Now showing items 1919-1938 of 79656

  • A manera d'editorial 

    Barceló García, Miquel (Càtedra UNESCOde Sostenibilitat de la UPC, 2001-05)
    Article
    Open Access
  • A manera d'editorial 

    Carrera Gallissà, Enric (Càtedra UNESCO de Sostenibilitat de la UPC, 2008-12)
    Article
    Open Access
  • A manera d'editorial 

    Cendra Garreta, Jaime (Càtedra UNESCO de Sostenibilitat de la UPC, 2007-05)
    Article
    Open Access
  • A manera d'editorial 

    Barceló García, Miquel (Càtedra UNESCO de Sostenibilitat de la UPC, 2006-05)
    Article
    Open Access
  • A Manera d'editorial: biotecnologies i societat 

    Barceló García, Miquel (Càtedra UNESCO a la UPC de Sostenibilitat, 2000-04)
    Article
    Open Access
  • A MAP approach for convex non-negative matrix factorization in the diagnosis of brain tumors 

    Vilamala Muñoz, Albert; Belanche Muñoz, Luis Antonio; Vellido Alcacena, Alfredo (2014)
    Conference report
    Restricted access - publisher's policy
    Convex non-negative matrix factorization is a blind signal separation technique that has previously demonstrated to be well-suited for the task of human brain tumor diagnosis from magnetic resonance spectroscopy data. This ...
  • A map characterizing the fuzzy points and columns of a T-indistinguishability operator 

    Boixader Ibáñez, Dionís; Recasens Ferrés, Jorge (2005-10)
    Article
    Open Access
    A new map (ΛE) between fuzzy subsets of a universe X endowed with a T-indistinguishability operator E is introduced. The main feature of ΛE is that it has the columns of E as fixed points, and thus it provides us with a ...
  • A margin adaptive scheduling algorithm for FBMC/OQAM systems 

    Caus López, Marius; Pérez Neira, Ana Isabel; Moretti, Marco; Kliks, Adrian (2014)
    Conference report
    Restricted access - publisher's policy
    This paper addresses the margin adaptive problem for the filter bank multicarrier (FBMC) modulation based on the offset QAM (OQAM), referred to as FBMC/OQAM. The analysis conducted in this paper reveals that due to the ...
  • A massive data processing approach for effective trustworthiness in online learning groups 

    Miguel, Jorge; Caballé Llobet, Santiago; Xhafa Xhafa, Fatos; Prieto, Josep (2015-06-10)
    Article
    Open Access
    This paper proposes a trustworthiness-based approach for the design of secure learning activities in online learning groups. Although computer-supported collaborative learning has been widely adopted in many educational ...
  • A materialidade da luz. A imaterialidade do sólido. Casa Guiette. Antuérpia 1926. 

    Lepori, Ana Paula de Oliveira (Associació d'idees. Centre d'Investigacions Estètiques, 2005)
    Article
    Open Access
  • A mathematical approach and review of the modeling of taxi services 

    Estrada Romeu, Miguel Ángel; Salanova Grau, Josep Maria (2012)
    Conference report
    Restricted access - publisher's policy
    This paper presents a mathematical model for the estimation of the key performance indicators of the taxi markets in urban areas. These key parameters are basically the demand and supply for taxi services, the waiting time ...
  • A Mathematical Autobiographity 

    Goldberg, Michael (Université du Quebéc à Montréal / Université du Quebéc à Montréal, 1980)
    Article
    Open Access
    Extrait de son autobiographie mathématique. “Mes recherches mathématiques proviennent en partie de l’intérèt que je Porte aux problèmes de dissection. J’ai montré, par exemple, comment découper un pentagone régulier en six ...
  • A mathematical framework for structural control integration 

    Rossell Garriga, Josep Maria; Rodellar Benedé, José; Palacios Quiñonero, Francisco; Rubió Massegú, Josep (Trans Tech Publications, 2012)
    Conference report
    Open Access
    In this paper, some control strategies to design decentralized controllers are developed and discussed. These strategies are based on the Inclusion Principle, a very useful mathematical framework to obtain decentralized ...
  • A mathematical model for dynamic memory networks 

    Fàbrega Canudas, José; Fiol Mora, Miquel Àngel; Serra Albó, Oriol; Andrés Yebra, José Luis (Iniciativa Digital Politècnica, 2011)
    Conference report
    Open Access
    The aim of this paper is to bring together the work done several years ago by M.A. Fiol and the other authors to formulate a quite general mathematical model for a kind of permutation networks known as dynamic memories. A ...
  • A mathematical model of refinery operations characterised by complete horizontal integration of subsystems from purchase to product distribution 

    Alabi, Adebayo Adejare; Castro Pérez, Jordi (2009)
    Article
    Restricted access - publisher's policy
    Refinery economics are extremely complex and involve massive amounts of operational data and decision-making processes; therefore, most refinery planners model and solve each sub-problem sequentially and independently. ...
  • A Mathematical model of the spread of two viral sub-types on a Plant Leaf (Numerical Simulation) 

    Ramchand Lalwani, Nitin (Universitat Politècnica de Catalunya, 2015-06)
    Master thesis
    Restricted access - author's decision
    Whilst in humans free virus particles and host cells are assumed to be homogenously mixed, in plants, the spatial component is a key factor. The natural proliferation of the virus through a plant is known to happen from a ...
  • A mathematical model to study railway track dynamics for the prediction of vibration levels generated by rail vehicles 

    Otero Yugat, Jesús; Martínez Miralles, Jordi Ramon; Santos López, M. Antonia de los; Cardona Foix, Salvador (2012-01)
    Article
    Open Access
    This article presents a mathematical model aimed at predicting wheel–rail contact vibration force arising from wheel profile irregularities. Prediction of vibrations caused by a passing train is a basic factor in environmental ...
  • A mathematical programming approach for different scenarios of bilateral bartering 

    Nasini, Stefano; Castro, Jordi; Fonseca, Pau (Institut d'Estadística de Catalunya, 2015-06)
    Article
    Open Access
    The analysis of markets with indivisible goods and fixed exogenous prices has played an important role in economic models, especially in relation to wage rigidity and unemployment. This paper provides a novel mathematical ...
  • A mathematical programming approach for different scenarios of bilateral bartering 

    Nasini, Stefano; Castro Pérez, Jordi; Fonseca Casas, Pau (Institut d'Estadística de Catalunya, 2015-01-01)
    Article
    Open Access
    The analysis of markets with indivisible goods and fixed exogenous prices has played an important role in economic models, especially in relation to wage rigidity and unemployment. This paper provides a novel mathematical ...
  • A matrix derivation of a representation theorem for (trAp)1/p 

    Neudecker, Heinz (Universitat Politècnica de Catalunya. Centre de Càlcul, 1989)
    Article
    Open Access
    A matrix derivation of a well-known representation theorem for (tr Ap)1/p is given, which is the solution of a restricted maximization problem. The paper further gives a solution of the corresponding restricted minimization ...