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检索条件"主题词=em algorithm"
4575 条 记 录,以下是3951-3960 订阅
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Maximum-likelihood array processing in non-Gaussian noise with Gaussian mixtures
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IEEE TRANSACTIONS ON SIGNAL PROCESSING 2000年 第12期48卷 3520-3535页
作者: Kozick, RJ Sadler, BM Bucknell Univ Dept Elect Engn Lewisburg PA 17837 USA AMSRL CI CN Army Res Lab Adelphi MD 20783 USA
Many approaches have been studied for the array processing problem when the additive noise is modeled with a Gaussian distribution, but these schemes typically perform poorly when the noise is non-Gaussian and/or impu... 详细信息
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Finding curvilinear features in spatial point patterns: Principal curve clustering with noise
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IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE 2000年 第6期22卷 601-609页
作者: Stanford, DC Raftery, AE Mathsoft Inc Seattle WA 98109 USA Univ Washington Dept Stat Seattle WA 98195 USA
Clustering about principal curves combines parametric modeling of noise with nonparametric modeling of feature shape. This is useful for detecting curvilinear features in spatial point patterns, with or without backgr... 详细信息
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On a mixture autoregressive model
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JOURNAL OF THE ROYAL STATISTICAL SOCIETY SERIES B-STATISTICAL METHODOLOGY 2000年 第1期62卷 95-115页
作者: Wong, CS Li, WK Univ Hong Kong Dept Stat Hong Kong Hong Kong Peoples R China
We generalize the Gaussian mixture transition distribution (GMTD) model introduced by Le and co-workers to the mixture autoregressive (MAR) model for the modelling of non-linear time series. The models consist of a mi... 详细信息
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Handling missing data in diaries of alcohol consumption
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JOURNAL OF THE ROYAL STATISTICAL SOCIETY SERIES A-STATISTICS IN SOCIETY 2000年 第3期163卷 381-402页
作者: Longford, NT Ely, M Hardy, R Wadsworth, MEJ De Montfort Univ Dept Med Stat Leicester LE1 9BH Leics England UCL London England
Missing data can rarely be avoided in large scale studies in which subjects are requested to complete questionnaires with many items. Analyses of such surveys are often based on the records with no missing items, resu... 详细信息
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Risk assessment for quantitative responses using a mixture model
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BIOMETRICS 2000年 第2期56卷 519-527页
作者: Razzaghi, M Kodell, RL Bloomsburg Univ Penn Dept Math Bloomsburg PA 17815 USA US FDA Natl Ctr Toxicol Res Jefferson AR 72079 USA
A problem that frequently occurs in biological experiments with laboratory animals is that some subjects are less susceptible to the treatment than others. A mixture model has traditionally been proposed to describe t... 详细信息
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Maximum likelihood parameter estimation from incomplete data via the sensitivity equations: The continuous-time case
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IEEE TRANSACTIONS ON AUTOMATIC CONTROL 2000年 第5期45卷 928-934页
作者: Charalambous, CD Logothetis, A Univ Ottawa Sch Informat Technol & Engn Ottawa ON K1N 6N5 Canada Royal Inst Technol Dept Signals Sensors & Syst S-10044 Stockholm Sweden
This paper is concerned with maximum likelihood (ML) parameter estimation of continuous-time nonlinear partially observed stochastic systems, via the expectation maximization (em) algorithm. It is shown that the em al... 详细信息
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Maximum likelihood estimation of K-distribution parameters via the expectation-maximization algorithm
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IEEE TRANSACTIONS ON SIGNAL PROCESSING 2000年 第12期48卷 3303-3306页
作者: Roberts, WJJ Furui, S Tokyo Inst Technol Tokyo 152 Japan Tokyo Inst Technol Dept Comp Sci Tokyo 152 Japan
Maximum likelihood (ML) estimates of K-distribution parameters are derived using the expectation maximization (em) approach, This approach demonstrates computational advantages compared with 2-D numerical maximization... 详细信息
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Estimation of toxicokinetic parameters in population models for inhalation studies with ethylene
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ENVIRONMETRICS 2000年 第4期11卷 479-495页
作者: Selinski, S Golka, K Bolt, HM Urfer, W Univ Dortmund Dept Stat D-44221 Dortmund Germany Univ Dortmund Inst Occupat Physiol D-44139 Dortmund Germany
The determination of toxicokinetic parameters is an essential component in the risk assessment of potential harmful chemicals. It is a key step to analyse the processes involved in the formation of DNA adducts which a... 详细信息
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An adaptive receiver with an antenna array for channels with correlated non-Gaussian interference and noise using the SAGE algorithm
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IEEE TRANSACTIONS ON SIGNAL PROCESSING 2000年 第7期48卷 2172-2175页
作者: Zhang, YM Blum, RS Lehigh Univ Dept Elect Engn & Comp Sci Bethlehem PA 18015 USA
An adaptive receiver that uses multiple antennas to provide diversity against fading is developed for operation in an impulsive noise environment. The noise components at each sensor are assumed to be correlated. A mi... 详细信息
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Nonparametric maximum likelihood estimation for artificially truncated absence data
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COMMUNICATIONS IN STATISTICS-THEORY AND METHODS 2000年 第11期29卷 2439-2457页
作者: McClean, S Devine, C Univ Ulster Sch Informat & Softwar Engn Fac Informat Coleraine BT52 1SA Londonderry North Ireland
In manpower planning it is commonly the case that employees withdraw from active service for a period of time before returning to take up post at a later date. Such periods of absence are frequently of major concern t... 详细信息
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