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浏览/检索结果: 共13条，第1-10条 帮助

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An Improved Aerosol Retrieval Algorithm for FY-4A/AGRI Data Based on the GRASP Framework 期刊论文  OAI收割
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 2025, 卷号: 63, 页码: 4103517
作者:  Wang, Huaxuan;  Fan, Meng;  Jiao, Sunxin;  Yan, Huanhuan;  Xu, Benben
  |  收藏  |  浏览/下载：6/0  |  提交时间：2025/04/21
Design and Analysis of a Stable Support Structure for a Near-Infrared Space-Borne Doppler Asymmetric Spatial Heterodyne Interferometer 期刊论文  OAI收割
APPLIED SCIENCES-BASEL, 2023, 卷号: 13, 期号: 18
作者:  Sun, Jian;  Wang, Wei;  Chang, Chenguang;  Fu, Di;  Hao, Xiongbo
  |  收藏  |  浏览/下载：17/0  |  提交时间：2023/11/02
Optimization study and design of scintillating fiber detector for D-T neutron measurements on EAST with Geant4 期刊论文  OAI收割
NUCLEAR SCIENCE AND TECHNIQUES, 2022, 卷号: 33
作者:  Chen, Wei-Kun;  Hu, Li-Qun;  Zhong, Guo-Qiang;  Hong, Bing;  Zhou, Rui-Jie
  |  收藏  |  浏览/下载：46/0  |  提交时间：2022/12/23
Using Monte Carlo Simulation to Improve the Performance of Semivariograms for Choosing the Remote Sensing Imagery Resolution for Natural Resource Surveys: Case Study on Three Counties in East, Central, and West China 期刊论文  OAI收割
ISPRS INTERNATIONAL JOURNAL OF GEO-INFORMATION, 2018, 卷号: 7, 期号: 1, 页码: 20
作者:  Wang, Juanle;  Zhu, Junxiang;  Han, Xuehua
  |  收藏  |  浏览/下载：28/0  |  提交时间：2019/05/30
Using Monte Carlo Simulation to Improve the Performance of Semivariograms for Choosing the Remote Sensing Imagery Resolution for Natural Resource Surveys: Case Study on Three Counties in East, Central, and West China 期刊论文  OAI收割
ISPRS INTERNATIONAL JOURNAL OF GEO-INFORMATION, 2018, 卷号: 7, 期号: 1, 页码: 20
作者:  Wang, Juanle;  Zhu, Junxiang;  Han, Xuehua
  |  收藏  |  浏览/下载：10/0  |  提交时间：2019/05/30
Using Monte Carlo Simulation to Improve the Performance of Semivariograms for Choosing the Remote Sensing Imagery Resolution for Natural Resource Surveys: Case Study on Three Counties in East, Central, and West China 期刊论文  OAI收割
ISPRS INTERNATIONAL JOURNAL OF GEO-INFORMATION, 2018, 卷号: 7, 期号: 1, 页码: 20
作者:  Wang, Juanle;  Zhu, Junxiang;  Han, Xuehua
  |  收藏  |  浏览/下载：11/0  |  提交时间：2019/05/30
Multiresolution Imaging 期刊论文  OAI收割
ieee transactions on cybernetics, 2014, 卷号: 44, 期号: 1, 页码: 149-160
作者:  Lu, Xiaoqiang;  Li, Xuelong
收藏  |  浏览/下载：32/0  |  提交时间：2015/03/18
Design of motion compensation mechanism of satellite remote sensing camera (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China
Gu S.; Yan Y.; Xu K.; Jin G.
收藏  |  浏览/下载：47/0  |  提交时间：2013/03/25
With the development of aerospace remote sensing technology  the ground resolution of remote sensing camera enhances continuously. Since there is relative motion between camera and ground target when taking pictures  the target image recorded in recording media is moved and blurred. In order to enhance the imaging quality and resolution of the camera  the image motion had to be compensated. In order to abate the effect of image motion to image quality of space camera and improve the resolution of the camera  the compensation method of image motion to space camera is researched. First  the reason of producing drift angle and adjustment principle are analyzed in this paper. This paper introduce the composition and transmission principle of image motion compensation mechanism. Second  the system adopts 80C31 as controller of drift angle  and adopts stepping motor for actuators  and adopts absolute photoelectric encoder as the drift Angle measuring element. Then the control mathematical model of the image motion compensation mechanism are deduced  and it achieve the closed-loop control of the drift angle position. At the last  this paper analyses the transmission precision of the mechanism. Through the experiment  we measured the actual precision of the image motion compensation mechanism  and compared with the theoretical analysis. There are two major contributions in this paper. First  the traditional image motion compensation mechanism is big volume and quality heavy. This has not fit for the development trend of space camera miniaturization and lightweight. But if reduce the volume and quality of mechanism  it will bring adverse effects for the precision and stiffness of mechanism. For this problem  This paper designed a image motion compensation that have some advantages such as small size  light weight at the same time  high precision  stiffness and so on. This image motion compensation can be applicable to the small optics cameras with high resolution. Second  the traditional mechanism control need to corrected  fitting and iterative for the control formula of mechanism. Only in this way  we can get the optimal control mathematical model. This paper has high precision of the control formula derived. It can achieve the high precision control without fitting  It also simplify the difficulty of control mathematical model establishment. This paper designed the range of adjusting of image motion compensation mechanism between -5 +5. Based on choosing-5  -4  -3  -2  -1  0  +1  +2  +3  +4  +4 as the expectation value of the imaginary drift angle  we get ten groups of the fact data in adjusting drift angle measured. The test results show that the precision of the drift angle control system can be achieved in 1. It can meet the system requirements that the precision of the control system is less than 3'  and it can achieve the high-precision image motion compensation. 2011 SPIE.  
High resolution gray-scale modulation method based on linear superposition for LED displays (EI CONFERENCE) 会议论文  OAI收割
2011 International Conference on Control, Automation and Systems Engineering, CASE 2011, July 30, 2011 - July 31, 2011, Singapore, Singapore
Feng Y.; Xu X.; Miao C.; Ding T.
收藏  |  浏览/下载：11/0  |  提交时间：2013/03/25
An improved fast parallel SPIHT algorithm and its FPGA implementation (EI CONFERENCE) 会议论文  OAI收割
2010 2nd International Conference on Future Computer and Communication, ICFCC 2010, May 21, 2010 - May 24, 2010, Wuhan, China
作者:  Jin L.-X.;  Tao H.-J.;  Wu Y.-H.
收藏  |  浏览/下载：19/0  |  提交时间：2013/03/25
In view of the current stringent need to the real-time compression algorithm of the high-speed and high-resolution image  such as remote sensing or medical image and so on  in this paper  No List SPIHT (NLS) algorithm has been improved  and a fast parallel SPIHT algorithm is proposed  which is suitable to implement with FPGA. It can deal with all bit-planes simultaneously  and process in the speed of 4pixels/period  so the encoding time is only relative to the image resolution. The experimental results show that  the processing capacity can achieve 200MPixels/s  when the input clock is 50MHz  the system of this paper need 2.29ms to complete lossless compression of a 512x512x8bit image  and only requires 1.31ms in the optimal state. The improved algorithm keeps the high SNR unchanged  increases the speed greatly and reduces the size of the needed storage space. It can implement lossless or lossy compression  and the compression ratio can be controlled. It could be widely used in the field of the high-speed and high-resolution image compression. 2010 IEEE.