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Two new neolignans from Gymnotheca involucrata 期刊论文  OAI收割
CHINESE CHEMICAL LETTERS, 2017, 卷号: 28, 期号: 5, 页码: 1049-1051
作者:  
Ding, LS;  Xiao, SJ;  Zhang, MS;  Guo, DL;  Chen, F
  |  收藏  |  浏览/下载:24/0  |  提交时间:2018/08/28
Analysis of laser jamming to satellite-based detector (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging, June 17, 2009 - June 19, 2009, Beijing, China
作者:  
Guo L.-H.;  Guo R.-H.;  Wang S.-W.
收藏  |  浏览/下载:30/0  |  提交时间:2013/03/25
The reconnaissance satellite  communication satellite and navigation satellite used in the military applications have played more and more important role in the advanced technique wars and already become the significant support and aid system for military actions. With the development of all kinds of satellites  anti-satellite laser weapons emerge as the times require. The experiments and analyses of laser disturbing CCD (charge coupled detector) in near ground have been studied by many research groups  but their results are not suitable to the case that using laser disturbs the satellite-based detector. Because the distance between the satellite-based detector and the ground is very large  it is difficult to damage it directly. However the optical receive system of satellite detector has large optical gain  so laser disturbing satellite detector is possible. In order to determine its feasibility  the theoretical analyses and experimental study are carried out in the paper. Firstly  the influence factors of laser disturbing satellite detector are analyzed in detail  which including laser power density on the surface of the detector after long distance transmission  and laser power density threshold for disturbing etc. These factors are not only induced by the satellite orbit  but dependence on the following parameters: laser average power in the ground  laser beam quality  tracing and aiming precision and atmospheric transmission. A calculation model is developed by considering all factors which then the power density entering into the detector can be calculated. Secondly  the laser disturbing experiment is performed by using LD (laser diode) with the wavelength 808 nm disturbing CCD 5 kilometer away  which the disturbing threshold value is obtained as 3.5510-4mW/cm2 that coincides with other researcher's results. Finally  using the theoretical model  the energy density of laser on the photosensitive surface of MSTI-3 satellite detector is estimated as about 100mW/cm2  which is largely exceed the disturbing threshold and therefore verify the feasibility of using this kind of laser disturbing the satellite-based detector. According to the results. using the similar laser power density absolutely saturate the requirements to laser disturbing satellite-based detector. If considering the peak power of pulsed laser  even decrease laser average power  it is also possible to damage the detector. This result will provide the reliable evidences to evaluate the effect of laser disturbing satellite-based detector. 2009 SPIE.  
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.  
AN ESTIMATION OF THE UPPER LIMIT OF PHOTON MAGNETIC MOMENT 期刊论文  OAI收割
A Monthly Journal of Science, 1981, 期号: 9, 页码: 860
作者:  
Tang XW(唐孝威);  Li S(李士);  Wang KB(王克斌)
收藏  |  浏览/下载:19/0  |  提交时间:2015/12/07