Enviaments recents

  • Optimal power flow for resistive DC networks: a port-hamiltonian approach 

    Benedito Benet, Ernest; del Puerto Flores, Dunstano; Dòria Cerezo, Arnau; Scherpen, Jacquelien (2017-07-01)
    Article
    Accés obert
    This paper studies the optimal power flow problem for resistive DC networks. The gradient method algorithm is written in a port-Hamiltonian form and the stability of the resulting dynamics is studied. Stability conditions ...
  • A bi-objective parallel machine problem with eligibility, release dates and delivery times of the jobs 

    Mateo Doll, Manuel; Teghem, Jacques; Tuyttens, Daniel (Taylor & Francis, 2017-08-01)
    Article
    Accés restringit per política de l'editorial
    The scheduling of parallel machines is a well-known problem in many companies. Nevertheless, not always all the jobs can be manufactured in any machine and the eligibility appears. Based on a real-life problem, we present ...
  • Using discrete-time mathematical programming to optimise the extraction rate of a durable non-renewabre resource with a single primary supplier 

    Corominas Subias, Albert (Elsevier, 2017-09)
    Article
    Accés obert
    A non-linear discrete-time mathematical program model is proposed to determining the optimal extrac- tion policy for a single primary supplier of a durable non-renewable resource, such as gemstones or some metals. Karush, ...
  • Renewable microgrid projects for autonomous small-scale electrification in Andean countries 

    López González, Alejandro; Domenech Léga, Bruno; González Hernández, Dorian; Ferrer Martí, Laia (2017-11)
    Article
    Accés restringit per política de l'editorial
    Nowadays, 84% of the world population without access to electricity is located in rural areas of developing countries. In particular, in the Andean countries, about 10.4 million people lack of access to electricity, mainly ...
  • Improving the resolution of the simple assembly line balancing problem type E 

    Corominas Subias, Albert; García Villoria, Alberto; Pastor Moreno, Rafael (Institut d'Estadística de Catalunya, 2016-07-01)
    Article
    Accés obert
    The simple assembly line balancing problem type E (abbreviated as SALBP-E) occurs when the number of workstations and the cycle time are variables and the objective is to maximise the line efficiency. In contrast with other ...
  • The multi-objective assembly line worker integration and balancing problem of type-2 

    Moreira, Mayron César O.; Pastor Moreno, Rafael; Costa, Alysson E.; Miralles, Cristobal (2017-06-01)
    Article
    Accés restringit per política de l'editorial
    The consideration of worker heterogeneity in assembly lines has received a fair amount of attention in the literature in the past decade. Most of this exploration uses as motivation the example of assembly lines in sheltered ...
  • Efficient heuristics for the parallel blocking flow shop scheduling problem 

    Ribas Vila, Immaculada; Companys Pascual, Ramon; Tort-Martorell Llabrés, Xavier (2017-05-15)
    Article
    Accés restringit per política de l'editorial
    We consider the NP-hard problem of scheduling n jobs in F identical parallel flow shops, each consisting of a series of m machines, and doing so with a blocking constraint. The applied criterion is to minimize the makespan, ...
  • Social networks and performance in distributed learning communities 

    Cadima, Rita; Ojeda Rodríguez, Jordi; Monguet Fierro, José María (2012-10)
    Article
    Accés obert
    Social networks play an essential role in learning environments as a key channel for knowledge sharing and students' support. In distributed learning communities, knowledge sharing does not occur as spontaneously as when ...
  • Calibrating cross-training to meet demand mix variation and employee absence 

    Olivella Nadal, Jordi; Nembhard, David (Elsevier, 2016-01-16)
    Article
    Accés restringit per política de l'editorial
    We address the problem of determining the cross-training that a work team needs in order to cope with demand mix variation and absences. We consider the case in which all workers can be trained on all tasks, the workforce ...
  • Una visión sobre secuencias regulares 

    Bautista Valhondo, Joaquín; Companys Pascual, Ramon; Corominas Subias, Albert (Sociedad de Estadística e Investigación Operativa (SEIO), 1996-06)
    Article
    Accés obert
    En los últimos años el laboratorio de Organización de la Producción (LOP) del departamento de Organización de Empresas de la UPC ha venido desarrollando una serie de trabajos sobre diversos problemas en el campo de la ...

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