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检索条件"主题词=expectation-maximisation algorithm"
495 条 记 录,以下是81-90 订阅
排序:
Ultra wideband OFDM channel estimation through a wavelet based EM-MAP algorithm
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EUROPEAN TRANSACTIONS ON TELECOMMUNICATIONS 2008年 第7期19卷 761-771页
作者: Sadough, S. M. S. Ichir, M. Duhamel, P. Jaffrot, E. ENSTA UEI F-75015 Paris France CNRS Supelec Signaux & Syst Lab F-91190 Gif Sur Yvette France Univ Nacl San Marin Pcia De Buenos Aires Argentina
Ultra wideband (UWB) communications involve very sparse channels, since the bandwidth increase results in a better time resolution. This property is used here to propose an efficient algorithm jointly estimating the c... 详细信息
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CapsNet topology to classify tumours from brain images and comparative evaluation
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IET IMAGE PROCESSING 2020年 第5期14卷 882-889页
作者: Goceri, Evgin Akdeniz Univ Dept Biomed Engn Antalya Turkey
Visual evaluation of many magnetic resonance images is a difficult task. Therefore, computer-assisted brain tumor classification techniques have been proposed. These techniques have several drawbacks or limitations. C... 详细信息
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Dynamic texture classification using Gumbel mixtures in the complex wavelet domain
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IET IMAGE PROCESSING 2019年 第1期13卷 9-14页
作者: Qiao, Yulong Liu, Qiufei Liu, Wenhui Harbin Engn Univ Coll Informat & Commun Engn Harbin Heilongjiang Peoples R China
Dynamic texture (DT) classification has attracted extensive attention in the field of image sequence analysis. The probability distribution model, which has been used to analysis DT, can describe well the distribution... 详细信息
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Bayesian generalised likelihood ratio test-based multiple antenna spectrum sensing for cognitive radios
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IET COMMUNICATIONS 2013年 第18期7卷 2151-2165页
作者: Sedighi, Saeid Taherpour, Abbas Monfared, Shaghayegh S. M. Imam Khomeini Int Univ Dept Elect Engn Qazvin Iran
In this study, the authors address the problem of multiple antenna spectrum sensing in cognitive radios by exploiting the prior information about unknown parameters. Specifically, under assumption that unknown paramet... 详细信息
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Quantitative simultaneous 99mTc/123I cardiac SPECT using MC-JOSEM
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MEDICAL PHYSICS 2009年 第2期36卷 602-611页
作者: Ouyang, Jinsong Zhu, Xuping Trott, Cathryn M. El Fakhri, Georges Massachusetts Gen Hosp Div Nucl Med & Mol Imaging Boston MA 02114 USA Harvard Univ Sch Med Dept Radiol Boston MA 02115 USA
Simultaneous rest Tc-99m-Sestamibi/I-123-BMIPP cardiac SPECT imaging has the potential to replace current clinical Tc-99m-Sestamibi rest/stress imaging and therefore has great potential in the case of patients with ch... 详细信息
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Soft shape registration under Lie group frame
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IET COMPUTER VISION 2013年 第6期7卷 437-447页
作者: Peng, Yaxin Lin, Wei Ying, Shihui Peng, Jigen Shanghai Univ Sch Sci Dept Math Shanghai 200444 Peoples R China Xi An Jiao Tong Univ Sch Math & Stat Inst Informat & Syst Sci Xian 710049 Peoples R China
In this study, the authors address a two-dimensional (2D) shape registration problem on data with anisotropic-scale deformation and noise. First, the model is formulated under the iterative closest point (ICP) framewo... 详细信息
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Modeling of Video Sequences by Gaussian Mixture: Application in Motion Estimation by Block Matching Method
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EURASIP JOURNAL ON ADVANCES IN SIGNAL PROCESSING 2010年 第1期2010卷 1-8页
作者: Boudlal, Abdenaceur Nsiri, Benayad Aboutajdine, Driss Univ Hassan II Ain Chock LPMMAT Fac Sci Ain Chock Casablanca 20100 Morocco Univ Mohammed V Agdal Fac Sci LRIT Lab Associated CNRST Rabat 10080 Morocco
This article investigates a new method of motion estimation based on block matching criterion through the modeling of image blocks by a mixture of two and three Gaussian distributions. Mixture parameters (weights, mea... 详细信息
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A latent variable regression model for capture-recapture data
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COMPUTATIONAL STATISTICS & DATA ANALYSIS 2009年 第7期53卷 2740-2746页
作者: Thandrayen, Joanne Wang, Yan Univ S Australia Sch Math & Stat Adelaide SA 5000 Australia RMIT Univ Sch Math & Geospatial Sci Melbourne Vic 3000 Australia
Capture-recapture methods are used to estimate the prevalence of diseases in the field of epidemiology. The information used for estimation purposes are available from multiple lists, whereby giving rise to the proble... 详细信息
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Synthetic aperture radar image segmentation with quantum annealing
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IET RADAR SONAR AND NAVIGATION 2024年 第5期18卷 812-824页
作者: Presles, Timothe Enderli, Cyrille Burel, Gilles Baghious, El Houssain Thales Def Mission Syst Elancourt France Univ Brest CNRS UMR6285 STICCCyber IOT ChairLab Brest France
In image processing, image segmentation is the process of partitioning a digital image into multiple image segments. Among state-of-the-art methods, Markov random fields can be used to model dependencies between pixel... 详细信息
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Effects of shortened acquisition time on accuracy and precision of quantitative estimates of organ activity
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MEDICAL PHYSICS 2010年 第4期37卷 1807-1815页
作者: He, Bin Frey, Eric C. Cornell Univ Dept Radiol Div Nucl Med New York Presbyterian HospWeill Med Coll New York NY 10021 USA Johns Hopkins Med Inst Russell H Morgan Dept Radiol & Radiol Sci Baltimore MD 21287 USA
Methods: To test this hypothesis, the authors compared the accuracy and variation in accuracy of organ activity estimates obtained from planar and SPECT scans at various count levels. A simulated phantom population wi... 详细信息
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