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长春光学精密机械与物... [4]
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Monolithic integration of MoS2-based visible detectors and GaN-based UV detectors
期刊论文
OAI收割
Photonics Research, 2019, 卷号: 7, 期号: 10, 页码: 1127-1133
作者:
Y.Wu
;
Z.Li
;
K.-W.Ang
;
Y.Jia
;
Z.Shi
  |  
收藏
  |  
浏览/下载:51/0
  |  
提交时间:2020/08/24
Monolithic integrated circuits,Chemical vapor deposition,Gallium nitride,III-V semiconductors,Integration,Layered semiconductors,Military applications,Molybdenum compounds,Optical communication,Photodetectors,Photons,Wide band gap semiconductors
Research of maneuvering target prediction and tracking technology based on IMM algorithm
期刊论文
OAI收割
Proceedings of SPIE: 8th International Symposium on Advanced Optical Manufacturing and Testing Technology: Optical Test, Measurement Technology, and Equipment, 2016, 卷号: 9684, 页码: 968430
作者:
Cao, Zheng
;
Mao, Yao
;
Deng, Chao
;
Liu, Qiong
;
Chen, Jing
  |  
收藏
  |  
浏览/下载:119/0
  |  
提交时间:2018/06/14
Ballistics
Fighter Aircraft
Forecasting
Manufacture
Markov Processes
Military Applications
Optical Testing
Target Tracking
Tracking (Position)
Trajectories
Unmanned Aerial Vehicles (Uav)
Vehicles
efficient and distributed authentication scheme for secure communication in manet
期刊论文
OAI收割
Journal of Computational Information Systems, 2013, 卷号: 9, 期号: 1, 页码: 57-64
Wang Daxing
;
Teng Jikai
  |  
收藏
  |  
浏览/下载:19/0
  |  
提交时间:2013/09/17
Authentication
Cryptography
Global system for mobile communications
Military applications
Network security
Telecommunication networks
Multi-focus image fusion algorithm based on adaptive PCNN and wavelet transform (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
Wu Z.-G.
;
Wang M.-J.
;
Han G.-L.
收藏
  |  
浏览/下载:75/0
  |  
提交时间:2013/03/25
Being an efficient method of information fusion
image fusion has been used in many fields such as machine vision
medical diagnosis
military applications and remote sensing.In this paper
Pulse Coupled Neural Network (PCNN) is introduced in this research field for its interesting properties in image processing
including segmentation
target recognition et al.
and a novel algorithm based on PCNN and Wavelet Transform for Multi-focus image fusion is proposed. First
the two original images are decomposed by wavelet transform. Then
based on the PCNN
a fusion rule in the Wavelet domain is given. This algorithm uses the wavelet coefficient in each frequency domain as the linking strength
so that its value can be chosen adaptively. Wavelet coefficients map to the range of image gray-scale. The output threshold function attenuates to minimum gray over time. Then all pixels of image get the ignition. So
the output of PCNN in each iteration time is ignition wavelet coefficients of threshold strength in different time. At this moment
the sequences of ignition of wavelet coefficients represent ignition timing of each neuron. The ignition timing of PCNN in each neuron is mapped to corresponding image gray-scale range
which is a picture of ignition timing mapping. Then it can judge the targets in the neuron are obvious features or not obvious. The fusion coefficients are decided by the compare-selection operator with the firing time gradient maps and the fusion image is reconstructed by wavelet inverse transform. Furthermore
by this algorithm
the threshold adjusting constant is estimated by appointed iteration number. Furthermore
In order to sufficient reflect order of the firing time
the threshold adjusting constant is estimated by appointed iteration number. So after the iteration achieved
each of the wavelet coefficient is activated. In order to verify the effectiveness of proposed rules
the experiments upon Multi-focus image are done. Moreover
comparative results of evaluating fusion quality are listed. The experimental results show that the method can effectively enhance the edge details and improve the spatial resolution of the image. 2011 SPIE.
Experiments of second harmonic generation output in pulsed TEA CO 2 laser (EI CONFERENCE)
会议论文
OAI收割
High-Power Lasers and Applications V, October 18, 2010 - October 19, 2010, Beijing, China
作者:
Li D.
收藏
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浏览/下载:52/0
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提交时间:2013/03/25
It is always the hot subject to realize the output of high-power laser in the range of 3-5m wavelength. This rang of wave band has greatly important applications in military because it located in the atmosphere window. Generally there are two ways to obtain this range of laser wavelength. One way is through optical parameter oscillation (OPO) from shorter laser wavelength and the other is through second harmonic generation (SHG) from longer laser wavelength. Firstly
the comparison between tow nonlinear crystals ZnGeP2 and AgGaSe2 is conducted for their nonlinear coefficient and damaging threshold in theory. The theoretical results show that the crystal AgGaSe 2 is more suitable for the SHG of pulsed TEA CO2 laser. When using pulsed TEA CO2 laser with wavelength of 9.3m to pumping AgGaSe2 SHG crystal
the wavelength of 4.65m is obtained. In the condition of repetition rate 100Hz
the upmost output power of single pulse is up to level of 1W
which corresponding efficiency of SHG is about 6%. The experimental results show that the polarization of laser beam has greatly influence on the SHG output of the crystal. Under the radiation of 3MW/cm 2 from fundamental wave and the right position for maximal SHG output in the crystal
when polarization of laser beam rotates 4.5
the SHG output of energy decrease about 30%. The research of this paper will make a foundation for further development of mid-infrared laser. 2010 Copyright SPIE - The International Society for Optical Engineering.
面向服务的舰船导弹防御及服务扰动建模
期刊论文
OAI收割
系统工程与电子技术, 2010, 卷号: 32, 期号: 4, 页码: 791-794,811
邓勇
;
胡晓惠
;
张中兆
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收藏
  |  
浏览/下载:14/0
  |  
提交时间:2011/05/23
Web服务
建模
扰动
导弹防御Computer crime
Data processing
Marine missiles
Military applications
Military rockets
Radar tracking
Tracking radar
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:29/0
  |  
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.