Browsing by Author "Castro Pérez, Jordi"
Now showing items 1-20 of 145
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1. Constrained Optimization. Introduction and modelling
(Universitat Politècnica de Catalunya, 2023-04-11)
Lecture notes
Open Access -
2. Constrained Optimization. Optimality conditions of constrained optimization problems
(Universitat Politècnica de Catalunya, 2019-05-06)
Lecture notes
Open Access -
3. Constrained Optimization. Duality
(Universitat Politècnica de Catalunya, 2019-05-13)
Lecture notes
Open Access -
4. Constrained Optimization. Linear optimization
(Universitat Politècnica de Catalunya, 2019-05-20)
Lecture notes
Open Access -
A cutting-plane approach for large-scale capacitated multi-period facility location using a specialized interior-point method
(2016-09-19)
Article
Open AccessWe 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
(2015-06)
Research report
Open AccessWe 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
(2013)
Conference report
Open Access -
A fix-and-relax heuristic for controlled tabular adjustment
(2013-07)
Research report
Open AccessControlled 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
(2017-06-15)
Article
Open AccessNational 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
(2017-05-23)
Research report
Open AccessNational 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
(2009)
Article
Restricted access - publisher's policyRefinery 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
(Institut d'Estadística de Catalunya, 2015-01-01)
Article
Open AccessThe 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
(Institut d'Estadística de Catalunya, 2015-06)
Article
Open AccessThe 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
(2020-11-03)
Article
Open AccessTwo-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
(2020-04)
Research report
Open AccessTwo-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
(Springer, 2016)
Conference report
Open AccessIn 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
(2018-11)
Research report
Open Access -
A specialized interior-point algorithm for huge minimum convex cost flows in bipartite networks
(2019-01-28)
Research report
Open AccessThe 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
(Elsevier, 2021-05)
Article
Open AccessThe 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
(2010-09)
Article
Restricted access - publisher's policyMinimum-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 ...
