Now showing items 1-20 of 275

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      A biobjective method for sample allocation in stratified sampling  [Article]

      Carrizosa Priego, Emilio José; Romero Morales, María Dolores (Elsevier, 2007-03-01)
      The two main and contradicting criteria guiding sampling design are accuracy of estimators and sampling costs. In stratified random sampling, the sample size must be allocated to strata in order to optimize both objectives. ...
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      A characterization of distributions based on linear regression of order statistics and record values  [Article]

      López Blázquez, José Fernando; Moreno Rebollo, Juan Luis (Indian Statistical Institute, 1997)
      We obtain the family of distributions for which the regression of one order statistic on another, not necessarily adjacent, is linear. As a consequence, we present a characterization of uniform distributions on an interval. ...
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      A characterization of the multivariate excess wealth ordering  [Article]

      Fernández Ponce, José María; Pellerey, Franco; Rodríguez Griñolo, María del Rosario (Elsevier, 2011-11)
      In this paper, some new properties of the upper-corrected orthant of a random vector are proved. The univariate rightspread or excess wealth function, introduced by Fernández-Ponce et al. (1996), is extended to multivariate ...
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      A comparison of formulations and solution methods for the minimum-envy location problem. Additional results  [Article]

      Espejo Miranda, María Inmaculada; Marín Pérez, Alfredo; Puerto Albandoz, Justo; Rodríguez Chía, Antonio Manuel (2008)
      We consider a discrete facility location problem with a new form of equity criterion. The model discussed in the paper analyzes the case where demand points only have strict preference order on the sites where the plants ...
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      A cooperative location game based on the 1-center location problem  [Article]

      Puerto Albandoz, Justo; Tamir, Arie; Perea Rojas-Marcos, Federico (Elsevier, 2011-10-16)
      In this paper we introduce and analyze new classes of cooperative games related to facility location models defined on general metric spaces. The players are the customers (demand points) in the location problem and the ...
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      A discretization result for some optimization problems in framework spaces with polyhedral obstacles and the Manhattan metric  [Article]

      Puerto Albandoz, Justo; Rodríguez Madrena, Moisés (Elsevier, 2018-07)
      In this work we consider the shortest path problem and the single facility Weber location problem in any real space of finite dimension where there exist different types of polyhedral obstacles or forbidden regions. These ...
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      A flexible approach to location problems  [Article]

      Rodríguez Chía, Antonio Manuel; Nickel, Stefan; Puerto Albandoz, Justo; Fernández García, Francisco Ramón (Springer, 2000-02)
      When dealing with location problems we are usually given a set of existing facilities and we are looking for the location of one or several new facilities. In the classical approaches weights are assigned to existing ...
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      A flexible model and efficient solution strategies for discrete location problems  [Article]

      Marín Pérez, Alfredo; Nickel, Stefan; Puerto Albandoz, Justo; Velten, Sebastian (Elsevier, 2009-03-06)
      Flexible discrete location problems are a generalization of most classical discrete locations problems like p-median or p-center problems. They can be modeled by using so-called ordered median functions. These functions ...
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      A generalized model of equality measures in network location problems  [Article]

      López de los Mozos Martín, María Cruz; Mesa López-Colmenar, Juan Antonio; Puerto Albandoz, Justo (Elsevier, 2008-03)
      In this paper, the concept of the ordered weighted averaging operator is applied to define a model which unifies and generalizes several inequality measures. For a location x, the value of the new objective function is the ...
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      A goodness-of-fit test for the multivariate Poisson distribution  [Article]

      Novoa Muñoz, Francisco; Jiménez Gamero, María Dolores (Institut d'Estadística de Catalunya, 2016)
      Bivariate count data arise in several different disciplines and the bivariate Poisson distribution is commonly used to model them. This paper proposes and studies a computationally convenient goodness-of-fit test for this ...
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      A heuristic method for simultaneous tower and pattern-free field optimization on solar power systems  [Article]

      Carrizosa Priego, Emilio José; Domínguez Bravo, Carmen Ana; Fernández Cara, Enrique; Quero García, Manuel (Elsevier, 2015-05)
      A heuristic method for optimizing a solar power tower system is proposed, in which both heliostat field (heliostat locations and number) and the tower (tower height and receiver size) are simultaneously considered. Maximizing ...
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      A market regulation bilevel problem: a case study of the Mexican petrochemical industry  [Article]

      Maravillo Gómez, Héctor; Camacho Vallejo, José Fernando; Puerto Albandoz, Justo; Labbé, Martine (Elsevier, 2019-08)
      In this paper, a bilevel programming model is proposed to study a problem of market regulation through government intervention. One of the main characteristics of the problem herein analyzed is that the government ...
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      A modeling framework for ordered weighted average combinatorial optimization  [Article]

      Fernández Aréizaga, Elena; Pozo Montaño, Miguel Ángel; Puerto Albandoz, Justo (Elsevier, 2014-05)
      Multiobjective combinatorial optimization deals with problems considering more than one viewpoint or scenario. The problem of aggregating multiple criteria to obtain a globalizing objective function is of special interest ...
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      A Monte Carlo comparison of three consistent bootstrap procedures  [Article]

      Pino Mejías, Rafael; Jiménez Gamero, María Dolores; Enguix González, Alicia (Taylor & Francis, 2009-04)
      Since bootstrap samples are simple random samples with replacement from the original sample, the information content of some bootstrap samples can be very low. To avoid this fact, some authors have proposed several variants ...
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      A nested heuristic for parameter tuning in support vector machines  [Article]

      Carrizosa Priego, Emilio José; Martín Barragán, Belén; Romero Morales, María Dolores (Elsevier, 2014-03)
      The default approach for tuning the parameters of a Support Vector Machine (SVM) is a grid search in the parameter space. Different metaheuristics have been recently proposed as a more efficient alternative, but they have ...
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      A new approach to multivariate lifetime distributions base don the excess-wealth concept an application in tumor Growth  [PhD Thesis]

      Rodríguez Griñolo, María del Rosario (2010)
      Las distribuciones de visa son de gran importancia en la teoría de modelización estocástica, teoría de la renovación, fiabilidad y análisis de supervivencia. El envejecimiento de un sistema físico o biológico se conoce ...
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      A new class of tests for multinormality with i.i.d. and garch data based on the empirical moment generating function  [Article]

      Henze, Norbert; Jiménez Gamero, María Dolores (Springer, 2019-06)
      We generalize a recent class of tests for univariate normality that are based on the empirical moment generating function to the multivariate setting, thus obtaining a class of affine invariant, consistent and easy-to-use ...
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      A non-parametric ANOVA-type test for regression curves based on characteristic functions  [Article]

      Pardo Fernández, Juan Carlos; Jiménez Gamero, María Dolores; El Ghouch, Anouar (Wiley, 2015-03)
      This article studies a new procedure to test for the equality of k regression curves in a fully nonparametric context. The test is based on the comparison of empirical estimators of the characteristic functions of the ...
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      A refinement of the concept of equilibrium in multiple objective continuous games  [Article]

      Puerto Albandoz, Justo; Infante Macías, Rafael; Fernández García, Francisco Ramón (Real Academia de Ciencias Exactas, Físicas y Naturales, 1999)
      This paper considers a perfection refinement of the concept of equihbrium for multiple objective non-zero sum games. Based on the ideas of van Damme (1991) on perturbed games and stability the concept of perfect equilibrium ...
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      A semidefinite programming approach for solving multiobjective linear programming  [Article]

      Blanco Izquierdo, Víctor; Puerto Albandoz, Justo; El-Haj Ben-Ali, Safae (Springer, 2014-03)
      Several algorithms are available in the literature for finding the entire set of Pareto-optimal solutions in MultiObjective Linear Programming (MOLP). However, it has not been proposed so far an interior point algorithm ...