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长春光学精密机械与物... [2]
清华大学 [1]
上海大学 [1]
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会议论文 [3]
期刊论文 [1]
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2015 [1]
2011 [2]
2010 [1]
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Continuous-time multi-agent averaging with relative-state-dependent measurement noises: matrix intensity functions
期刊论文
IET CONTROL THEORY AND APPLICATIONS, 2015, 卷号: 9, 页码: 374-380
作者:
Li, Tao[1]
;
Wu, Fuke[2]
;
Zhang, Ji-Feng[3]
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提交时间:2019/04/26
stochastic processes
differential equations
matrix algebra
graph theory
convergence
continuous time systems
measurement errors
multi-agent systems
continuous-time multiagent averaging
relative-state-dependent measurement noises
matrix intensity functions
distributed averaging
nonlinear matrix function
convergence rate
steady-state error
algebraic graph theory
stochastic differential equations
A hybrid median filter for enhancing dim small point targets and its fast implementation (EI CONFERENCE)
会议论文
2011 International Conference on Multimedia and Signal Processing, CMSP 2011, May 14, 2011 - May 15, 2011, Guilin, Guangxi, China
Yang Q.
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提交时间:2013/03/25
Weak stars and middle altitude orbit satellites or high altitude orbit satellites are presented as dim point targets in images of astronomical observation. They have low intensity and occupy few pixels in image. In most situations
the background of sky is always ununiform and there exists pulse noises. Thus results in targets submerging in background noises and low signal noise ratio (SNR). Median filter is an effective method for removing pulse noise. But it can blur image after modifying gray of non-noise pixels when image has low SNR. A hybrid median filter algorithm is proposed to process low SNR dim point targets image. The newly proposed method can suppress the pulse noises
also can increase target $SNR$ and does not add extra fake targets. The time complexity of median filter is O(N2)(N is the widow size) and is difficult to implement in hardware. For quasi real time application
a fast implementation of our hybrid median filter is proposed to reduce the time complexity to O(N). Experimental results show that the newly proposed algorithm is superior to ordinary median filter and fast median filter by comparing visual effect and performance. 2011 IEEE.
Design and demonstration of micro multi-step mirrors and light source in micro FTIR (EI CONFERENCE)
会议论文
6th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2011, February 20, 2011 - February 23, 2011, Kaohsiung, Taiwan
Liang Z.
;
Fu J.
;
Feng C.
;
Liang J.
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提交时间:2013/03/25
To obtain high resolution
high signal-to-noise ratio (SNR)
high reliability and real time in wide spectral range
we study the space modulation Micro Fourier Transform Spectrometer (FTS) based on multi-step mirrors covering the spectral range of 3-5m and 8-12 m in theory and experiment. The influences of spectrum reconstruction caused by the diffraction and extended light source in Fourier Transform Infrared Spectrometer (FTIR) are analyzed. A method to reduce the noises in spectrum reconstruction and the relationship between coherent intensity and solid angle of light source are discussed. An extended light source with suitable size is chosen
considering the requirement of SNR and spectrum resolving power in the optical design. Furthermore
the fabrication of micro multi-step mirrors
which is the core part of FTS
is investigated. Three methods for fabricating multi-step micro mirrors are demonstrated. 2011 IEEE.
Analysis and application for a new type of optical fiber interferometer with three-beam system
会议论文
Proceedings of the SPIE - The International Society for Optical Engineering, Fundamental Problems of Optoelectronics and Microelectronics III, Harbin, China, INSPEC
Kai Yin
;
Liwei Wang
;
Tianhuai Ding
;
Min Zhang
;
Yanbiao Liao
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