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浏览/检索结果: 共5条，第1-5条 帮助 限定条件 内容类型：会议论文    专题：长春光学精密机械与物理研究所    第一署名单位    第一作者单位    通讯作者单位     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 Total solar irradiance monitors, space instruments for measuring total solar irradiance on FY-3 satellites 会议论文 Earth Observing Missions and Sensors: Development, Implementation, and Characterization III, October 13, 2014 - October 15, 2014, Beijing, China Wang H.; Wang Y.; Ye X.; Wang K.; Yang D.; Fang W.; Li H. 收藏  |  浏览/下载：14/0  |  提交时间：2015/04/27 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：17/0  |  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.   Electronic system design of ultraviolet ozone vertical profile probe for aerography satellite (EI CONFERENCE) 会议论文 2011 International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2011, August 12, 2011 - August 14, 2011, Harbin, China Song K.; Wang S. 收藏  |  浏览/下载：15/0  |  提交时间：2013/03/25 The design of ultraviolet ozone vertical profile probe is illustrated and the electronic system is introduced in detail. The device is a compact  high precision  ultraviolet-vacuum  ultraviolet spectral radiometer  and is used to measure atmospheric solar backscattering spectral radiance and solar spectral irradiance. Noise of the system is analyzed and Numeric accumulation and synchronous demodulation was used to decrease the noise and the zero-drift of the instrument. The solar irradiance at altitude 830 km in 160-400 nm and the backscattering solar spectral radiance in the ultraviolet ozone absorption band at 12 wavelengths from 250 nm to 340 nm are obtained. Test results on orbit show that all the requested function is met successfully and the performance is stable. 2011 IEEE.   Memoryless polynomial RLS adaptive filter for trajectory target tracking (EI CONFERENCE) 会议论文 2010 International Conference on Computer Modeling and Simulation, ICCMS 2010, January 22, 2010 - January 24, 2010, Sanya, China Cai R.; Wu Q.; Liu J.; Wu Y. 收藏  |  浏览/下载：15/0  |  提交时间：2013/03/25 In order to find an effective solution to trajectory target tracking  a memoryless polynomial adaptive filter is proposed in this paper. Unlike Volterra adaptive filter  the proposed memoryless polynomial filter is composed of different monomials  which can fit orbit trajectory very well. Besides  the memoryless polynomial filter can be separated into a linearization filter and a transversal filter. Analogous to linear RLS adaptive filter  a RLS adaptive filter is derived from the memoryless polynomial filter  called Memoryless polynomial RLS adaptive filter (MLPRLS adaptive filter). Experiments show that the proposed filters have better performance than that of normal RLS filters in trajectory tracking. 2010 IEEE.   Memoryless polynomial LMS adaptive filter for orbit object tracking (EI CONFERENCE) 会议论文 2009 International Conference on Information Engineering and Computer Science, ICIECS 2009, December 19, 2009 - December 20, 2009, Wuhan, China Cai R.; Wu Q.; Wang P.; Wang M.; Wu Y. 收藏  |  浏览/下载：12/0  |  提交时间：2013/03/25 In order to find a fast and effective solution to orbit object tracking  a memoryless polynomial adaptive filter is proposed in this paper. Unlike Volterra adaptive filter  the proposed filter is composed of polynomials in different orders  which can fit normal orbit trajectory well. A memoryless polynomial filter (MLF) is designed first. The designed memoryless polynomial filter can be separated into a linearization filter and a FIR filter. Analogous to linear LMS adaptive filter  a LMS adaptive algorithm is derived for the memoryless polynomial filter  which is called Memoryless polynomial LMS adaptive filter (MLPLMS adaptive filter). Experiments show that the proposed filter has better performance than that of a normal LMS filter on orbit tracking. 2009 IEEE.