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检索条件"主题词=expectation-maximisation algorithm"
493 条 记 录,以下是451-460 订阅
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Total variation norm for three-dimensional iterative reconstruction in limited view angle tomography
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PHYSICS IN MEDICINE AND BIOLOGY 2001年 第3期46卷 853-866页
作者: Persson, M Bone, D Elmqvist, H Karolinska Inst Dept Med Engn S-14186 Huddinge Sweden
An iterative Bayesian reconstruction algorithm for limited view angle tomography, or ectomography, based on the three-dimensional total variation (TV) norm has been developed. The TV norm has been described ill the li... 详细信息
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Analysis of change in the presence of informative censoring: application to a longitudinal clinical trial of progressive renal disease
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STATISTICS IN MEDICINE 2001年 第7期20卷 989-1007页
作者: Schluchter, MD Greene, T Beck, GJ Case Western Reserve Univ Rainbow Babies & Childrens Hosp Dept Pediat Div Clin Epidemiol & Biostat Cleveland OH 44106 USA Cleveland Clin Fdn Dept Biostat & Epidemiol Cleveland OH 44195 USA
The rate of change in a continuous variable, measured serially over time, is often used as an outcome in longitudinal studies or clinical trials. When patients terminate the study before the scheduled end of the study... 详细信息
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Estimating odds ratios adjusting for misclassification in Alzheimer's disease risk factor assessment
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STATISTICS IN MEDICINE 2000年 第11-12期19卷 1523-1530页
作者: Emsley, CL Gao, S Hall, KS Hendrie, HC Indiana Univ Sch Med Div Biostat Indianapolis IN 46202 USA Indiana Univ Sch Med Dept Psychiat Indianapolis IN 46202 USA
Epidemiological studies of Alzheimer's disease and dementia are often two-phase studies including a screening phase and a clinical assessment phase. It is common to interview a relative of the subject at each of t... 详细信息
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Characterization of transient wandering tones by dynamic modeling of fractional-Fourier features  25
Characterization of transient wandering tones by dynamic mod...
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IEEE International Conference on Acoustics, Speech, and Signal Processing
作者: Ainsleigh, PL Kehtarnavaz, N USN Undersea Warfare Ctr Newport RI 02841 USA
A novel approach is presented for characterizing transient wandering tones. These signals ale segmented and approximated as time series with piecewise linear instantaneous frequency and piecewise constant amplitude. F... 详细信息
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A robust predominant-F0 estimation method for real-time detection of melody and bass lines in CD recordings  25
A robust predominant-F0 estimation method for real-time dete...
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IEEE International Conference on Acoustics, Speech, and Signal Processing
作者: Goto, M Electrotech Lab Tsukuba Ibaraki 3058568 Japan
This paper describes a robust method for estimating the fundamental frequency (F0) of melody and bass lines in monaural real-world musical audio signals containing sounds of various instruments. Most previous F0-estim... 详细信息
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Recent developments in iterative image reconstruction for PET and SPECT
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IEEE TRANSACTIONS ON MEDICAL IMAGING 2000年 第4期19卷 257-260页
作者: Leahy, R Byrne, C Univ So Calif Dept Elect Engn Syst Los Angeles CA 90089 USA Univ So Calif Inst Signal & Image Proc Los Angeles CA 90089 USA Univ So Calif Dept Radiol Los Angeles CA USA Univ So Calif Dept Biomed Engn Los Angeles CA 90089 USA
Introduces a series of articles on the developments in iterative image reconstruction for positron-emission tomography (PET) and single proton emission computer tomography (SPECT).
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Markov chain Monte Carlo data association for target tracking  25
Markov chain Monte Carlo data association for target trackin...
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IEEE International Conference on Acoustics, Speech, and Signal Processing
作者: Bergman, N Doucet, A Linkoping Univ Dept Elect Engn Div Automat Control SE-58183 Linkoping Sweden
We consider the estimation of the state of a discrete-time Markov process using observations which are sets of measurements from a finite number of known linear models. The measurement to model association is unknown ... 详细信息
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Kernel expansions with unlabeled examples  00
Kernel expansions with unlabeled examples
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Annual Conference on Neural Information Processing Systems
作者: Tommi Jaakkola Martin Szummer MIT AI Lab & CBCL Cambridge MA
Modern classification applications necessitate supplementing the few available labeled examples with unlabeled examples to improve classification performance. We present a new tractable algorithm for exploiting unlabe... 详细信息
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Using missing data methods in genetic studies with missing mutation status
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STATISTICS IN MEDICINE 1999年 第4期18卷 473-485页
作者: Leong, T Lipsitz, SR Ibrahim, JG Dana Farber Canc Inst Dept Biostat Sci Boston MA 02115 USA Harvard Univ Sch Publ Hlth Dept Biostat Boston MA 02115 USA
Because of current techniques of determining gene mutation, investigators are now interested in estimating the odds ratio between genetic status (mutation, no mutation) and an outcome variable such as disease cell typ... 详细信息
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Is the AIDS incubation time changing? A back-calculation approach
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STATISTICS IN MEDICINE 1999年 第9期18卷 1031-1047页
作者: Deuffic, S Costagliola, D Fac Med St Antoine INSERM Unite Rech Epidemiol & Sci Informat F-75571 Paris 12 France Fac Med St Antoine INSERM U4444 Unite Rech Epidemiol & Sci Informat F-75571 Paris France
Contradictory literature was recently published on possible changes in AIDS incubation time over the period 1978-1994. The purpose of this work was to test if a change in incubation time (shortening or lengthening) wa... 详细信息
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