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	China's Detonation-driven Shock Tube Wind Tunnels: A Case Study of Transnational Science in Aeronautics during the Cold War 期刊论文 OAI收割 EAST ASIAN SCIENCE TECHNOLOGY AND SOCIETY-AN INTERNATIONAL JOURNAL, 2021, 页码: 28 作者: Zhihu, Zhang; Seely, Bruce E. \| 收藏 \| 浏览/下载：15/0 \| 提交时间：2022/07/01 Shock tubes wind tunnels China international collaboration technology transfer research & development aerospace technology Cold War
	HPC software capability landscape in China 期刊论文 OAI收割 INTERNATIONAL JOURNAL OF HIGH PERFORMANCE COMPUTING APPLICATIONS, 2020, 卷号: 34, 期号: 1, 页码: 115-153 作者: Chen, Daobi; Yuan, Liang; Zhang, Yunquan; Yan, Jingfu; Kahaner, David \| 收藏 \| 浏览/下载：56/0 \| 提交时间：2020/12/10 Advanced materials artificial intelligence AI biotechnology biotech earth sciences education energy power natural resources engineering environmental pollution government S&T policy funding high-performance computing (HPC) hw sw apps information technology IT manufacturing mathematics meteorology modeling simulation physics space satellite aerospace
	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.
	Aerospace reconnaissance distributed system design based on WES (EI CONFERENCE) 会议论文 OAI收割 2nd International Conference on e-Business and Information System Security, EBISS2010, May 22, 2010 - May 23, 2010, Wuhan, China 作者: Wang H.; Wang H.; Wang H.; Wang H. 收藏 \| 浏览/下载：33/0 \| 提交时间：2013/03/25 A distributed embedded system is designed based on WES(Windows Embedded Studio) which is used to improve the stability and reliability of the aerospace optoelectronic reconnaissance platform and enhance the visualization in the complicated natural environment. This system is combined with the component of distributed data communication the component of CCD image acquisition and transfers all of which are designed on the hardware of PM401 by WES. Then plying the EWF technology integrate the stable and reliable distributed system. At last using NHPP mathematic model analyze the stability and reliability of the system. The results show that the stability and the reliability of this distributed system works well up to 94.61%. 2010 IEEE.
	Embedded system of image storage based on Fiber Channel (EI CONFERENCE) 会议论文 OAI收割 Quantum Optics, Optical Data Storage, and Advanced Microlithography, November 12, 2007 - November 14, 2007, Beijing, China 作者: Wang H.; Wang H.; Wang H.; Wang H.; Chen X. 收藏 \| 浏览/下载：19/0 \| 提交时间：2013/03/25 In domains of aerospace aviation aiming and optic measure etc. the embedded system of imaging processing and recording is absolutely necessary which has small volume high processing speed and high resolution. But the embedded storage technology becomes system bottleneck because of developing slowly. It is used to use RAID to promote storage speed but it is unsuitable for the embedded system because of its big volume. Fiber channel (FC) technology offers a new method to develop the high-speed portable storage system. In order to make storage subsystem meet the needs of high storage rate make use of powerful Virtex-4 FPGA and high speed fiber channel advance a project of embedded system of digital image storage based on Xilinx Fiber Channel Arbitrated Loop LogiCORE. This project utilizes Virtex4 RocketIO MGT transceivers to transmit the data serially and connects many Fiber Channel hard drivers by using of Arbitrated Loop optionally. It can achieve 400MBps storage rate breaks through the bottleneck of PCI interface and has excellences of high-speed real-time portable and massive capacity.