Now showing items 21-40 of 107

    • APLICACIONS DE LA PROGRAMACIÓ NO LINEAL (Examen 2n quadrim) 

      Castro Pérez, Jordi (Universitat Politècnica de Catalunya, 2004-05-14)
      Exam
      Restricted access to the UPC academic community
    • Assessing the disclosure risk of CTA-like methods 

      Castro Pérez, Jordi (2013)
      Conference report
      Open Access
      Minimum distance controlled tabular adjustment (CTA) is a recent perturbative approach for statistical disclosure control in tabular data. CTA looks for the closest safe table, using some particular distance. In this talk ...
    • Bartering integer commodities with exogenous prices 

      Nasini, Stefano; Castro Pérez, Jordi; Fonseca Casas, Pau (2013-11)
      External research report
      Open Access
      The analysis of markets with indivisible goods and xed exogenous prices has played an important role in economic models, especially in relation to wage rigidity and unemployment. This paper provides a novel mathematical ...
    • Block coordinate descent decomposition for statistical data protection using controlled tabular adjustment 

      González Alastrué, José Antonio; Castro Pérez, Jordi (2009-10)
      External research report
      Restricted access - confidentiality agreement
      Tabular data is routinely released by national statistical agencies (NSA) to disseminate aggregated information from some particular microdata. Prior to publication, these tables have to be treated to preserve information ...
    • CONTINUOUS OPTIMIZATION 

      Heredia, F.-Javier (Francisco Javier); Castro Pérez, Jordi (Universitat Politècnica de Catalunya, 2018-01-16)
      Exam
      Restricted access to the UPC academic community
    • CONTINUOUS OPTIMIZATION 

      Heredia, F.-Javier (Francisco Javier); Castro Pérez, Jordi (Universitat Politècnica de Catalunya, 2017-01-12)
      Exam
      Restricted access to the UPC academic community
    • CONTINUOUS OPTIMIZATION 

      Castro Pérez, Jordi (Universitat Politècnica de Catalunya, 2019-11-06)
      Exam
      Restricted access to the UPC academic community
    • CONTINUOUS OPTIMIZATION 

      Castro Pérez, Jordi (Universitat Politècnica de Catalunya, 2020-10-30)
      Exam
      Restricted access to the UPC academic community
    • CONTINUOUS OPTIMIZATION 

      Heredia, F.-Javier (Francisco Javier); Castro Pérez, Jordi (Universitat Politècnica de Catalunya, 2021-01-12)
      Exam
      Restricted access to the UPC academic community
    • CONTINUOUS OPTIMIZATION 

      Heredia, F.-Javier (Francisco Javier); Castro Pérez, Jordi (Universitat Politècnica de Catalunya, 2019-01-15)
      Exam
      Restricted access to the UPC academic community
    • CONTINUOUS OPTIMIZATION 

      Heredia, F.-Javier (Francisco Javier); Castro Pérez, Jordi (Universitat Politècnica de Catalunya, 2020-01-14)
      Exam
      Restricted access to the UPC academic community
    • Existence, uniqueness and convergence of the regularized primal-dual central path 

      Castro Pérez, Jordi; Cuesta Andrea, Jordi (2010-09)
      Article
      Restricted access - publisher's policy
      In a recent work [J. Castro, J. Cuesta, Quadratic regularizations in an interior-point method for primal block-angular problems, Mathematical Programming, in press (doi:10.1007/s10107-010-0341-2)] the authors improved one ...
    • Exploiting total unimodularity for classes of random network problems 

      Castro Pérez, Jordi; Nasini, Stefano (2013-07)
      External research report
      Open Access
      Network analysis is of great interest for the study of social , biological and technolog- ical networks, with applications, among others, in busines s, marketing, epidemiology and telecommunications. Researchers are ...
    • Extending controlled tabular adjustment for non-additive tabular data with negative protection levels 

      Castro Pérez, Jordi (Institut d'Estadística de Catalunya, 2011)
      Article
      Open Access
      Minimum distance controlled tabular adjustment (CTA) is a recent perturbative methodology for the protection of tabular data. An implementation of CTA was recently used by Eurostat for the protection of European Union ...
    • Fix-and-relax approaches for controlled tabular adjustment 

      Baena, Daniel; Castro Pérez, Jordi; González Alastrué, José Antonio (2015-06-01)
      Article
      Open Access
      Controlled tabular adjustment (CIA) is a relatively new protection technique for tabular data protection. CTA formulates a mixed integer linear programming problem, which is challenging for tables of moderate size. Even ...
    • Generating conditional uniform random networks by optimization procedures 

      Nasini, Stefano; Castro Pérez, Jordi (Universidad de La Laguna, 2013)
      Conference report
      Open Access
      Complex networks is a recent area of research motivated by the empirical study of realworld networks, such as social relations, protein interaction, neuronal connections, etc. As closed-form probabilistic models of networks ...
    • Implementació d'un algorisme primal-dual de punt interior amb fites superiors a les variables 

      Castro Pérez, Jordi (Institut d'Estadística de Catalunya, 1995)
      Article
      Open Access
      Implementación de un algoritmo primal-dual de punto interior con variables acotadas superiormente.
    • Implementación de un algoritmo primal-dual de orden superior mediante el uso de un método predictor-corrector para programación lineal 

      Castro Pérez, Jordi (Institut d'Estadística de Catalunya, 1998)
      Article
      Open Access
      Se presenta una implementación de un algoritmo primal-dual de punto interior para la solución de problemas lineales. El algoritmo difiere de otros ya existentes (como el implementado en el sistema LoQo) en el hecho de que ...
    • Improving an interior-point algorithm for multicommodity flows by quadratic regularizations 

      Castro Pérez, Jordi; Cuesta, Jordi (2009-07)
      External research report
      Open Access
      One of the best approaches for some classes of multicommodity flow problems is a specialized interior-point method that solves the normal equations by a combination of Cholesky factorizations and preconditioned conjugate ...
    • Improving an interior-point approach for large block-angular problems by hybrid preconditioners 

      Bocanegra, Silvana; Castro Pérez, Jordi; Oliveira, Aurelio R.L. (2012-07)
      External research report
      Open Access
      The computational time required by interior-point methods is often domi- nated by the solution of linear systems of equations. An efficient spec ialized interior-point algorithm for primal block-angular proble ms has ...