Exploració per autor "Castro Pérez, Jordi"
Ara es mostren els items 1-20 de 144
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1. Constrained Optimization. Introduction and modelling
Castro Pérez, Jordi (Universitat Politècnica de Catalunya, 2023-04-11)
Apunts
Accés obert -
2. Constrained Optimization. Optimality conditions of constrained optimization problems
Castro Pérez, Jordi (Universitat Politècnica de Catalunya, 2019-05-06)
Apunts
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3. Constrained Optimization. Duality
Castro Pérez, Jordi (Universitat Politècnica de Catalunya, 2019-05-13)
Apunts
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4. Constrained Optimization. Linear optimization
Castro Pérez, Jordi (Universitat Politècnica de Catalunya, 2019-05-20)
Apunts
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A cutting-plane approach for large-scale capacitated multi-period facility location using a specialized interior-point method
Castro Pérez, Jordi; Nasini, Stefano; Saldanha da Gama, Francisco (2016-09-19)
Article
Accés obertWe propose a cutting-plane approach (namely, Benders decomposition) for a class of capacitated multi-period facility location problems. The novelty of this approach lies on the use of a specialized interior-point method ... -
A cutting-plane approach for large-scale capacitated multi-period facility location using a specialized interior-point method
Castro Pérez, Jordi; Nasini, Stefano; Saldanha da Gama, Francisco (2015-06)
Report de recerca
Accés obertWe propose a cutting-plane approach (namely, Benders decomposition) for a class of capacitated multi-period facility location problems. The novelty of this approach lies on the use of a specialized interior-point method ... -
A fast CTA method without the complicating binary decisions
Castro Pérez, Jordi; González Alastrué, José Antonio (2013)
Text en actes de congrés
Accés obert -
A fix-and-relax heuristic for controlled tabular adjustment
Baena, Daniel; Castro Pérez, Jordi (2013-07)
Report de recerca
Accés obertControlled tabular adjustment (CTA) is an emerging protect ion technique for tabular data pro- tection. CTA formulates a mixed integer linear programming problem, which is tough for tables of moderate size. Finding a ... -
A linear optimization based method for data privacy in statistical tabular data
Castro Pérez, Jordi; González Alastrué, José Antonio (2017-06-15)
Article
Accés obertNational Statistical Agencies routinely disseminate large amount of data. Prior to dissemination these data have to be protected to avoid releasing confidential information. Controlled tabular adjustment (CTA) is one of ... -
A linear optimization based method for data privacy in statistical tabular data
Castro Pérez, Jordi; González Alastrué, José Antonio (2017-05-23)
Report de recerca
Accés obertNational Statistical Agencies routinely disseminate large amounts of data. Prior to dissemination these data have to be protected to avoid releasing confidential information. Controlled tabular adjustment (CTA) is one of ... -
A mathematical model of refinery operations characterised by complete horizontal integration of subsystems from purchase to product distribution
Alabi, Adebayo Adejare; Castro Pérez, Jordi (2009)
Article
Accés restringit per política de l'editorialRefinery economics are extremely complex and involve massive amounts of operational data and decision-making processes; therefore, most refinery planners model and solve each sub-problem sequentially and independently. ... -
A mathematical programming approach for different scenarios of bilateral bartering
Nasini, Stefano; Castro Pérez, Jordi; Fonseca Casas, Pau (Institut d'Estadística de Catalunya, 2015-01-01)
Article
Accés obertThe analysis of markets with indivisible goods and fixed exogenous prices has played an important role in economic models, especially in relation to wage rigidity and unemployment. This paper provides a novel mathematical ... -
A mathematical programming approach for different scenarios of bilateral bartering
Nasini, Stefano; Castro Pérez, Jordi; Fonseca, Pau (Institut d'Estadística de Catalunya, 2015-06)
Article
Accés obertThe analysis of markets with indivisible goods and fixed exogenous prices has played an important role in economic models, especially in relation to wage rigidity and unemployment. This paper provides a novel mathematical ... -
A new interior-point approach for large separable convex quadratic two-stage stochastic problems
Castro Pérez, Jordi; Lama Zubirán, Paula de la (2020-11-03)
Article
Accés obertTwo-stage stochastic models give rise to very large optimization problems. Several approaches havebeen devised for efficiently solving them, including interior-point methods (IPMs). However, usingIPMs, the linking columns ... -
A new interior-point approach for large two-stage stochastic problems
Castro Pérez, Jordi; Lama Zubirán, Paula de la (2020-04)
Report de recerca
Accés obertTwo-stage stochastic models give rise to very large optimization problems. Several approaches havebeen devised for efficiently solving them, including interior-point methods (IPMs). However, usingIPMs, the linking columns ... -
A second order cone formulation of continuous CTA model
Lesaja, Goran; Castro Pérez, Jordi; Oganian, Anna (Springer, 2016)
Text en actes de congrés
Accés obertIn this paper we consider a minimum distance Controlled Tabular Adjustment (CTA) model for statistical disclosure limitation (control) of tabular data. The goal of the CTA model is to find the closest safe table to some ... -
A specialized interior-point algorithm for huge minimum convex cost flows in bipartite networks
Castro Pérez, Jordi; Nasini, Stefano (2018-11)
Report de recerca
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A specialized interior-point algorithm for huge minimum convex cost flows in bipartite networks
Castro Pérez, Jordi; Nasini, Stefano (2019-01-28)
Report de recerca
Accés obertThe computation of the Newton direction is the most time consuming step of interior-point methods. This direction was efficiently computed by a combination of Cholesky factorizations and conjugate gradients in a specialized ... -
A specialized interior-point algorithm for huge minimum convex cost flows in bipartite networks
Castro Pérez, Jordi; Nasini, Stefano (Elsevier, 2021-05)
Article
Accés obertThe computation of the Newton direction is the most time consuming step of interior-point methods. This direction was efficiently computed by a combination of Cholesky factorizations and conjugate gradients in a specialized ... -
A tool for analyzing and fixing infeasible RCTA instances
Castro Pérez, Jordi; González Alastrué, José Antonio (2010-09)
Article
Accés restringit per política de l'editorialMinimum-distance controlled tabular adjustment methods (CTA), and its restricted variants (RCTA), is a recent perturbative approach for tabular data protection. Given a table to be protected, the purpose of RCTA is to find ...