Browsing by Subject "Investigació operativa"

Now showing items 1-20 of 239

    • 4IR Integration of information technology best practice framework in operational technology 

      Shilenge, Musa; Telukdarie, Arnesh (OmniaScience, 2021)
      Article
      Open Access
      Purpose: Since inception in the 1970s, Operational Technology (OT) systems were designed to operate in isolation from Information Technology (IT) systems mainly due to differences in objectives relating to Confidentiality, ...

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

      Barceló Bugeda, Jaime (1984)
      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 Cluster analysis of vote transitions 

      Puig Oriol, Xavier; Ginebra Molins, Josep (2014)
      Article
      Restricted access - publisher's policy
      To help settle the debate triggered the day after any election around the origin and destination of the vote of winners and losers, a Bayesian analysis of the results in a pair of consecutive elections is proposed. It is ...

    • 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 fuzzy-evolutionary seller agent for an automatic negotiation framework on e-commerce 

      Manjacavas Ortíz, Ramón; Castro Sánchez, José Jesús; Moreno García, Juan (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2006)
      Article
      Open Access
      The business achievement via e-commerce is getting more important at the present time. E-commerce implies several activities. One of the most significant activity is the consummation of negotiations between sellers and ...

    • A GRASP algorithm for quota sequences with minimum work overload and forced interruption of operations in a mixed-product assembly line 

      Bautista Valhondo, Joaquín; Alfaro Pozo, Rocío (Springer, 2018-03-13)
      Article
      Open Access
      We present a GRASP algorithm to solve a problem that involves the sequencing of mixed products in an assembly line. The objective of the problem is to obtain a manufacturing sequence of models that generates a minimum work ...

    • 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 mixed-integer linear program for real-time train platforming management 

      Garcia Ródenas, Ricardo; López García, Maria Luz; Cadarso Morga, Luis; Codina Sancho, Esteve (Elsevier, 2022-03-11)
      Article
      Open Access
      Unexpected events may perturb operations and generate conflicts that must be addressed promptly to limit delay propagation and other negative impacts on the network. The real-time railway traffic management problem deals ...

    • 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 opinion agreement and confidence in multi-expert multi-criteria decision making 

      Canfora, Gerardo; Troiano, Luigi (Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2004)
      Article
      Open Access
      In multi-expert multi-criteria decision making problems, we often have to deal with different opinions, different importance of criteria and experts, missing data, unexpressed opinions and experts who are not fully ...

    • 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; Verhoosel, Clemens V.; 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 semi-parametric joint model for two sequential times to events and one longitudinal covariate 

      Serrat Piè, Carles; Abel Huertas, Jaime; Gómez Melis, Guadalupe (2012)
      Conference lecture
      Open Access
      The present work proposes a joint model for two sequential times to events together with longitudinal information, as an extension of the joint model by Wolfsohn and Tsiatis (1997) for one time to event and one longitudinal ...

    • A simulation framework for real-time assessment of dynamic ride sharing demand responsive transportation models 

      Linares Herreros, María Paz; Montero Mercadé, Lídia; Barceló Bugeda, Jaime; Carmona Bautista, Carlos (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Conference report
      Open Access
      Sustainable mobility is not only a technological question, automotive technology will be part of the solution combined with a paradigm shift from car ownership to vehicle usage, and the application of Information and ...

    • 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 congested strategy-based transit assignment model with hard capacity constraints 

      Codina Sancho, Esteve; Rosell Camps, Francisca (Elsevier, 2019-02-01)
      Article
      Open Access
      This paper expands on the stochastic version of the strategy-based congested transit assignment problem described in Codina and Rosell (2017b), specifically by extending it to cases dealing with explicit line capacities. ...

    • 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 ...