Now showing items 186-205 of 275

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      On a new NBUE property in multivariate sense: an application  [Article]

      Fernández Ponce, José María; Pellerey, Franco; Rodríguez Griñolo, María del Rosario (Elsevier, 2011-12-01)
      Multivariate lifetime data frequently arise so it is important to consider different multivariate distributions that could be used to model aging concepts. The generalization of univariate versions has two main problems. One ...
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      On location-allocation problems for dimensional facilities  [Article]

      Mallozzi, Lina; Puerto Albandoz, Justo; Rodríguez Madrena, Moisés (Springer, 2019)
      This paper deals with a bilevel approach of the location-allocation problem with dimensional facilities. We present a general model that allows us to consider very general shapes of domains for the dimensional facilities ...
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      On minimax-regret Huff location models  [Article]

      Bello Garboza, Lenys; Blanquero Bravo, Rafael; Carrizosa Priego, Emilio José (Elsevier, 2011-01)
      We address the following single-facility location problem: a firm is entering into a market by locating one facility in a region of the plane. The demand captured from each user by the facility will be proportional to the ...
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      On the exponential cardinality of FDS for the ordered p-median problem  [Article]

      Puerto Albandoz, Justo; Rodríguez Chía, Antonio Manuel (Elsevier, 2005)
      We study finite dominating sets (FDS) for the ordered median problem. This kind of problems allows to deal simultaneously with a large number of models. We show that there is no valid polynomial size FDS for the general ...
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      On the Newton method for solving fuzzy optimization problems  [Article]

      Chalco Cano, Yurilev; Nunes Silva, Geraldo; Rufián Lizana, Antonio (Elsevier, 2015-08-01)
      In this article we consider optimization problems where the objectives are fuzzy functions (fuzzy-valued functions). For this class of fuzzy optimization problems we discuss the Newton method to find a non-dominated solution. ...
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      Optimal arrangements of hyperplanes for SVM-based multiclass classification  [Article]

      Blanco Izquierdo, Víctor; Japón Sáez, Alberto; Puerto Albandoz, Justo (Springer, 2019-07)
      In this paper, we present a novel approach to construct multiclass classifiers by means of arrangements of hyperplanes. We propose different mixed integer (linear and non linear) programming formulations for the problem ...
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      Optimal cluster selection probabilities to estimate the finite population distribution function under PPS cluster sampling  [Article]

      Mayor Gallego, José Antonio (Springer, 2002-06)
      We study the estimation of the finite population distribution function under several sampling strategies based on a PPS cluster sampling, that is to say, with cluster selection probabilities proportional to size. For the ...
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      Optimal expected-distance separating halfspace  [Article]

      Carrizosa Priego, Emilio José; Plastria, Frank (INFORMS (Institute for Operations Research and Management Sciences), 2008-08)
      One recently proposed criterion to separate two datasets in discriminant analysis, is to use a hyperplane which minimises the sum of distances to it from all the misclassified data points. Here all distances are supposed ...
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      Optimal location and design of a competitive facility  [Article]

      Plastria, Frank; Carrizosa Priego, Emilio José (Springer, 2004-06)
      A single facility has to be located in competition with fixed existing facilities of similar type. Demand is supposed to be concentrated at a finite number of points, and consumers patronise the facility to which they are ...
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      Optimality and duality on Riemannian manifolds  [Article]

      Ruiz Garzón, Gabriel; Osuna Gómez, Rafaela; Rufián Lizana, Antonio; Hernández Jiménez, Beatriz (Mathematical Society of the Republic of China, 2018-10)
      Our goal in this paper is to translate results on function classes that are characterized by the property that all the Karush-Kuhn-Tucker points are efficient solutions, obtained in Euclidean spaces to Riemannian manifolds. ...
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      Optimization of multiple receivers solar power tower systems  [Article]

      Carrizosa Priego, Emilio José; Domínguez Bravo, Carmen Ana; Fernández Cara, Enrique; Quero García, Manuel (Elsevier, 2015-10)
      In this article a new procedure to optimize the design of a Multiple Receivers Solar Power Tower system is presented. The proposed procedure allows to optimize the different receivers (height, aperture tilt angle, azimuth ...
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      Optimization-based methods for classification and regression problems with imprecise data  [PhD Thesis]

      Gordillo Santofimia, José Feliciano (2008)
      En esta tesis, desarrollamos varias herramientas para resolver problemas de clasificación y regresión donde los elementos del conjunto de datos no son vectores de características puntuales, sino conjuntos en Rd con ciertas ...
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      Order statistics from overlapping samples: bivariate densities and regression properties  [Article]

      López Blázquez, José Fernando; Su, Nan-Cheng; Wesołowski, Jacek (Taylor & Francis, 2019)
      In this paper we are interested in the joint distribution of two order statistics from overlapping samples. We give an explicit formula for the distribution of such a pair of random variables under the assumption that the ...
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      Ordered median hub location problems with capacity constraints  [Article]

      Puerto Albandoz, Justo; Ramos Gallego, Ana Belén; Rodríguez Chía, Antonio Manuel; Sánchez Gil, María Carmen (Elsevier, 2015-06-15)
      The Single Allocation Ordered Median Hub Location problem is a recent hub model introduced in [36] J. Puerto, A.B. Ramos, and A.M. Rodríguez-Chía. Single-Allocation Ordered Median Hub Location Problems. Computers and ...
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      Ordered weighted average optimization in multiobjective spanning tree problems  [Presentation]

      Fernández Areizaga, Elena; Pozo Montaño, Miguel Ángel; Puerto Albandoz, Justo; Scozzari, Andrea (2015)
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      p-facility Huff location problem on networks  [Article]

      Blanquero Bravo, Rafael; Carrizosa Priego, Emilio José; Gazdag-Tóth, Boglárka; Nogales Gómez, Amaya (Elsevier, 2016-11-16)
      The p-facility Huff location problem aims at locating facilities on a competitive environment so as to maximize the market share. While it has been deeply studied in the field of continuous location, in this paper we study ...
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      El papel de la ansiedad matemática en el paso de la educación secundaria a la educación universitaria  [Article]

      Pérez Tyteca, Patricia; Castro Martínez, Enrique; Segovia Álex, Isidoro; Castro Martínez, Encarnación; Fernández García, Francisco Ramón; Cano García, Francisco (Universidad de Granada, 2009-09)
      Las respuestas afectivas juegan un papel esencial en el proceso de enseñanza y aprendizaje de las matemáticas. Gran número de investigaciones se ha centrado en la ansiedad matemática y la han relacionado con diferencias ...
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      Pareto optimality conditions and duality for vector quadratic fractional optimization problems  [Article]

      Alves de Oliveira, Washington; Beato Moreno, Antonio; Moretti, Antonio Carlos; Salles Neto, Luiz Leduino de (Hindawi, 2014)
      One of the most important optimality conditions to aid in solving a vector optimization problem is the first-order necessary optimality condition that generalizes the Karush-Kuhn-Tucker condition. However, to obtain the ...
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      Partial Gröbner bases for multiobjective integer linear optimization  [Article]

      Blanco Izquierdo, Víctor; Puerto Albandoz, Justo (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 ...
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      La población andaluza, situación y principales cambios  [Article]

      Arroyo Pérez, Andrés (Instituto de Estadística de Andalucía (Consejería de Economía, Innovación y Ciencia), 2010)
      Las características fundamentales del pasado reciente de la población andaluza siguen, en líneas generales, el comportamiento de la población española: mantenimiento del crecimiento de la población, envejecimiento progresivo, ...