Now showing items 1-20 of 209

    • A branch and bound approach for the capacitated plant location problem using cuts from the partial convex hull 

      Barceló Bugeda, Jaime (1984)
      External research report
      Open Access
      The efficient solution of capacitated plant location problems usually requires the development of specific software mainly when the problems are pure integer ones, standard mathematical programming codes being highly ...
    • A case study for the assessment of a dynamic passenger ride sharing mobility service 

      Linares Herreros, María Paz; Montero Mercadé, Lídia; Barceló Bugeda, Jaime; Casanovas Garcia, Josep; Carmona Bautista, Carlos; Serch, Oriol (2017)
      Conference report
      Restricted access - publisher's policy
      Sustainable mobility is not merely a technological question. While automotive technology will be part of the solution, it will also be combined with a paradigm shift from car ownership to vehicle usage, which itself will ...
    • A Dynamic Stochastic Model For Balance Sheet Optimization 

      Barnils Sanchez, Armand (Universitat Politècnica de Catalunya / Illinois Institute of Technology, 2013)
      Bachelor thesis
      Restricted access - author's decision
      Covenantee:   Illinois Institute of Technology
    • A flexoelectric microelectromechanical system on silicon 

      Bhaskar, Umesh Kumar; Banerjee, Nirupam; Abdollahi Hosnijeh, Amir; Wang, Zhen; Scholm, Darrell G.; Rijnders, Guus; Catalan, Gustau (2016)
      Article
      Open Access
      Flexoelectricity allows a dielectric material to polarize in response to a mechanical bending moment and, conversely, to bend in response to an electric field. Compared with piezoelectricity, flexoelectricity is a weak ...
    • A flow formulation for the optimum communication spanning tree 

      Fernández Aréizaga, Elena; Luna Mota, Carlos; Hildenbrandt, Achim; Reinelt, Gerard; Wiesberg, Stefan (Universidad de La Laguna, 2013)
      Conference report
      Open Access
      In this paper we address the Optimum Communication Spanning Tree Problem. We present a formulation that uses three index variables and we propose several families of inequalities, which can be used to reinforce the ...
    • A local multiple proper generalized decomposition based on the partition of unity 

      Ibáñez Pinillo, Rubén; Abisset Chavanne, Emmanuelle; Chinesta Soria, Francisco; Huerta, Antonio; Cueto Prendes, Elias (John Wiley & sons, 2019-10-12)
      Article
      Open Access
      It is well known that model order reduction techniques that project the solution of the problem at hand onto alow-dimensional subspace present difficulties when this solution lies on a non-linear manifold. To overcomethese ...
    • A method of multiobjective decision making using a vector value function 

      Ríos Insúa, Sixto; González Pachón, Jacinto; Mateos, Alfonso (Institut d'Estadística de Catalunya, 1994)
      Article
      Open Access
      A decision situation with partial information on preferences by means of a vector value function is assumed. The concept of minimum value dispersion solution as a reference point joined with a pseudodistance function from ...
    • A model and an algorithm for the grouping problem in telecom networks 

      García, F.; Hackbarth, Klaus D. (Universitat Politècnica de Catalunya. Centre de Càlcul, 1991)
      Article
      Open Access
      This paper deals with the so called grouping problem which arises in telecommunication network optimization when transmission equipment with a certain hierarchy is used. It is shown how this problem is embedded in the ...
    • A model for the simultaneous selection of bus lines and frequency setting problems in the expansion of public transit systems 

      Maureira Alegría, Grace Kelly; Codina Sancho, Esteve (Elsevier, 2020-03-02)
      Article
      Open Access
      When expanding an existing public transport system a common practice consists of defining a set of candidate new lines andfrom them, choose those that will revert into a greater increase of the system’s performance while ...
    • A new optimal electricity market bid model solved through perspective cuts 

      Corchero García, Cristina; Mijangos Fernández, Eugenio; Heredia, F.-Javier (Francisco Javier) (Springer, 2011-11)
      Article
      Restricted access - publisher's policy
      On current electricity markets the electrical utilities are faced with very sophisticated decision making problems under uncertainty. Moreover, when focusing in the short-term management, generation companies must include ...
    • A production planning problem in FMS 

      Escudero, L. F.; Pérez-Sainz de Rozas, G. (Universitat Politècnica de Barcelona. Centre de Càlcul, 1987)
      Article
      Open Access
      We present in this work a hierarchical approach for generating alternatives for production planning in a generic floor shop problem within the environment of Flexible Manufacturing Systems (hereafter, FMS). Briefly, the ...
    • A Proper Generalized Decomposition (PGD) approach to crack propagation in brittle materials: with application to random field material properties 

      Garikapati, Hasini; Zlotnik, Sergio; Díez, Pedro; V. Verhoosel, Clemens; van Brummelen, Harald (Springer, 2020-02)
      Article
      Open Access
      Understanding the failure of brittle heterogeneous materials is essential in many applications. Heterogeneities in materialproperties are frequently modeled through random fields, which typically induces the need to solve ...
    • A review of impact damage detection in structures using strain data 

      Mujica Delgado, Luis Eduardo; Rodellar Benedé, José; Vehí Casellas, José (2010)
      Article
      Open Access
      This paper aims to provide a state-of-the-art review on impact damage detection techniques in structures using strain data. An overview of impact detection systems is provided. These include sensors, specimens, and impact ...
    • A simulation-enhanced lean design process 

      Marvel, Jon H.; Standrigde, Charles Robert (School of Industrial and Aeronautic Engineering of Terrassa (ETSEIAT). Universitat Politècnica de Catalunya (UPC), 2009-06)
      Article
      Open Access
      A traditional lean transformation process does not validate the future state before implementation, relying instead on a series of iterations to modify the system until performance is satisfactory. An enhanced lean process ...
    • A stochastic programming model for the optimal electricity market bid problem with bilateral contracts for thermal and combined cycle units 

      Heredia, F.-Javier (Francisco Javier); Rider Flores, Marcos Julio; Corchero García, Cristina (2008-10)
      Article
      Open Access
      This paper developed a stochastic programming model that integrated the most recent regula- tion rules of the Spanish peninsular system for bilateral contracts in the day-ahead optimal bid problem. Our model allows a ...
    • A stochastic version of the strategy-based congested transit assignment model and a technique by smoothing approximations 

      Codina Sancho, Esteve; Rosell Camps, Francisca (Springer, 2018)
      Article
      Restricted access - publisher's policy
      This paper develops a stochastic version for the strategybased congested transit assignment problem stated by Cominetti and Correa (Trans. Sci. 35(3):250-267, 2001). As a distinctive approach, this stochastic version takes ...
    • A surface mesh smoothing and untangling method independent of the CAD parameterization 

      Gargallo Peiró, Abel; Roca Navarro, Francisco Javier; Sarrate Ramos, Josep (2014-04-01)
      Article
      Open Access
      A method to optimize triangular and quadrilateral meshes on parameterized surfaces is proposed. The optimization procedure relocates the nodes on the surface to improve the quality (smooth) and ensures that the elements ...
    • A traffic simulation tool for assessing smart city policies (CitScale) 

      Linares Herreros, María Paz; Montero Mercadé, Lídia; Casanovas Garcia, Josep (2019-09-28)
      Article
      Open Access
      Over the last century, cities have developed as a function of increased usage of automobiles as the standard transport mode. The number of cars increased along with the population as highways and parking spots became ...
    • AAR-based decomposition algorithm for non-linear convex optimisation 

      Rabiei, Syednima; Muñoz Romero, José (2014)
      Conference lecture
      Open Access
    • Adaptividade e estimativas de erro orientadas por metas aplicadas a um benchmark test de propagação de onda 

      Steffens, Lindaura; Díez, Pedro; Parés Mariné, Núria; Alves, Marcelo Krajnc (2016-01-12)
      Article
      Open Access
      O objetivo deste artigo é estudar a eficiência e a robustez de técnicas adaptativas e estimativas de erro orientadas por metas para um benchmark test. As técnicas utilizadas aqui são baseadas em um simples pós-processo das ...