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CAS IR Grid
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理论物理研究所 [2]
工程热物理研究所 [2]
力学研究所 [1]
长春光学精密机械与物... [1]
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期刊论文 [5]
会议论文 [1]
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Physics [2]
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A new weighting method for improving the WENO-Z scheme
期刊论文
OAI收割
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS, 2018, 卷号: 87, 期号: 6, 页码: 271-291
作者:
Liu SP(刘升平)
;
Shen YQ(申义庆)
;
Zeng FJ
;
Yu M
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浏览/下载:30/0
  |  
提交时间:2018/07/17
Global Smoothness Indicator
Low Numerical Dissipation
Weighting Function
Weno-z Scheme
Far-field focusing of laser beam based on digital image processing techniques (EI CONFERENCE)
会议论文
OAI收割
Optoelectronic Imaging and Multimedia Technology, October 18, 2010 - October 20, 2010, Beijing, China
作者:
Zhao S.
;
Tian Y.-Z.
;
Liu L.-S.
;
Guo J.
;
Zhang H.-Y.
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  |  
浏览/下载:27/0
  |  
提交时间:2013/03/25
In order to lead the laser beam transmit in the atmosphere convergently
an experiment of laser focus at the distance of 450m and 300m has been operated in the outdoor place. The actual manipulations are as follows: Firstly
the laser was collimated by a beam expander
then the near-parallel laser beam was transmitted with a Galileo telescope system
and the distance between the concave lens and the convex lens can be tuned through a precise displacement platform
so the focus of the system changed due to the tiny displacement of the concave lens. Secondly
the average power of the laser spot can be measured using power meter
the power is 47.67mW and the standard deviation is 0.67mW while the focal length is 450m. Thirdly
the energy distribution was found through the laser beam analyzer. The spot images were saved using the beam analyzer
then the saved image can be processed with Matlab software afterwards. The function named EDGE and Sobel operator was used in the pre-processing of the saved image
then method of median filter was used in the course of image de-noising and 53H filter was adopted in the signal analysis. The diameter of laser spot was obtained by the method above
the diameter is 5.56mm and the standard deviation is 0.24mm. The spot center excursion is 0.56mm
it is 10.43% of the total diameter of the laser spot. At last
the key factors of the energy dissipation in the focusing system can be summarized as follows: restriction of the diffraction limit
attenuation in the atmosphere
geometrical aberration of optical system
and the diffraction limit and the geometrical aberration are significant in the three factors above
so we can reduce the impact of the both factors during the design of optical system. The reliable referenced data of the system design can be acquired through the primary experiment research. 2010 SPIE.
Study on topology and vortex structure in a diffusion cascade
期刊论文
OAI收割
SCIENCE IN CHINA SERIES E-TECHNOLOGICAL SCIENCES, 2009, 卷号: 52, 期号: 8, 页码: 2305-2315
作者:
Zhang YongJun
;
Wang HuiShe
;
Xu JianZhong
;
Feng GuoTai
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浏览/下载:21/0
  |  
提交时间:2015/12/18
diffusion cascade
topology analysis
vortex structure
dissipation function
Factorization of the dephasing process in a quantum open system
期刊论文
OAI收割
PHYSICAL REVIEW E, 2007, 卷号: 75, 期号: 1, 页码: -
作者:
Gao, Y. B.
;
Sun, C. P.
;
Gao, YB , Beijing Univ Technol, Coll Appl Sci, Beijing 100022, Peoples R China
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收藏
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浏览/下载:19/0
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提交时间:2012/08/02
Fluctuation-dissipation Theorem
Wave-function
General Picture
Decoherence
Dynamics
Distillability of two entanglement particles transmitted through a noisy channel
期刊论文
OAI收割
PHYSICAL REVIEW A, 2000, 卷号: 62, 期号: 6, 页码: -
作者:
Yi, XX
;
Guo, GC
;
Yi, XX , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
  |  
收藏
  |  
浏览/下载:15/0
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提交时间:2012/08/29
Quantum-computer Memory
Reducing Decoherence
Density-matrices
Wave-function
Mixed States
Separability
Distillation
Dissipation
Criterion
Cannot
Thermodynamic Significance of Human BasalMetabolism
期刊论文
OAI收割
JOURNAL OF THERMAL SCIENCE, 1993, 卷号: 2, 期号: 2, 页码: 81,86
Wang Cuncheng
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浏览/下载:13/0
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提交时间:2013/03/13
thermodynamic laws
basal metabolism
blood perfusion
dissipation function
exergy loss