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检索条件"主题词=expectation-maximization algorithm"
625 条 记 录,以下是221-230 订阅
排序:
Supervised learning of Gaussian mixture models for visual vocabulary generation
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PATTERN RECOGNITION 2012年 第2期45卷 897-907页
作者: Fernando, Basura Fromont, Elisa Muselet, Damien Sebban, Marc CNRS UMR 5516 Lab Hubert Curien F-42000 St Etienne France Univ St Etienne F-42000 St Etienne France Univ Lyon F-42023 St Etienne France
The creation of semantically relevant clusters is vital in bag-of-visual words models which are known to be very successful to achieve image classification tasks. Generally, unsupervised clustering algorithms, such as... 详细信息
来源: 评论
Modeling and predicting students' engagement behaviors using mixture Markov models
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KNOWLEDGE AND INFORMATION SYSTEMS 2022年 第5期64卷 1349-1384页
作者: Maqsood, Rabia Ceravolo, Paolo Romero, Cristobal Ventura, Sebastian Natl Univ Comp & Emerging Sci Dept Comp Sci Chiniot Faisalabad Campus Islamabad Pakistan Univ Milan Dept Comp Sci Milan Italy Univ Cordoba Dept Comp Sci & Numer Anal Cordoba Spain
Students' engagements reflect their level of involvement in an ongoing learning process which can be estimated through their interactions with a computer-based learning or assessment system. A pre-requirement for ... 详细信息
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Monthly stream flow forecasting via dynamic spatio-temporal models
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STOCHASTIC ENVIRONMENTAL RESEARCH AND RISK ASSESSMENT 2015年 第3期29卷 861-874页
作者: Dehghani, Majid Saghafian, Bahram Rivaz, Firoozeh Khodadadi, Ahmad Islamic Azad Univ Sci & Res Branch Tech & Engn Dept Tehran Iran Shahid Beheshti Univ Dept Math Tehran Iran
In this research, a dynamic linear spatio-temporal model (DLSTM) was developed and evaluated for monthly streamflow forecasting. For parameter estimation, coupled expectation-maximization (EM) algorithm and Kalman fil... 详细信息
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Trajectory Modeling of Longitudinal Binary Data: Application of the EM algorithm for Mixture Models
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COMMUNICATIONS IN STATISTICS-SIMULATION AND COMPUTATION 2014年 第3期43卷 495-519页
作者: Chu, Man-Kee M. Koval, John J. Univ Western Ontario Dept Stat & Actuarial Sci London ON N6A 5B7 Canada Univ Western Ontario Dept Epidemiol & Biostat London ON N6A 5B7 Canada
A developmental trajectory describes the course of behavior over time. Identifying multiple trajectories within an overall developmental process permits a focus on subgroups of particular interest. We introduce a fram... 详细信息
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Multivariate zero-inflated Bell distribution and its inference and applications
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APPLIED MATHEMATICAL MODELLING 2022年 103卷 543-556页
作者: Lemonte, Artur J. Univ Fed Rio Grande do Norte Dept Estat Natal RN Brazil
In this paper we introduce a multivariate family of distributions for multivariate count data with excess zeros, which is a multivariate extension of the univariate zero-inflated Bell distribution. We derive various g... 详细信息
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BICM Decoding of Jammed OFDM Transmissions Using the EM algorithm
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IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS 2011年 第9期10卷 2800-2806页
作者: Sanguinetti, Luca Morelli, Michele Poor, H. Vincent Univ Pisa Dept Informat Engn I-56126 Pisa Italy Princeton Univ Dept Elect Engn Princeton NJ 08544 USA
Wireless communications over unlicensed frequency bands are expected to suffer from significant co-channel interference, which inevitably limits the error-rate performance. In this letter, an orthogonal frequency-divi... 详细信息
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An Adaptive Harmonic Separation Technique for Ultrasound Harmonic Imaging
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ULTRASOUND IN MEDICINE AND BIOLOGY 2024年 第5期50卷 743-750页
作者: Yoon, Hansol Song, Tai-Kyong Sogang Univ Dept Elect Engn 35 Baekbeom Ro Seoul 04107 South Korea
Objective: An adaptive harmonic separation (HS) technique is proposed to overcome the limitations in conventional filtering techniques for ultrasound (US) tissue harmonic imaging (THI). Methods: Based on expectation -... 详细信息
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Multitask Classification by Learning the Task Relevance
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IEEE SIGNAL PROCESSING LETTERS 2008年 第1期15卷 593-596页
作者: Fang, Jun Ji, Shihao Xue, Ya Carin, Lawrence Duke Univ Dept Elect & Comp Engn Durham NC 27708 USA
We consider the problem of multitask learning (MTL), in which we simultaneously learn classifiers for multiple data sets (tasks), with sharing of intertask data as appropriate. We introduce a set of relevance paramete... 详细信息
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Joint channel estimation and symbol detection for space-time block code
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Journal of Systems Engineering and Electronics 2004年 第3期15卷 266-269页
作者: 单淑伟 罗汉文 宋文涛 DepartmentofElectronicEngineering ShanghaiJiaotongUniversityShanghai200030P.R.China
The simplified joint channel estimation and symbol detection based on the EM (expectation-maximization) algorithm for space-time block code (STBC) are proposed. By assuming channel to be invariant within only one STBC... 详细信息
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Variable Selection for Hidden Markov Models with Continuous Variables and Missing Data
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JOURNAL OF CLASSIFICATION 2024年 第3期41卷 568-589页
作者: Pennoni, Fulvia Bartolucci, Francesco Pandolfi, Silvia Univ Milano Bicocca Dept Stat & Quantitat Methods Via Bicocca Arcimboldi 8 I-20128 Milan Italy Univ Perugia Dept Econ Via A Pascoli 20 I-06123 Perugia Italy
We propose a variable selection method for multivariate hidden Markov models with continuous responses that are partially or completely missing at a given time occasion. Through this procedure, we achieve a dimensiona... 详细信息
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