时间：2022/05/16
The Turbulent Structure of the Marine Atmospheric Boundary Layer during and before a Cold Front 期刊论文  OAI收割
JOURNAL OF THE ATMOSPHERIC SCIENCES, 2021, 卷号: 78, 期号: 3, 页码: 863-875
作者:  Huang, Jian
  |  收藏  |  浏览/下载：22/0  |  提交时间：2021/06/24
Numerical comparison of adaptive optics correction based on stochastic parallel gradient descent and phase conjugate in scintillation conditions 期刊论文  OAI收割
OPTIK, 2020, 卷号: 208
作者:  Ma, Huimin;  Liu, Haiqiu;  Zhang, Jinghui;  Zhang, Pengfei
  |  收藏  |  浏览/下载：20/0  |  提交时间：2020/11/26
Hot prominence spicules launched from turbulent cool solar prominences 期刊论文  OAI收割
ASTRONOMY & ASTROPHYSICS, 2019, 卷号: 627, 页码: 12
作者:  Chitta, L. P.;  Peter, H.;  Li, L.
  |  收藏  |  浏览/下载：8/0  |  提交时间：2020/03/10
Phase Offset Tracking for Free Space Digital Coherent Optical Communication System 期刊论文  OAI收割
APPLIED SCIENCES-BASEL, 2019, 卷号: 9, 期号: 5
作者:  Li, Hongwei;  Huang, Yongmei;  Wang, Qiang;  He, Dong;  Peng, Zhenming
  |  收藏  |  浏览/下载：23/0  |  提交时间：2021/05/06
Effect of atmospheric turbulence on entangled orbital angular momentum three-qubit state 期刊论文  OAI收割
CHINESE PHYSICS B, 2017, 卷号: 26, 期号: 6, 页码: 1-5
作者:  Yan, Xiang;  Zhang, Peng-Fei;  Zhang, Jing-Hui;  Feng, Xiao-Xing;  Qiao, Chun-Hong
收藏  |  浏览/下载：25/0  |  提交时间：2018/05/25
Simulations of large winds and wind shears induced by gravity wave breaking in the mesosphere and lower thermosphere (MLT) region 期刊论文  OAI收割
ANNALES GEOPHYSICAE, 2014, 卷号: 32, 期号: 5, 页码: 543-552
作者:  Liu, X.;  Xu, J.;  Liu, H. -L.;  Yue, J.;  Yuan, W.
收藏  |  浏览/下载：28/0  |  提交时间：2015/09/22
Physical layer design for free space optical communication (EI CONFERENCE) 会议论文  OAI收割
2012 International Conference on Control Engineering and Communication Technology, ICCECT 2012, December 7, 2012 - December 9, 2012, Shenyang, Liaoning, China
作者:  Wang H.;  Zhang Q.;  Guo J.;  Guo J.;  Wang H.
收藏  |  浏览/下载：30/0  |  提交时间：2013/03/25
A small size Free Space Optical Communication System is introduced  including the hardware and the hardware specified physical layer protocol. In detail  the rapid synchronization method to reduce the handshake bandwidth requirement is demonstrated. The hardware of the system includes the laser driver system  the signal amplifying and shaping system  the data interface system. The hardware specified physical layer protocol is used to interface the outer data  serialize and deserialize the data stream  check transmission errors and schedule the data transmission. The overall system is a FIFO-like system and the user can use it as if he's operating a FIFO. The system is designed mainly for terrestrial FSO link whose signal channel is the atmosphere. Due to the complex composition and activity of the atmosphere  this signal channel brings in great influence on the transmitting laser in it  for example  the absorption and scattering of the atmosphere molecules and aerosols  the scintillation of received laser power caused by the turbulence of the atmosphere  all of which results in a much higher Bit Error Rate (BER) of the communication system than wired communication systems leading to frequent resynchronization. In our system  the sampling clock is generated locally using multi-phase sampling technique rather than PLLbased clock recovery  which helps to rapid synchronization. 2012 IEEE.  
Astronomical image restoration through atmosphere turbulence by lucky imaging (EI CONFERENCE) 会议论文  OAI收割
3rd International Conference on Digital Image Processing, ICDIP 2011, April 15, 2011 - April 17, 2011, Chengdu, China
作者:  Zhao J.;  Wang J.;  Zhang S.
收藏  |  浏览/下载：27/0  |  提交时间：2013/03/25
In this paper  we develop a lucky imaging system to restore astronomical images through atmosphere turbulence. Our system takes very short exposures  on the order of the atmospheric coherence time. The rapidly changing turbulence leads to a very variable point spread function (PSF)  and the variability of the PSF leads to some frames having better quality than the rest. Only the best frames are selected  aligned and co-added to give a final image with much improved angular resolution. Our system mainly consists of five parts: preprocessing  frame selection  image registration  image reconstruction  and image enhancement. Our lucky imaging system has been successfully applied to restore the astronomical images taken by a 1.23m telescope. We have got clear images of moon surface and Jupiter  and our system can be demonstrated to greatly improve the imaging resolution through atmospheric turbulence. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).