Reports de recerca: Recent submissions

Now showing items 1-12 of 87

    • 5È. Audit clínic de l'ictus. Catalunya 2018/19 

      Salvat Plana, Mercè; Pérez de la Ossa, Natalia; Cortés Martínez, Jordi; Ayesta, Mercè; Gallofré, Guillem (2021-02-01)
      Research report
      Open Access
      S’han auditat 4.008 casos ingressats per ictus agut entre 2018 i 2019. El període d’estudi s’ha ampliat a 6 mesos, en períodes de 1 mes i mig al llarg de 12 mesos, similars per a tots els centres. L’obtenció prospectiva ...

    • On solving large-scale multistage stochastic problems with a new specialized interior-point approach 

      Castro Pérez, Jordi; Escudero Bueno, Laureano F.; Monge Ivars, Juan Francisco (2021-12)
      Research report
      Open Access
      A novel approach based on a specialized interior-point method (IPM) is presented for solving large-scale stochastic multistage continuous optimization problems, which represent the uncertainty in strategic multistage and ...

    • New interior-point approach for one- and two-class linear support vector machines using multiple variable splitting 

      Castro Pérez, Jordi (2021-12)
      Research report
      Open Access
      Multiple variable splitting is a general technique for decomposing problems by using copies of variables and additional linking constraints that equate their values. The resulting large optimization problem can be solved ...

    • Transport analytics approaches to the dynamic origin-destination estimation problem 

      Ros Roca, Xavier; Montero Mercadé, Lídia; Barceló Bugeda, Jaime; Noëkel, Klaus; Gentile, Guido (2020-10)
      Research report
      Restricted access - author's decision
      Dynamic traffic models require dynamic inputs, and one of the main inputs are the Dynamic Origin-Destinations (OD) matrices describing the variability over time of the trip patterns across the network. The Dynamic OD Matrix ...

    • An algorithm for the microaggregation problem using column generation 

      Gentile, Claudio; Spagnolo Arrizabalaga, Enric; Castro Pérez, Jordi (2020-06)
      Research report
      Open Access
      The field of Statistical Disclosure Control aims at reducing the risk of re-identification of an individualwhen disseminating data, and it is one of the main concerns of national statistical agencies. OperationsResearch ...

    • KLASS: estudi d'un sistema d'ajuda al tractament estadístic de grans bases de dades (Master Thesis) 

      Gibert, Karina (1991-03)
      Research report
      Open Access

    • Introducing spaced mosaic plots 

      Fernández Martínez, Daniel; Arnold, Richard; Pledger, Shirley (2014-09-01)
      Research report
      Open Access
      Recent research has developed a group of likelihood-based finite mixture mod- els for a data matrix with ordinal data, establishing likelihood-based multivari- ate methods which applies fuzzy clustering via finite mixtures ...

    • Un compilador per l'UPCLISP 

      Riaño Ramos, David; Gibert, Karina; Torra Reventos, Vicenc; Cortés García, Claudio Ulises (1990)
      Research report
      Open Access
      El report recull el desenvolupament d'un compilador per a una versió de LISP pròpia de la UPC, l'UPCLISP. El procés de compilació va prenent una a una les funcions i després per a cadascuna d'elles fa una anàlisi de tipus ...

    • A new interior-point approach for large two-stage stochastic problems 

      Castro Pérez, Jordi; Lama Zubirán, Paula de la (2020-04)
      Research report
      Open Access
      Two-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 ...

    • Using interior point solvers for optimizing progressive lens models with spherical coordinates 

      Casanellas Peñalver, Glòria; Castro Pérez, Jordi (2019-05)
      Research report
      Open Access
      Designing progressive lenses is a complex problem that has beenpreviously solved by formulating an optimization model based on Cartesiancoordinates. In this work a new progressive lens model using spherical co-ordinates ...

    • An assigment free data driven approach to the dynamic origin destination matrix estimation problem 

      Ros Roca, Xavier; Barceló Bugeda, Jaime; Montero Mercadé, Lídia (2020-02-05)
      Research report
      Open Access
      Dynamic traffic models require dynamic inputs, and one of the main inputs are the Dynamic Origin-Destinations (OD) matrices describing the variability over time of the trip patterns across the network. The Dynamic OD Matrix ...

    • Simulació de la mobilitat pel pas del tramvia per l’avinguda Diagonal (Francesc Macià – Pl. de les Glòries) 

      Rosell Camps, Francisca; Rodero, Francisco; Saurí Marchán, Sergi (2017-05)
      Research report
      Open Access
      L’1 de març de 2016, l’Ajuntament de Barcelona i la Generalitat van signar el protocol de col·laboració per impulsar la connexió de les dues xarxes de tramvia, que estableix que l’Ajuntament determinarà el traçat de la ...