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检索条件"主题词=em algorithm"
4518 条 记 录,以下是3951-3960 订阅
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Statistical inference for serial dilution assay data
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BIOMETRICS 1999年 第4期55卷 1215-1220页
作者: Lee, MLT Whitmore, GA Brigham & Womens Hosp Channing Lab Boston MA 02115 USA Massachusetts Gen Hosp Ctr Biostat Boston MA USA Harvard Univ Sch Med Boston MA USA McGill Univ Fac Management Montreal PQ H3A 1G5 Canada
Serial dilution assays are widely employed for estimating substance concentrations and minimum inhibitory concentrations. The Poisson-Bernoulli model for such assays is appropriate for count data but not for continuou... 详细信息
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Learning Bayesian networks for clustering by means of constructive induction
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PATTERN RECOGNITION LETTERS 1999年 第11-13期20卷 1219-1230页
作者: Peña, JM Lozano, JA Larrañaga, P Univ Basque Country Dept Comp Sci & Artificial Intelligence Intelligent Syst Grp E-20080 San Sebastian Spain
The purpose of this paper is to present and evaluate a heuristic algorithm for learning Bayesian networks for clustering. Our approach is based upon improving the Naive-Bayes model by means of constructive induction. ... 详细信息
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Discrete-time nonparametric estimation for semi-Markov models of chain-of-events data subject to interval censoring and truncation
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BIOMETRICS 1999年 第2期55卷 514-522页
作者: Sternberg, MR Satten, GA Emory Univ Rollins Sch Publ Hlth Dept Biostat Atlanta GA 30322 USA Ctr Dis Control & Prevent Natl Ctr HIV STD & TB Prevent Div HIV AIDS Prevent Surveillance & Epidemiol Atlanta GA USA
Chain-of-events data are longitudinal observations on a succession of events that can only occur in a prescribed order. One goal in an analysis of this type of data is to determine the distribution of times between th... 详细信息
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Growing Gaussian mixtures network for classification applications
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SIGNAL PROCESSING 1999年 第1期76卷 43-60页
作者: Alba, JL Docío, L Docampo, D Márquez, OW ETSI Telecommun Dept Tecnol Cominicac Vigo 36200 Spain
In this paper a method to automatically generate a Gaussian mixture classifier is presented. The growing process is based on the iterative addition of Gaussian nodes. Each iteration takes place in two sequential steps... 详细信息
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Statistical signal restoration with 1/f wavelet domain prior models
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SIGNAL PROCESSING 1999年 第3期78卷 289-307页
作者: Dufour, RM Miller, EL Northeastern Univ Dept Elect & Comp Engn Commun & Digital Signal Proc Ctr Boston MA 02115 USA
In this paper we examine the problem of estimating a stochastic signal from noise corrupted linearly distorted samples of the original. Due to the ill-posedness caused by the blurring function, we are motivated to exa... 详细信息
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Mixed effects models with censored data with application to HIV RNA levels
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BIOMETRICS 1999年 第2期55卷 625-629页
作者: Hughes, JP Univ Washington Dept Biostat Seattle WA 98195 USA
Mixed effects models are often used for estimating fixed effects and variance components in longitudinal studies of continuous data. When the outcome being modelled is a laboratory measurement, however, it may be subj... 详细信息
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Allowing for missing parents in genetic studies of case-parent triads
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AMERICAN JOURNAL OF HUMAN GENETICS 1999年 第4期64卷 1186-1193页
作者: Weinberg, CR NIEHS Res Triangle Pk NC 27709 USA
In earlier work, my colleagues and I described a loglinear model for genetic data from triads composed of affected probands and their parents. This model allows detection of and discrimination between effects of an in... 详细信息
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Local dimensionality reduction
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COMPUTATIONAL STATISTICS 1999年 第4期14卷 469-489页
作者: Marchette, DJ Poston, WL USN Computat Stat Grp Ctr Surface Warfare Dahlgren VA 22448 USA USN Adv Processors Grp Ctr Surface Warfare Dahlgren VA 22448 USA
In automatic pattern recognition applications, numerous features that describe the classes are obtained in an attempt to ensure accurate classification of unknown observations. These features or dimensions must be red... 详细信息
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Missing covariates in generalized linear models when the missing data mechanism is non-ignorable
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JOURNAL OF THE ROYAL STATISTICAL SOCIETY SERIES B-STATISTICAL METHODOLOGY 1999年 第1期61卷 173-190页
作者: Ibrahim, JG Lipsitz, SR Harvard Univ Sch Publ Hlth Dept Biostat Boston MA 02115 USA Dana Farber Canc Inst Boston MA 02115 USA Worcester Polytech Inst Worcester MA 01609 USA
We propose a method for estimating parameters in generalized linear models with missing covariates and a non-ignorable missing data mechanism. We use a multinomial model for the missing data indicators and propose a j... 详细信息
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A pharmacokinetic model for tenidap in normal volunteers and rheumatoid arthritis patients
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PHARMACEUTICAL RESEARCH 1999年 第10期16卷 1608-1615页
作者: Evans, L Aarons, L Coates, P Univ Manchester Sch Pharm & Pharmaceut Sci Manchester Lancs England Pfizer Ltd Early Clin Res Sandwich CT13 9NJ Kent England
Purpose. To develop a pharmacokinetic model for tenidap and to identify important relationships between the pharmacokinetic parameters and available covariates. Methods. Plasma concentration data from several phase I ... 详细信息
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