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浏览/检索结果: 共4条，第1-4条 帮助 已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择发表日期升序发表日期降序作者升序作者降序提交时间升序提交时间降序题名升序题名降序 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] 收藏  |  浏览/下载：2/0  |  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. 收藏  |  浏览/下载：18/0  |  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. 收藏  |  浏览/下载：36/0  |  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 收藏  |  浏览/下载：2/0