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检索条件"主题词=em algorithm"
4566 条 记 录,以下是211-220 订阅
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Proportional rates models for multivariate panel count data
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BIOMETRICS 2024年 第1期80卷 ujad011页
作者: Xu, Yangjianchen Zeng, Donglin Lin, Dan-Yu Univ North Carolina Chapel Hill Dept Biostat Chapel Hill NC 27599 USA Univ N Carolina Dept Biostat Chapel Hill NC 27599 USA
Multivariate panel count data arise when there are multiple types of recurrent events, and the observation for each study subject consists of the number of recurrent events of each type between two successive examinat... 详细信息
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Estimation and inference for high dimensional factor model with regime switching
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JOURNAL OF ECONOMETRICS 2024年 第2期241卷
作者: Urga, Giovanni Wang, Fa Bayes Business Sch Cass Fac Finance 106 Bunhill Row London EC1Y 8TZ England Peking Univ Sch Econ 5 Yiheyuan Rd Beijing 100871 Peoples R China
This paper proposes maximum (quasi)likelihood estimation for high dimensional factor models with regime switching in the loadings. The model parameters are estimated jointly by the em (expectation maximization) algori... 详细信息
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Imperfect and worse than old maintenances for a gamma degradation process
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APPLIED STOCHASTIC MODELS IN BUSINESS AND INDUSTRY 2024年 第3期40卷 620-639页
作者: Corset, Franck Fouladirad, Mitra Paroissin, Christian Univ Grenoble Alpes CNRS LJK Grenoble France Aix Marseille Univ UMR CNRS 7340 Cenrale Med M2P2 Marseille France Univ Pau & Pays Adour CNRS LMAP E2S UPPA Pau France
This article considers a condition-based maintenance for a system subject to deterioration. The deterioration is modeled by a non-homogeneous gamma process, more precisely the gamma process and the preventive maintena... 详细信息
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emBRACE: An em-based bias reduction approach through Copas-model estimation for quantifying the evidence of selective publishing in network meta-analysis
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BIOMETRICS 2022年 第2期78卷 754-765页
作者: Marks-Anglin, Arielle Luo, Chongliang Piao, Jin Gibbons, Mary Beth Connolly Schmid, Christopher H. Ning, Jing Chen, Yong Univ Penn Dept Biostat Epidemiol & Informat Philadelphia PA 19104 USA Univ Southern Calif Dept Prevent Med Los Angeles CA 90007 USA Univ Penn Dept Psychiat Philadelphia PA 19104 USA Brown Univ Dept Biostat Providence RI 02912 USA Univ Texas MD Anderson Canc Ctr Dept Biostat Houston TX 77030 USA
Systematic reviews and meta-analyses synthesize results from well-conducted studies to optimize healthcare decision-making. Network meta-analysis (NMA) is particularly useful for improving precision, drawing new compa... 详细信息
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Rayleigh-Rice Mixture Parameter Estimation via em algorithm for Change Detection in Multispectral Images
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IEEE TRANSACTIONS ON IMAGE PROCESSING 2015年 第12期24卷 5004-5016页
作者: Zanetti, Massimo Bovolo, Francesca Bruzzone, Lorenzo Univ Trento Dept Informat & Commun Technol I-38123 Trento Italy Fdn Bruno Kessler Ctr Informat Technol I-38123 Trento Italy
The problem of estimating the parameters of a Rayleigh-Rice mixture density is often encountered in image analysis (e.g., remote sensing and medical image processing). In this paper, we address this general problem in... 详细信息
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Effect of a correlated competing risk on marginal survival estimation in an accelerated failure time model
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COMMUNICATIONS IN STATISTICS-SIMULATION AND COMPUTATION 2024年
作者: Gares, Valerie Hudson, Malcolm Manuguerra, Maurizio Gebski, Val Univ Rennes INSA CNRS IRMAR UMR 6625 Rennes France Univ Sydney NHMRC Clin Trials Ctr Camperdown Australia Macquarie Univ Sch Math & Phys Sci FSE Sydney Australia
In problems with a time to event outcome, subjects may experience competing events, which censor the outcome of interest. Cox's partial likelihood estimator treating competing events as independent censoring is co... 详细信息
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Variable selection for misclassified current status data under the proportional hazards model
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COMMUNICATIONS IN STATISTICS-SIMULATION AND COMPUTATION 2024年 第3期53卷 1494-1503页
作者: Wang, Wenshan Fang, Lijun Li, Shuwei Sun, Jianguo Jilin Univ Ctr Appl Stat Res Sch Math Changchun Peoples R China Guangzhou Univ Sch Econ & Stat Guangzhou 10006 Peoples R China Univ Missouri Dept Stat Columbia MO 65211 USA
Misclassified current status data arise when the failure time of interest is observed or known only to be either smaller or larger than an observation time rather than observed exactly, and the failure status is exami... 详细信息
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A Class of Hierarchical Multivariate Wiener Processes for Modeling Dependent Degradation Data
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TECHNOMETRICS 2024年 第2期66卷 141-156页
作者: Fang, Guanqi Pan, Rong Zhejiang Gongshang Univ Collaborat Innovat Ctr Stat Data Engn Technol & Ap Hangzhou Peoples R China Zhejiang Gongshang Univ Sch Stat & Math Hangzhou Peoples R China Arizona State Univ Sch Comp & Augmented Intelligence Tempe AZ USA Arizona State Univ Sch Comp & Augmented Intelligence Tempe AZ 85281 USA
In engineering practice, many products exhibit multiple and dependent degrading performance characteristics (PCs). It is common to observe that these PCs' initial measurements are nonconstant and sometimes correla... 详细信息
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em-based likelihood inference for one-shot device test data under log-normal lifetimes and the optimal design of a CSALT plan
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QUALITY AND RELIABILITY ENGINEERING INTERNATIONAL 2022年 第2期38卷 780-799页
作者: Balakrishnan, Narayanaswamy Castilla, Elena McMaster Univ Dept Math & Stat Hamilton ON Canada Univ Complutense Madrid Dept Stat & OR Madrid Spain
One-shot devices result in an extreme case of interval censoring, wherein one can only know whether the failure time is either before or after the test time. The study of one-shot device testing has been developed con... 详细信息
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Parameter-expanded ECME algorithms for logistic and penalized logistic regression
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COMPUTATIONAL STATISTICS 2025年 1-27页
作者: Henderson, Nicholas C. Ouyang, Zhongzhe Univ Michigan Dept Biostat 1415 Washington Hts Ann Arbor MI 48109 USA
Parameter estimation in logistic regression is a well-studied problem with the Newton-Raphson method being one of the most prominent optimization techniques used in practice. A number of monotone optimization methods ... 详细信息
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