Výsledky vyhledávání - "algoritmo EM"

Akademický článek

Modelo de regressao Weibull discreto com fracao de cura em dados de sobrevivencia

Autor: Carolina A. Silva, Cira E. G. Otiniano, Eduardo Y. Nakano

Publikováno v: Selecciones Matemáticas, Vol 6, Iss 1, Pp 84-97 (2019)

This paper presents a regression model for discrete time data with cure fraction. For this purpose, we considered a mixture model, in which times are modeled through the discrete Weibull distribution and the cure probability modeled with covariates b

Externí odkaz: https://doaj.org/article/923f01beee7e4f69a9cb037319885035

Zobrazit plný text záznamu

Akademický článek

Robust Mixture Regression Based on the Skew t Distribution

Autor: FATMA ZEHRA Doğru, OLCAY ARSLAN

Publikováno v: Revista Colombiana de Estadística, Vol 40, Iss 1, Pp 45-64 (2017)

In this study, we explore a robust mixture regression procedure based on the skew t distribution in order to model heavy-tailed and/or skewed errors in a mixture regression setting. We present an EM-type algorithm to compute the maximum likelihood es

Externí odkaz: https://doaj.org/article/80bc435813724b73baac0187371c0828

Zobrazit plný text záznamu

Developments in discrete latent variable models: dealing with likelihood multimodality and clustering of simple hypergraphs

Autor: BRUSA, LUCA

I modelli a variabili latenti forniscono un approccio statistico fondamentale per l'analisi di dati in molti campi diversi. Tra gli altri, citiamo la psicologia, la sociologia, l'economia, la medicina e l'ingegneria. La popolarità di questi modelli

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______1299::ec9a17bd1d2eef24886df3620769dd3e
https://hdl.handle.net/10281/405976

Zobrazit plný text záznamu

Akademický článek

Un algoritmo SAEM para el problema de completación de matrices

Autor: Anaís Frangeline Acuña Sosa, Jhonny Escalona Pérez

Publikováno v: Publicaciones en Ciencias y Tecnología, Vol 9, Iss 1, Pp 11-26 (2015)

En este trabajo estudiamos el problema de completación de matrices. Este problema se presenta en diversas áreas como la teoría de sistemas y control, procesamiento de imágenes y filtrado colaborativo. Considerando un modelo de factorización prob

Externí odkaz: https://doaj.org/article/1929169a465f495e9927e7562029ae24

Zobrazit plný text záznamu

Model-based estimation methods in the presence of missing data

Autor: Taís Roberta Ribeiro

Publikováno v: Repositório Institucional da UFSCAR
Universidade Federal de São Carlos (UFSCAR)
instacron:UFSCAR
Biblioteca Digital de Teses e Dissertações da USP
Universidade de São Paulo (USP)
instacron:USP

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) The missing data are observations that should have been made, but were not for some reason, thus reducing the ability to understand the nature of the phenomenon, in addition to m

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a7e2ccc87b097fd592724674ae77030d
https://repositorio.ufscar.br/handle/ufscar/17030.

Zobrazit plný text záznamu

Dissertation/ Thesis

Modelos de mistura para dados com distribuições Poisson truncadas no zero

Autor: Gigante, Andressa do Carmo

Modelo de mistura de distribuições tem sido utilizado desde longa data, mas ganhou maior atenção recentemente devido ao desenvolvimento de métodos de estimação mais eficientes. Nesta dissertação, o modelo de mistura foi utilizado como uma fo

Externí odkaz: http://www.teses.usp.br/teses/disponiveis/104/104131/tde-31012018-163048/

Zobrazit plný text záznamu

Dissertation/ Thesis

Inferência em modelos de mistura via algoritmo EM estocástico modificado

Autor: Assis, Raul Caram de

Apresentamos o tópico e a teoria de Modelos de Mistura de Distribuições, revendo aspectos teóricos e interpretações de tais misturas. Desenvolvemos a teoria dos modelos nos contextos de máxima verossimilhança e de inferência bayesiana. Abord

Externí odkaz: http://www.teses.usp.br/teses/disponiveis/104/104131/tde-11092017-093254/

Zobrazit plný text záznamu

Akademický článek

Multivariate skew-normal/independent distributions: properties and inference

Autor: Lachos, Victor H., Labra, Filidor V.

Publikováno v: Pro Mathematica. 28(56):11-53

Liu (1996) discussed a class of robust normal/independent distributions which contains a group of thick-tailed cases. In this article, we develop a skewed version of these distributions in the multivariate setting, and we call them multivariate skew

Externí odkaz: http://revistas.pucp.edu.pe/index.php/promathematica/article/view/11234/11746
http://repositorio.pucp.edu.pe/index/handle/123456789/97108

Zobrazit plný text záznamu

Akademický článek

Inference for the Weibull Distribution Based on Fuzzy Data

Autor: ABBAS PAK, GHOLAM ALI PARHAM, MANSOUR SARAJ

Publikováno v: Revista Colombiana de Estadística, Vol 36, Iss 2, Pp 337-356 (2013)

Classical estimation procedures for the parameters of Weibull distribution are based on precise data. It is usually assumed that observed data are precise real numbers. However, some collected data might be imprecise and are represented in the form o

Externí odkaz: https://doaj.org/article/0e408ddcb692431ea0c60785820e877c

Zobrazit plný text záznamu

Akademický článek

An Empirical Comparison of EM Initialization Methods and Model Choice Criteria for Mixtures of Skew-Normal Distributions Una comparación empírica de algunos métodos de inicialización EM y criterios de selección de modelos para mezclas de distribuciones normales asimetricas

Autor: JOSÉ R. PEREIRA, LEYNE A. MARQUES, JOSÉ M. DA COSTA

Publikováno v: Revista Colombiana de Estadística, Vol 35, Iss 3, Pp 457-478 (2012)

We investigate, via simulation study, the performance of the EM algorithm for maximum likelihood estimation in finite mixtures of skew-normal distributions with component specific parameters. The study takes into account the initialization method, th

Externí odkaz: https://doaj.org/article/21e5ae8c50c54e6e8eb6a12f7857dc7b

Zobrazit plný text záznamu

Vyhledávací nástroje:

Upřesnit hledání