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长春光学精密机械与物... [6]
合肥物质科学研究院 [1]
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OAI收割 [7]
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会议论文 [6]
期刊论文 [1]
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2020 [1]
2011 [2]
2008 [1]
2006 [1]
2005 [2]
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第三代压水堆核电站CAP1400 1E级壳内电缆附件研制及鉴定试验
期刊论文
OAI收割
核科学与工程, 2020, 卷号: 40
-
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收藏
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浏览/下载:15/0
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提交时间:2020/10/26
CAP1400Class 1Ein Containment Cable Accessories
Technical Requirements
Materials Research
Structure Design
Qualification Test
CAP1400 1E级壳内电缆附件
技术要求
材料研究
结构设计
鉴定试验
A vertex tracking technique based on airborne opticalequipment (EI CONFERENCE)
会议论文
OAI收割
2011 International Conference on Electronics and Optoelectronics, ICEOE 2011, July 29, 2011 - July 31, 2011, Dalian, China
Li Q.
收藏
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浏览/下载:13/0
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提交时间:2013/03/25
After analyzing the advantages and disadvantages of photoelectric tracking system withhorizontal gimbal and X-Y double-axis gimbal
a vertex tracking method based on airborne photoelectricequipmenthas been presented. The method
which combines advantages of horizontal gimbal and X-Y double-axis gimbal
can effectively track target in the blind area. experiments show that the tracking method is simple
tracking accuracy is 3
meet the technical requirements. 2011 IEEE.
The stability design and realization of airborne platform based on TMS320F2812 (EI CONFERENCE)
会议论文
OAI收割
2011 International Conference on Mechatronic Science, Electric Engineering and Computer, MEC 2011, August 19, 2011 - August 22, 2011, Jilin, China
作者:
Zhang X.
;
Zhang X.
;
Zhang X.
收藏
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浏览/下载:40/0
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提交时间:2013/03/25
Airborne electro-optical stable platform can isolate movement and vibration of the airframe
stabilizes the optic axis of the photoelectic detector
realize the observation and tracking for the object. It has comprehensive application value in army and cicil field. Most of present airborne platforms are analogic control system
digital control system can improve the system general performance
digital control is the development direction of platform systems. In view of the requirements of isolating disturbances and stabilizing optical axis of high-precision photoelectric guidance system
a three-axis stabilized platform system centering on the rate gyro was designed. The disturbance-isolation theory of the stabilized platform was analyzed and the control structure including multiple closed-loops was designed. At last a controller of the servo system based on TMS320F2812 DSP has been designed. Experiment results meet the technical index and precision requirement
and illustrate the practicability and effectiveness of the scheme. 2011 IEEE.
A new authentication protocol for wireless communication network based on IEEE802.16 (EI CONFERENCE)
会议论文
OAI收割
2008 International Symposium on Parallel and Distributed Processing with Applications, ISPA 2008, December 10, 2008 - December 12, 2008, Sydney, NSW, Australia
Li R.
;
Fang Z.
;
Cao W.
;
Yin Y.
;
Xu P.
收藏
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浏览/下载:26/0
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提交时间:2013/03/25
After analyzing the specific security requirements of the wireless communication network based on IEEE802.16
a series of key issues about security methods and techniques were researched. A new authentication protocol for wireless mobile environment was proposed and designed. Then
its security was analyzed from the angle of technical realization and formal analysis to verify whether the original safety goals were achieved. Especially
formal analysis was mostly done. Finally
system testing was also carried out and the results were analyzed to verify function and performance of the new protocol. 2008 IEEE.
Research of automatic test technology of parameters used in a dual-CCD TV measure-system (EI CONFERENCE)
会议论文
OAI收割
2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, November 2, 2005 - November 5, 2005, Zian, China
作者:
Wang L.
;
Li Y.
;
Li Y.
;
Li Y.
;
Li Y.
收藏
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浏览/下载:18/0
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提交时间:2013/03/25
This paper describes a kind of automatic test technology of the parameters used in a dual-CCD TV measure-system (TV -MS) .The TV -MS is the ground control equipment of the anti-tank missile and integrates the technologies of optical
machine and electronics. It is important and key component. The main technical parameters of the TV -MS are field of view
zero point
precision
sensitivity
anti-jamming ability
zooming time and focus time
etc. To insure the TV -MS satisfying the tactical and technical requirements and discover fault and reason
a fast and accurate equipment satisfying the test technical parameters of the TV -MS is urgently needed in manufacture and service. Firstly
the parameter test system converted optical signal to electronic signal
implemented automatic control of the invariant illumination of parallel pipeline output. Secondly
data and command delivering
displaying or printing are realized by using 80C196KB. The experiment result shows that the approach of automatic testing of the Parameters used in a dual-CCD TV -MS is successful and it can be used for all tests of the functions and parameters of the TV -MS. The main innovations are to realize the fast
veracious measure of technical parameters of the dual-CCD TV-MS
and integrate the technologies of optics
machineries and electronics. An advanced means is provided to judge the technical states
find malfunctions and discover the reasons in producing and maintaining process. The equipment suited for anti-tank missile systems is given.
CMOS APS imaging system application in star tracker (EI CONFERENCE)
会议论文
OAI收割
Advanced Materials and Devices for Sensing and Imaging II, November 8, 2004 - November 10, 2004, Beijing, China
作者:
Li J.
;
Liu Y.
;
Liu Y.
;
Liu Y.
;
Liu J.
收藏
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浏览/下载:56/0
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提交时间:2013/03/25
Small satellites are capable of performing space explore missions that require accurate attitude determination and control. However
low weight
size
power and cost requirements limit the types of attitude sensor of small craft
such as CCD
are not practical for small satellites. CMOS APS is a good substitute for attitude sensors of small craft. Some of the technical advantages of CMOS APS are no blooming
single power
low power consumption
small size and little support circuitry
direct digital output
simple to system design
in particular
radiation-hard characteristic compare with CCD. This paper discusses the application probability of CMOS APS in star tracker for small satellites
further more
a prototype ground-based star camera based on STAR250 CMOS image sensor has been built. In order to extract stars positions coordinates
subpixel accuracy centroiding algorithm has been developed and tested on some ground-based images. Moreover
the camera system star sensitivity and noise model are analyzed
and the system accuracy is been evaluated. Experimental results indicate that a star camera based on CMOS APS is a viable practical attitude sensor appropriate for space small satellites.
Measuring the system gain of the TDI CCD remote sensing camera (EI CONFERENCE)
会议论文
OAI收割
Advanced Materials and Devices for Sensing and Imaging II, November 8, 2004 - November 10, 2004, Beijing, China
Ya-xia L.
;
Hai-ming B.
;
Jie L.
;
Jin R.
;
Zhi-hang H.
收藏
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浏览/下载:62/0
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提交时间:2013/03/25
The gain of a TDI CCD camera is the conversion between the number of electrons recorded by the TDI CCD and the number of digital units (counts) contained in the CCD image"[1]. TDI CCD camera has been a main technical approach for meeting the requirements of high-resolution and lightweight of remote sensing equipment. It is useful to know this conversion for evaluating the performance of the TDI CCD camera. In general
a lower gain is better. However
the resulting slope is the gain of the TDI CCD. We did the experiments using the Integration Sphere in order to get a flat field effects. We calculated the gain of the four IT-EI-2048 TDI CCD. The results and figures of the four TDI CCD are given.
this is only true as long as the total well depth (number of electrons that a pixel can hold) of the pixels can be represented. High gains result in higher digitization noise. System gains are designed to be a compromise between the extremes of high digitization noise and loss of well depth. In this paper
the mathematical theory is given behind the gain calculation on a TDI CCD camera and shows how the mathematics suggests ways to measure the gain accurately according to the Axiom Tech. The gains were computed using the mean-variance method
also known as the method of photon transfer curves. This method uses the effect of quantization on the variance in the measured counts over a uniformly illuminated patch of the detector. This derivation uses the concepts of signal and noise. A linear fit is done of variance vs. mean