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• 光电子学 [10]
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浏览/检索结果: 共44条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 The detection method of sidelobe peaks parameter in weak signal regions based on NVPCA Image enhancement 会议论文  OAI收割 Beijing, China, 2023-07-25 作者:  Wang, Zhengzhou;  Wei, Jitong;  Wang, Li   |  收藏  |  浏览/下载：6/0  |  提交时间：2024/02/07 Far field measurement  NVPCA  Diffraction inversion of sidelobe beam  Angle transformation  Parameter detection of sidelobe peaks   Set-Membership Filtering Subject to Impulsive Measurement Outliers: A Recursive Algorithm 期刊论文  OAI收割 IEEE/CAA Journal of Automatica Sinica, 2021, 卷号: 8, 期号: 2, 页码: 377-388 作者:  Lei Zou;  Zidong Wang;  Hang Geng;  Xiaohui Liu   |  收藏  |  浏览/下载：25/0  |  提交时间：2021/04/09 Boundedness analysis  impulsive measurement outliers  parameter-dependent filter  set-membership filtering  time-varying systems   Uncertainties in above ground tree biomass estimation 期刊论文  OAI收割 JOURNAL OF FORESTRY RESEARCH, 2020, 页码: 12 作者:  Qin, Lihou;  Meng, Shengwang;  Zhou, Guang;  Liu, Qijing;  Xu, Zhenzhao   |  收藏  |  浏览/下载：42/0  |  提交时间：2021/03/16 Above-ground biomass  Measurement error  Residual variability  Parameter estimates  Sampling variability   Automatic Measurement of the Stellar Atmospheric Parameters Based Mass Estimation 期刊论文  OAI收割 SPECTROSCOPY AND SPECTRAL ANALYSIS, 2015, 卷号: 35, 期号: 11, 页码: 3204-3208 作者:  Tu Liang-ping;  Wei Hui-ming;  Luo A-li;  Zhao Yong-heng 收藏  |  浏览/下载：24/0  |  提交时间：2016/11/09 Stellar spectra  Parameter measurement  Mass estimation   EFFECTS OF NEW VISCOSITY MODEL ON COSMOLOGICAL EVOLUTION 期刊论文  OAI收割 MODERN PHYSICS LETTERS A, 2014, 卷号: 29, 期号: 3, 页码: 1450009 Wang, JX; Meng, XH 收藏  |  浏览/下载：110/0  |  提交时间：2014/04/25 BARYON ACOUSTIC-OSCILLATIONS  PARAMETER MEASUREMENT CONSTRAINTS  DARK ENERGY  BULK VISCOSITY  REDSHIFT  EQUATION  STATE   Quantum state measurement in double quantum dots with a radio-frequency quantum point contact 期刊论文  OAI收割 CHINESE PHYSICS B, 2014, 卷号: 23, 期号: 2 Yan, L; Wang, HX; Yin, W; Wang, FW 收藏  |  浏览/下载：26/0  |  提交时间：2015/04/14 measurement  quantum state  output voltage  circuit parameter   Analysis on Structural Parameters of Binocular Stereo Vision System 期刊论文  OAI收割 Applied Mechanics and Materials, 2013, 卷号: 437, 页码: 290-295 - 收藏  |  浏览/下载：17/0  |  提交时间：2016/05/16 Baseline  Binocular Stereo Vision  Measurement Accuracy  Structural Parameter   Error analysis of the micro temperature control system (EI CONFERENCE) 会议论文  OAI收割 2012 International Conference on Measurement, Instrumentation and Automation, ICMIA 2012, September 15, 2012 - September 16, 2012, Guangzhou, China Han Z.; Song K. 收藏  |  浏览/下载：48/0  |  提交时间：2013/03/25 In order to improve the measurement accuracy of optical detection instruments  temperature control circuits for narrow band-pass filters are given  and the error analysis is applied to temperature control circuits.The principle of a temperature measurement circuit is studied and the method of a driver circuit is described. A variety of influencing factors of temperature control accuracy are discussed. Moreover  for these error factors  improvement measures are given to reduce the nonlinear error. Finally  circuit parameter error is quantified to propose a calculation method for margin of error in a temperature control system. (2013) Trans Tech Publications  Switzerland.   Animated models coarsening with local area distortion and deformation degree control (EI CONFERENCE) 会议论文  OAI收割 International Conference on Image Processing and Pattern Recognition in Industrial Engineering, August 7, 2010 - August 8, 2010, Xi'an, China 作者:  Zhang S.;  Zhao J. 收藏  |  浏览/下载：22/0  |  提交时间：2013/03/25 In computer graphics applications  mesh coarsening is an important technique to alleviate the workload of visualization processing. Compared to the extensive works on static model approximation  very little attentions have been paid to animated models. In this paper  we propose a new method to approximate animated models with local area distortion and deformation degree control. Our method uses an improved quadric error metric guided by a local area distortion measurement as a basic hierarchy. Also  we define a deformation degree parameter to be embedded into the aggregated quadric errors  so areas with large deformation during the animation can be successfully preserved. Finally  a mesh optimization process is proposed to further reduce the geometric distortion for each frame. Our approach is fast  easy to implement  and as a result good quality dynamic approximations with well-preserved sharp features can be generated at any given frame. 2010 SPIE.   Modulation transfer function measurement of sampled imaging systems in field test (EI CONFERENCE) 会议论文  OAI收割 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, April 26, 2010 - April 29, 2010, Dalian, China 作者:  Yang L.;  Zhang J.;  Zhang J.;  Zhang J.;  Wang J. 收藏  |  浏览/下载：27/0  |  提交时间：2013/03/25 A digital mirror device (DMD) based light projector was developed as the target generator in modulation transfer function (MTF) measurement. In order to overcome the sampling-scene phase effect in MTF measurement of sampled imaging systems  a method using random targets is introduced to yield a phase-averaged MTF. The main potential problem of implementing this method is the fact that the stationary assumption of the random targets may be vitiated in practical measurement  especially in field test due to the ill condition. We provide an efficient model-independent way of analyzing and isolating the spectral contents arising from these additional contributions to MTF measurement. Algorithms with adaptive parameter selection were also developed for spectral estimation of the test image in order to overcome the challenge brought by the size limit of the test matrices for one certain field of view derived from the isoplantic region. The MTF measurement of a CCD video imager is used to demonstrate the measurement technique and illustrate the benefits over other methods. In order to validate the results  comparisons have been made between MTF measurements of imager implemented using this method and bar target direct measurements. 2010 Copyright SPIE - The International Society for Optical Engineering.