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长春光学精密机械与物... [4]
水土保持研究所 [1]
生态环境研究中心 [1]
长春应用化学研究所 [1]
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OAI收割 [7]
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会议论文 [4]
期刊论文 [3]
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2015 [1]
2012 [2]
2011 [2]
2009 [1]
1996 [1]
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Ozone effects on wheat grain quality - A summary
期刊论文
OAI收割
ENVIRONMENTAL POLLUTION, 2015, 卷号: 197, 期号: 1, 页码: 203-213
作者:
Broberg, Malin C.
;
Feng, Zhaozhong
;
Xin, Yue
;
Pleijel, Hakan
收藏
  |  
浏览/下载:29/0
  |  
提交时间:2016/03/03
Baking quality
Mineral
Ozone
Protein
Quality
Starch
1000-Grain weight
Volume weight
Wheat
KW-output high beam quality diode laser array source (EI CONFERENCE)
会议论文
OAI收割
2012 International Conference on Optoelectronics and Microelectronics, ICOM 2012, August 23, 2012 - August 25, 2012, Changchun, China
作者:
Zhang J.
;
Wang L.
;
Wang L.
;
Wang L.
;
Liu Y.
收藏
  |  
浏览/下载:35/0
  |  
提交时间:2013/03/25
With the advantages of small volume
light weight
high efficiency and long lifespan
diode laser has been widely applied to industrial processing. Presently
for laser used as processing light source needs to amount to dozens of KW per cm2 of power density
how to increase power output and get smaller light spot for diode laser becomes a key problem. It is introduced that by designing beam shaping by ourselves and making use of optical system for beam blooming and focusing
808nm laser array composed of 20 bars eventually achieves the 1001.5w power output
coupling efficiency at 90%
11mm2 of light spot through experiments
which enables diode laser to be directly applied to cladding
welding and so on. 2012 IEEE.
Application of carbon fibre reinforced plastic for optical camera structure (EI CONFERENCE)
会议论文
OAI收割
2012 9th IEEE International Conference on Mechatronics and Automation, ICMA 2012, August 5, 2012 - August 8, 2012, Chengdu, China
An Y.
;
Yao J.-S.
收藏
  |  
浏览/下载:16/0
  |  
提交时间:2013/03/25
Optical camera is a high-precision optical instrument
and the optical lens must be always stable under various environments
so the structural materials of optical camera should have good stability and machining performance characteristics. Generally
the weight of the camera increases with the increasing size of optical camera aperture. The application of carbon fibre reinforced plastic(CFRP) in optical camera can help to improve the situation and meet the requirements of large volume and light weight. In this paper
the properties of several kind of materials used in camera structure were compared
the advantages of CFRP used in optical camera were analyzed
the CFRP application profiles of domestic and international were introduced
and the reason of gap was pointed out. There is a conclusion that CFRP will be widely used in the optical camera in China. 2012 IEEE.
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.
Growth and transpiration of maize and winter wheat in response to water deficits in pots and plots
期刊论文
OAI收割
ENVIRONMENTAL AND EXPERIMENTAL BOTANY, 2011, 卷号: 71, 期号: 1, 页码: 65-71
Wu Yuanzhi
;
Huang Mingbin
;
Warrington David N刘梅
收藏
  |  
浏览/下载:18/0
  |  
提交时间:2012/05/31
Daily transpiration rate
Transient transpiration rate
Shoot dry weight
Soil volume
Maize
Winter wheat
The design of composite optical encoder (EI CONFERENCE)
会议论文
OAI收割
9th International Conference on Electronic Measurement and Instruments, ICEMI 2009, August 16, 2009 - August 19, 2009, Beijing, China
Liang L.
;
Wan Q.
;
Qi L.
;
He J.
;
Du Y.
;
Lu X.
收藏
  |  
浏览/下载:18/0
  |  
提交时间:2013/03/25
In order to improve minimize volume
lighten the weight of Measurement and Control Equipment ??the design of a composite optical encoder is put forward in this paper. The composite encoder can achieve the angle measurement as the absolute encoder
and the servocontrol as the increment encoder. Base on the requirement of the Measurement and Control Equipment
the Composite code disc and the slot is designed
then the precision test is implemented on the composite optical encoder. The experimental result shows that the composite optical encoder not only output the measurement of the angle
but also provides speed feedback control signal. It has advantages of small volume
light weight
which can meet the requirements of Measurement and Control Equipment. 2009 IEEE.
Application of coupling model for stress relaxation of phenolphthalein polyether ketone
期刊论文
OAI收割
polymer, 1996, 卷号: 37, 期号: 14, 页码: 2975-2979
Han YC
;
Yang YM
;
Li BY
收藏
  |  
浏览/下载:143/15
  |  
提交时间:2010/12/22
TEMPERATURE DEPENDENCES
VISCOELASTIC PROPERTIES
AMORPHOUS POLYMERS
MOLECULAR-WEIGHT
VOLUME RECOVERY
POLYSTYRENE
MOTION