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Mostrando ítems 181-190 de 194
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Tests for the equality of conditional variance functions in nonparametric regression
(Institute of Mathematical Statistics, 2015)
In this paper we are interested in checking whether the conditional variances are equal in k ≥ 2 location-scale regression models. Our procedure is fully nonparametric and is based on the comparison of the error distributions ...
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Partial Gröbner bases for multiobjective integer linear optimization
(Society for Industrial and Applied Mathematics, 2012)
This paper presents a new methodology for solving multiobjective integer linear programs (MOILP) using tools from algebraic geometry. We introduce the concept of partial Gr¨obner basis for a family of multiobjective programs ...
Artículo
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Embedding the production policy in location-allocation decisions
(Springer, 2019-11-21)
This paper investigates how the production policy, as well as other factors, affect the facility location-allocation decisions. We focus on a p-median location problem in which one single perishable product is to be ...
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On support vector machines under a multiple-cost scenario
(Springer, 2018-07-31)
Support vector machine (SVM) is a powerful tool in binary classification, known to attain excellent misclassification rates. On the other hand, many realworld classification problems, such as those found in medical ...
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Variable selection in classification for multivariate functional data
(ELSEVIER SCIENCE INC, 2019-05-01)
When classification methods are applied to high-dimensional data, selecting a subset of the predictors may lead to an improvement in the predictive ability of the estimated model, in addition to reducing the model complexity. ...
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Influence Analysis on Discriminant Coordinates
(Taylor & Francis, 2011-03-16)
Discriminant analysis (DA), particularly Discriminant Coordinates (DC), is broadly applied in the scientific literature and included in many statistical software packages. DC is used to analyze biomedical data, especially ...
Capítulo de Libro
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Vulnerability assessment of spatial networks: models and solutions
(Springer, 2014)
In this paper we present a collection of combinatorial optimization problems that allows to assess the vulnerability of spatial networks in the presence of disruptions. The proposed measures of vulnerability along with the ...
Artículo
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Gaussian variable neighborhood search for continuous optimization
(PERGAMON-ELSEVIER SCIENCE LTD, 2012-01-01)
Variable Neighborhood Search (VNS) has shown to be a powerful tool for solving both discrete and box-constrained continuous optimization problems. In this note we extend the methodology by allowing also to address unconstrained ...
Artículo
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Analysis of Two Putative Candida albicans Phosphopantothenoylcysteine Decarboxylase / Protein Phosphatase Z Regulatory Subunits Reveals an Unexpected Distribution of Functional Roles
(Public Library of Science, 2016-08)
Protein phosphatase Z (Ppz) is a fungus specific enzyme that regulates cell wall integrity, cation homeostasis and oxidative stress response. Work on Saccharomyces cerevisiae has shown that the enzyme is inhibited by ...
Artículo
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The effect of axial spondyloarthritis on mental health: Results from the Atlas
(The Journal of Rheumatology Publishing Co. Ltd., 2019)
Objective: To assess the risk for mental disorders in patients with axSpA and to examine the associated factors with this. Method: In 2016, a sample of 680 axSpA patients was interviewed as part of the development process ...