Search results for "Uncertainty"

showing 10 items of 1010 documents

Inferencia Bayesiana sobre el coeficiente de variacion: Una solucion A la paradoja de marginalizacion

1977

En Inferencia Bayesiana, el uso indiscriminado de distribuciones iniciales impropias “no informativas” da lugar a ciertos resultados insatisfactorios conocidos como paradojas de marginalizacion. Utilizando un nuevo metodo para la construccion de distribuciones iniciales de referencia desarrollado por el autor, se ejemplifica la solucion de tales paradojas con el analisis del problema de inferencia planteado por el coeficiente de variacion.

Statistics and ProbabilityStatistics Probability and UncertaintyTrabajos de Estadistica Y de Investigacion Operativa
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Analisis de heuristicos para el problema del cartero rural

1985

En este articulo se estudia el comportamiento en el peor de los casos de dos algoritmos heuristicos propuestos para el Problema del Cartero Rural definido sobre un grafo no dirigido (RPP) y sobre un grafo dirigido (DRPP). En ambos problemas se determina el radio del peor caso de los heuristicos estudiados, que para el RPP es 3/2, mientras que para el DRPP no esta acotado. Para conseguir cotas que sean mas significativas, se ha determinado tambien este radio en funcion de ciertos parametros que se pueden calcular a partir de los datos particulares de cada ejemplo, lo que ha permitido obtener una cota finita para el comportamiento en el peor caso del algoritmo heuristico para el DRPP.

Statistics and ProbabilityStatistics Probability and UncertaintyTrabajos de Estadistica Y de Investigacion Operativa
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Bemerkungen zu einem Aufsatz von Wintgen: Einige Folgerungen für die wirtschaftstheoretischen und ökonometrischen Begriffe Modell und Struktur

1972

Statistics and ProbabilityStatistics Probability and UncertaintyStatistische Hefte
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Vitesse de convergence vers l'état d'équilibre pour des dynamiques markoviennes non höldériennes

1997

Resume On etudie la vitesse de convergence vers l'etat d'equilibre pour des dynamiques markoviennes non holderiennes. On obtient une estimation de la vitesse de melange sur un sous-espace B dense dans l'espace des fonctions continues. En outre, on montre que le spectre de l'operateur de Perron-Frobenius, restreint a B , est un disque ferme dont chaque point est une valeur propre. Ceci implique que la vitesse de convergence vers l'etat d'equilibre ne peut pas etre exponentielle.

Statistics and ProbabilityStatistics Probability and UncertaintyHumanitiesMathematicsAnnales de l'Institut Henri Poincare (B) Probability and Statistics
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Los Teoremas de Alternativa y su relacion con la Teoria de Juegos y las propiedades topologico-algebraicas de Rn

1976

Statistics and ProbabilityStatistics Probability and UncertaintyMathematicsTrabajos de Estadistica y de Investigacion Operativa
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Es usted… ¿Ortodoxo o Bayesiano?

1975

Statistics and ProbabilityStatistics Probability and UncertaintyMathematicsTrabajos de Estadistica y de Investigacion Operativa
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Mögliche Aussagen bei Fragen der statistischen Ursachenforschung

1971

Statistics and ProbabilityStatistics Probability and UncertaintyTheologyMathematicsMetrika
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Distribucion final de referencia para el problema de Fieller-Creasy

1982

The problem of making inferences about the ratio of two normal populations is usually known as the Fieller-Creasy problem, and it gave rise to a controversy among fiducialists and confidence-intervalists. A Bayesian solution to such a problem when the two normal populations have the same unknown variance was presented by Bernardo (1977) using reference non-informative prior distributions. The solution to the case in which the variances are not assumed equal is obtained here. Some numerical results for artificial populations are given

Statistics and ProbabilityStatisticsCalculusVariance (accounting)Statistics Probability and UncertaintyBayesian solutionMathematicsTrabajos de Estadistica y de Investigacion Operativa
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Selecting the tuning parameter in penalized Gaussian graphical models

2019

Penalized inference of Gaussian graphical models is a way to assess the conditional independence structure in multivariate problems. In this setting, the conditional independence structure, corresponding to a graph, is related to the choice of the tuning parameter, which determines the model complexity or degrees of freedom. There has been little research on the degrees of freedom for penalized Gaussian graphical models. In this paper, we propose an estimator of the degrees of freedom in $$\ell _1$$ -penalized Gaussian graphical models. Specifically, we derive an estimator inspired by the generalized information criterion and propose to use this estimator as the bias term for two informatio…

Statistics and ProbabilityStatistics::TheoryKullback–Leibler divergenceKullback-Leibler divergenceComputer scienceGaussianInformation Criteria010103 numerical & computational mathematicsModel complexityModel selection01 natural sciencesTheoretical Computer Science010104 statistics & probabilitysymbols.namesakeStatistics::Machine LearningGeneralized information criterionEntropy (information theory)Statistics::MethodologyGraphical model0101 mathematicsPenalized Likelihood Kullback-Leibler Divergence Model Complexity Model Selection Generalized Information Criterion.Model selectionEstimatorStatistics::ComputationComputational Theory and MathematicsConditional independencesymbolsPenalized likelihoodStatistics Probability and UncertaintySettore SECS-S/01 - StatisticaAlgorithmStatistics and Computing
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Clusters of effects curves in quantile regression models

2018

In this paper, we propose a new method for finding similarity of effects based on quantile regression models. Clustering of effects curves (CEC) techniques are applied to quantile regression coefficients, which are one-to-one functions of the order of the quantile. We adopt the quantile regression coefficients modeling (QRCM) framework to describe the functional form of the coefficient functions by means of parametric models. The proposed method can be utilized to cluster the effect of covariates with a univariate response variable, or to cluster a multivariate outcome. We report simulation results, comparing our approach with the existing techniques. The idea of combining CEC with QRCM per…

Statistics and ProbabilityStatistics::TheoryMultivariate statistics05 social sciencesUnivariateFunctional data analysis01 natural sciencesQuantile regressionQuantile regression coefficients modeling Multivariate analysis Functional data analysis Curves clustering Variable selection010104 statistics & probabilityComputational Mathematics0502 economics and businessParametric modelCovariateStatistics::MethodologyApplied mathematics0101 mathematicsStatistics Probability and UncertaintyCluster analysisSettore SECS-S/01 - Statistica050205 econometrics MathematicsQuantile
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