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检索条件"主题词=Expectation-Maximization Algorithm"
627 条 记 录,以下是581-590 订阅
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On the use of DNA pooling to estimate haplotype frequencies
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GENETIC EPIDEMIOLOGY 2003年 第1期24卷 74-82页
作者: Wang, S Kidd, KK Zhao, HY Yale Univ Sch Med Dept Epidemiol & Publ Hlth New Haven CT 06520 USA Yale Univ Sch Med Dept Genet New Haven CT 06510 USA
Genome-wide association studies may be necessary to identify genes underlying certain complex diseases. Because such studies can be extremely expensive, DNA pooling has been introduced, as it may greatly reduce the ge... 详细信息
来源: 评论
An EM algorithm for wavelet-based image restoration
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IEEE TRANSACTIONS ON IMAGE PROCESSING 2003年 第8期12卷 906-916页
作者: Figueiredo, MAT Nowak, RD Inst Super Tecn Inst Telecommun P-1049001 Lisbon Portugal Inst Super Tecn Dept Elect & Comp Engn P-1049001 Lisbon Portugal Rice Univ Dept Elect & Comp Engn Houston TX 77001 USA
This paper introduces an expectation-maximization (EM) algorithm for image restoration (deconvolution) based on a penalized likelihood formulated in the wavelet domain. Regularization is achieved by promoting a recons... 详细信息
来源: 评论
A theoretical assessment of image analysis: Statistical vs structural approaches
A theoretical assessment of image analysis: Statistical vs s...
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Medical Imaging 2003 Conference
作者: Lei, TH Udupa, JK Univ Penn Dept Radiol MIPG Philadelphia PA 19104 USA
Statistical and structural methods axe two major approaches commonly used in image analysis and have demonstrated considerable success. The former is based on statistical properties and stochastic models of the image ... 详细信息
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A simple channel estimator for OFDM with transmit diversity in rapid fading channels
A simple channel estimator for OFDM with transmit diversity ...
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14th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications
作者: Shan, SW Luo, HW Song, WT Shanghai Jiao Tong Univ Dept Elect Engn Shanghai 200030 Peoples R China
This paper presents a simple channel estimator for orthogonal frequency division multiplexing (OFDM) systems with transmit diversity in rapid fading channels. The channels at the training bauds are estimated using the... 详细信息
来源: 评论
Unsupervised learning of finite mixture models
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IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE 2002年 第3期24卷 381-396页
作者: Figueiredo, MAT Jain, AK Inst Super Tecn Inst Telecommun P-1049001 Lisbon Portugal Inst Super Tecn Dept Elect & Comp Engn P-1049001 Lisbon Portugal Michigan State Univ Dept Comp Sci & Engn E Lansing MI 48824 USA
This paper proposes an unsupervised algorithm for learning a finite mixture model from multivariate data. The adjective "unsupervised" is justified by two properties of the algorithm: 1) it is capable of sel... 详细信息
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Genomewide motif identification using a dictionary model
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PROCEEDINGS OF THE IEEE 2002年 第11期90卷 1803-1810页
作者: Sabatti, C Lange, K Univ Calif Los Angeles Dept Human Genet Los Angeles CA 90095 USA Univ Calif Los Angeles Biomath Dept Los Angeles CA 90095 USA Univ Calif Los Angeles Dept Stat Los Angeles CA 90095 USA
This paper surveys and extends models and algorithms for identifying binding sites in noncoding regions of DNA. Binding sites control the transcription of genes into messenger RNA in preparation for translation into p... 详细信息
来源: 评论
Unsupervised change-detection methods for remote-sensing images
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OPTICAL ENGINEERING 2002年 第12期41卷 3288-3297页
作者: Melgani, F Moser, G Serpico, SB Univ Trent Dept Informat & Commun Technol I-38050 Trento Italy Univ Genoa Dept Biophys & Elect Engn I-16145 Genoa Italy
An unsupervised change detection problem can be viewed as a classification problem with only two classes corresponding to the change and no-change areas, respectively. Thanks to its simplicity, image differencing is a... 详细信息
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An adaptive semiparametric and context-based approach to unsupervised change detection in multitemporal remote-sensing images
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IEEE TRANSACTIONS ON IMAGE PROCESSING 2002年 第4期11卷 452-466页
作者: Bruzzone, L Prieto, DF Univ Trent Dept Informat & Commun Technol I-38050 Trento Italy
In this paper, a novel automatic approach to the unsupervised identification of changes in multitemporal remote-sensing images is proposed. This approach, unlike classical ones, is based on the formulation of the unsu... 详细信息
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Image coding using transform vector quantization with training set synthesis
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SIGNAL PROCESSING 2002年 第11期82卷 1649-1663页
作者: Comaniciu, D Grisel, R Siemens Corp Res Real Time Vis & Modeling Dept Princeton NJ 08540 USA CNRS EP 0092 CPE LISA F-69616 Villeurbanne France
A new paradigm that combines data modeling and vector quantization in an effective coding technique is presented. We fit a statistical model to the input data and use the best fit parameters to synthesize training vec... 详细信息
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Principal component analysis of dissolution data with missing elements
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INTERNATIONAL JOURNAL OF PHARMACEUTICS 2002年 第1-2期234卷 169-178页
作者: Adams, E Walczak, B Vervaet, C Risha, PG Massart, DL Free Univ Brussels Inst Pharmaceut B-1090 Brussels Belgium Silesian Univ Inst Chem PL-40006 Katowice Poland State Univ Ghent Lab Pharmaceut Technol B-9000 Ghent Belgium Muhimbili Univ Coll Hlth Sci Dar Es Salaam Tanzania
The use of principal component analysis (PCA) for incomplete dissolution data sets is examined. The PC space is constructed using a reference set and the test set is projected in that space. Several cases such as a re... 详细信息
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