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浏览/检索结果: 共13条，第1-10条 帮助

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Anti-slide pile structure development: New design concept and novel structure 期刊论文  OAI收割
FRONTIERS IN EARTH SCIENCE, 2023, 卷号: 11, 期号: -, 页码: -
作者:  Chen, Guangfu;  Guo, Fei;  Zhang, Guodong;  Liu, Jie;  Ding, Lijuan
  |  收藏  |  浏览/下载：11/0  |  提交时间：2023/08/02
Orbit design for space atom-interferometer AIGSO 期刊论文  OAI收割
INTERNATIONAL JOURNAL OF MODERN PHYSICS D, 2020, 卷号: 29, 期号: 4, 页码: 14
作者:  Wang, Gang;  Gao, Dongfeng;  Ni, Wei-Tou;  Wang, Jin;  Zhan, Mingsheng
  |  收藏  |  浏览/下载：20/0  |  提交时间：2021/12/06
Orbit design for space atom-interferometer AIGSO 期刊论文  OAI收割
INTERNATIONAL JOURNAL OF MODERN PHYSICS D, 2020, 卷号: 29, 期号: 4, 页码: 14
作者:  Wang, Gang;  Gao, Dongfeng;  Ni, Wei-Tou;  Wang, Jin;  Zhan, Mingsheng
  |  收藏  |  浏览/下载：20/0  |  提交时间：2021/12/06
Concept Design of the "Guanlan" Science Mission: China's Novel Contribution to Space Oceanography 期刊论文  OAI收割
FRONTIERS IN MARINE SCIENCE, 2019, 卷号: 6, 页码: 14
作者:  Chen, Ge;  Tang, Junwu;  Zhao, Chaofang;  Wu, Songhua;  Yu, Fangjie
  |  收藏  |  浏览/下载：92/0  |  提交时间：2019/08/28
Concept Design of the "Guanlan" Science Mission: China's Novel Contribution to Space Oceanography 期刊论文  OAI收割
FRONTIERS IN MARINE SCIENCE, 2019, 卷号: 6, 页码: UNSP 194
作者:  Chen, Ge;  Tang, Junwu;  Zhao, Chaofang;  Wu, Songhua;  Yu, Fangjie
  |  收藏  |  浏览/下载：195/0  |  提交时间：2019/06/26
Conceptual Design of CFETR CS Model Coil Structure 期刊论文  OAI收割
IEEE TRANSACTIONS ON PLASMA SCIENCE, 2018, 卷号: 46, 期号: 5, 页码: 1507-1511
作者:  Yin, Dapeng;  Wu, Yu;  Han, Houxiang;  Xu, Aihua;  Hao, Qiangwang
  |  收藏  |  浏览/下载：58/0  |  提交时间：2019/08/23
Effects of Nozzle-Strut Integrated Design Concepton on the Subsonic Turbine Stage Flowfield 期刊论文  OAI收割
JOURNAL OF THERMAL SCIENCE, 2014, 卷号: 23, 期号: 5, 页码: 494-504
作者:  Liu Jun;  Du Qiang;  Liu Guang;  Wang Pei;  Zhu Junqiang
收藏  |  浏览/下载：28/0  |  提交时间：2015/12/17
Design of reimaging F/1.0 long-wavelength infrared optical system (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Infrared Imaging and Applications, May 24, 2011 - May 24, 2011, Beijing, China
作者:  Zhang X.;  Zhang X.;  Zhang X.
收藏  |  浏览/下载：36/0  |  提交时间：2013/03/25
A reimaging F/1.0 long-wavelength infrared optical system is proposed. The design has a flexible opto-mechanical layout. The design process is as follows. Firstly  the catadioptric reimaging system consists of two reflecting mirrors and a relay lenses. Two reflecting mirrors make up of the first imaging system and are therefore free of chromatic aberrations  while low dispersion lenses were used in the reimaging system  so the optical system do not need achromatic design for a high image quality. Then  to correct high-order aberrations resulting from large relative aperture  more parameters need to be used with aspheric or diffractive surfaces due to modern optic technology development. Here  aspheric is selected for easily manufacture. Finally  the design is completed with the help of ZEMAX software. The effective focal length of the objective is 120mm and the field of view (FOV) is 4. The simulated final design shows adequate image quality and the modulation transfer function (MTF) is close to diffraction limit. The effect of the surrounding environmental temperature is analyzed using the concept of thermal defocusing  and the thermal compensation is discussed. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).  
The research on statistical properties of TDI-CCD imaging noise (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Imaging Detectors and Applications, May 24, 2011 - May 26, 2011, Beijing, China
Gu Y.-Y.; Shen X.-H.; He G.-X.
收藏  |  浏览/下载：23/0  |  提交时间：2013/03/25
TDI-CCD can improve the sensitivity of space camera without any degradation of spatial resolution which is widely used in aerospace imaging devices. The article describes the basic working principle and application characteristics of TDI-CCD devices  analyses the composition of TDI-CCD imaging noise  and propose a new method to analyze TDI-CCD imaging noise with statistical probability distribution. In order to estimate the distribution of gray values affect by noise we introduced the concept of skewness and kurtosis. We design an experiment using constant illumination light source  take image with TDI-CCD working at different stage such as stage 16  stage 32  stage 48  stage 64 and stage 96  analyse the characteristics of image noise with the method we proposed  experimental results show that the gray values approximately meet normal distribution in large sample cases. 2011 SPIE.  
Optical system design with high resolution and large field of view for the remote sensor (EI CONFERENCE) 会议论文  OAI收割
Chang J.; Weng Z.-C.; Wang Y.-T.; Cheng D.-W.; Jiang H.-L.
收藏  |  浏览/下载：29/0  |  提交时间：2013/03/25
In this paper  we are presenting a design method and its results for a space optical system with high resolution and wide field of view. This optical system can be used both in infrared and visible configurations. The designing of this system is based on an on-axis three-mirror anastigmatic (TMA) system. Here the on-axis concept allows wide field of view (FOV) enabling a diversity of designs available for the Multi-Object Spectrometer instruments optimized for low scattered and low emissive light. The available FOVs are upto 1 in both spectrum ranges  whereas the available aperture range is F/15 - F/10. The final optical system is a three-mirror telescope with two on-axis and one off-axis segment and its resolution is 0.3m or even lower. The distinguished feature of this design is that it maintains diffraction-limited image at wide wavelengths. The technological developments in the field of computer generated shaping of large-sized optical surface details with diffraction-limited imagery have opened new avenues towards the designing techniques. Such techniques permit us to expand these technological opportunities to fabricate the aspherical off-axis mirrors for a complex configuration.