中国科学院机构知识库网格系统: 检索

Stretch/Compress-Modulated Spin Splitting in One-Dimensional Melem Chain with a Helical Structure 期刊论文 OAI收割
Physica Status Solidi-Rapid Research Letters, 2019, 卷号: 13, 期号: 10, 页码: 5
作者: D.Han; X.J.Chen; H.Xu; C.Jiao; J.L.Xu

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收藏 | 浏览/下载：12/0 | 提交时间：2020/08/24

density functional theory,helical structures,molecule chains,spin-orbit coupling,spin splitting,rashba,nanowire,Materials Science,Physics

On-Orbit Signal-to-Noise Ratio Test Method for Night-Light Camera in Luojia 1-01 Satellite Based on Time-Sequence Imagery 期刊论文 OAI收割
Sensors, 2019, 卷号: 19, 期号: 19, 页码: 18
作者: W.Wang; X.Zhong; Z.Q.Su

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收藏 | 浏览/下载：19/0 | 提交时间：2020/08/24

SNR,night-light,time-sequence imagery,Luojia 1-01 satellite,low-resolution,on-orbit test,radiometric calibration,urbanization,dynamics,china,scales,Chemistry,Engineering,Instruments & Instrumentation

Design of Positioning Mechanism Fit Clearances Based on On-Orbit Re-Orientation Accuracy 期刊论文 OAI收割
Applied Sciences-Basel, 2019, 卷号: 9, 期号: 21, 页码: 10
作者: Q.Y.Li; L.B.Yang; W.G.Zhao; Z.Shi; Z.Y.Liu

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收藏 | 浏览/下载：19/0 | 提交时间：2020/08/24

on-orbit replacement,optical unit,re-orientation accuracy,fit,clearances design,Chemistry,Engineering,Materials Science,Physics

Quasi-All-Passive Thermal Control System Design and On-Orbit Validation of Luojia 1-01 Satellite 期刊论文 OAI收割
Sensors, 2019, 卷号: 19, 期号: 4, 页码: 18
作者: L.Yang; Q.Li; L.Kong; S.Gu; L.Zhang

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收藏 | 浏览/下载：39/0 | 提交时间：2020/08/24

quasi-all-passive,thermal analysis,thermal balanced test,on-orbit,performance,temperature,fluctuation,Chemistry,Engineering,Instruments & Instrumentation

n-type Rashba spin splitting in a bilayer inorganic halide perovskite with external electric field 期刊论文 OAI收割
Journal of Physics-Condensed Matter, 2018, 卷号: 30, 期号: 26, 页码: 5
作者: Chen, X. J.; Liu, L.; Shen, D. Z.

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收藏 | 浏览/下载：7/0 | 提交时间：2019/09/17

Rashba spin-orbit coupling halide perovskite density functional theory external electric field cesium lead halide energy plane gas Physics

Design of semi-physical simulation for small satellite by virtual display (EI CONFERENCE) 会议论文 OAI收割
2011 3rd International Conference on Mechanical and Electronics Engineering, ICMEE 2011, September 23, 2011 - September 25, 2011, Hefei, China
Xu K.; Lv Y.; Jin G.

收藏 | 浏览/下载：19/0 | 提交时间：2013/03/25

Semi-physical simulation of attitude control system is the more synthetically test and verify for designing of small satellite control system. It is an important means of small satellite development. However the results of current semi-physical simulation system have a lot of non-intuitive. Compare with the actual environment the simulation environment still has striking disparity. So the shortcomings affect precision of simulation. Based on the virtual display technology the group semi-physical simulation system has been constructed for attitude control of small satellite due to the combination with xPC real-time environment the simulation computer high-precision single-axis air-bearing turntable reaction wheel air thrust device fiber gyroscopes sensors synchronizer power subsystem and wireless devices virtual display computer etc. Semi-physical simulation achieved the visual simulation in orbit and tracked new information of virtual environment of space into real-time simulation computer. Simulation results show that the simulation system for real-time attitude and orbit position of small satellite semi-physical simulation has an excellent display effect. At the same time Real-time transfuse of orbit information provides a more accurate space environment simulation. The simulation system of small satellite attitude control to design and evaluate the more direct and convenient. (2012) Trans Tech Publications Switzerland.

Research of software re-injection technology for aerospace camera controller in-orbit (EI CONFERENCE) 会议论文 OAI收割
2012 9th IEEE International Conference on Mechatronics and Automation, ICMA 2012, August 5, 2012 - August 8, 2012, Chengdu, China
Xu W.

收藏 | 浏览/下载：15/0 | 提交时间：2013/03/25

For the factors of increased of tasks enhancements of functions and improvement of integrity and complexity in aerospace camera application system has raised high and long-term in-orbit autonomy and reliability requirements on camera controller. Based on an actual project application background this paper has put forward a design method of new high reliability aerospace camera controller in-orbit software reinjection instruction sequence which use TSC695F as kernel CPU and process flow of bootstrap receive cache checkout and storage update data. Finally combined with specific test module for camera controller software re-injection the validity of the software re-injection method raised here has been verified. Still here gives out reference codes of update data package which generated by the ground. 2012 IEEE.

A hybrid median filter for enhancing dim small point targets and its fast implementation (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Multimedia and Signal Processing, CMSP 2011, May 14, 2011 - May 15, 2011, Guilin, Guangxi, China
Yang Q.

收藏 | 浏览/下载：17/0 | 提交时间：2013/03/25

Weak stars and middle altitude orbit satellites or high altitude orbit satellites are presented as dim point targets in images of astronomical observation. They have low intensity and occupy few pixels in image. In most situations the background of sky is always ununiform and there exists pulse noises. Thus results in targets submerging in background noises and low signal noise ratio (SNR). Median filter is an effective method for removing pulse noise. But it can blur image after modifying gray of non-noise pixels when image has low SNR. A hybrid median filter algorithm is proposed to process low SNR dim point targets image. The newly proposed method can suppress the pulse noises also can increase target $SNR$ and does not add extra fake targets. The time complexity of median filter is O(N2)(N is the widow size) and is difficult to implement in hardware. For quasi real time application a fast implementation of our hybrid median filter is proposed to reduce the time complexity to O(N). Experimental results show that the newly proposed algorithm is superior to ordinary median filter and fast median filter by comparing visual effect and performance. 2011 IEEE.

Space optical remote sensor of the CAE thermal control index calculation method (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Advanced Design and Manufacturing Engineering, ADME 2011, September 16, 2011 - September 18, 2011, Guangzhou, China
作者: Li L.

收藏 | 浏览/下载：17/0 | 提交时间：2013/03/25

The thermal control indicators CAE methods of Space optical remote sensor are analyzed in the presented work. We sat up a thermal optical analysis model for space optical remote sensor. By assuming fully covered by in-orbit temperature load and using the finite element method for thermal deformation analysis we obtained the optical remote sensor surface deformation and displacement under various thermal loading. Using ZERNIKE polynomial wave was fitted to obtain ZERNIKE polynomial coefficients which were incorporated into the optical system design. Using CODE V optical calculation software heat-ray machines under elastic deformation of the system point spread function transfer function (MTF) wave front differential (WFE) etc. were calculated. Image quality changes of remote sensors are discussed in variety assumed cases such as temperature loads of quality change. By repeated iteration critical value of temperature fields meeting the design requirements are obtained for the optical system. Optical indicators were converged to the temperature field indicator then reasonable indicators of thermal control for remote sensors were obtained. For the thermal control design this method provided a reliable basis for design. (2011) Trans Tech Publications Switzerland.

Study on the flutter model of the imaging quality of TDICCD space camera (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Advanced Engineering Materials and Technology, AEMT 2011, July 29, 2011 - July 31, 2011, Sanya, China
作者: Chen X.; Chen X.; Chen X.

收藏 | 浏览/下载：13/0 | 提交时间：2013/03/25

For any On-orbit Space camera the influence of flutter on the imaging process of TDICCD space camera is inevitable thus causing the decline of image quality. This paper briefly introduces the principle of TIDCCD camera and how flutter affects the imaging process. Then through the analysis and calculation of practical program we find the acceleration criterion to avoid the blur of image quality. (2011) Trans Tech Publications.