Now showing items 1-17 of 17

    • A heuristic method for a congested capacitated transit assignment model with strategies 

      Codina Sancho, Esteve; Rosell Camps, Francisca (2017-12)
      Article
      Open Access
      This paper addresses the problem of solving the congested transit assignment problem with strict capacities. The model under consideration is the extension made by Cominetti and Correa (2001), for which the only solution ...
    • Anàlisi de resultats: Ninja Trader vs Visual Chart 

      Caminal Bobet, Aleix (Universitat Politècnica de Catalunya, 2013-09)
      Master thesis (pre-Bologna period)
      Open Access
      En aquest projecte, es fa una anàlisi entre 2 programes de Trading que són el Ninja Trader i el Visual Chart, a partir d'un històric del Ibex-35 des de l'1 de gener de 2008 (obtingut amb Visual Chart). S'apliquen 4 sistemes ...
    • Characterizing path-like trees from linear configurations 

      López Masip, Susana Clara (2017)
      Conference lecture
      Open Access
      Assume that we embed the path Pn as a subgraph of a 2-dimensional grid, namely, Pk¿Pl. Given such an embedding, we consider the ordered set of subpaths L1, L2,...,Lm which are maximal straight segments in the embedding, ...
    • Computational cost of the Fekete problem 

      Bendito Pérez, Enrique; Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Gesto Beiroa, José Manuel (2007-10-11)
      Article
      Open Access
      We present here strong numerical and statistical evidence of the fact that the Smale's 7th problem can be answered affirmatively. In particular, we show that a local minimum for the logarithmic potential energy in the ...
    • Controllability of second order linear systems 

      Clotet Juan, Josep; García Planas, María Isabel (2003)
      Article
      Open Access
      Let (A1;A2;B) be a triple of matrices representing two-order time-invariant linear systems, ¨x = A1 ˙ x+A2x+Bu. Using linearization process we study the controllability of second order linear systems. We obtain su±cient ...
    • Nonlinear Systems Identification Using Additive Dynamic Neural Networks--Two On Line Approaches. 

      Griñó Cubero, Robert; Cembrano Gennari, Gabriela; Torras, Carme (Institute of Electrical and Electronics Engineers (IEEE), 2000-02)
      Article
      Open Access
      This paper proposes a class of additive dynamic connectionist (ADC) models for identification of unknown dynamic systems. These models work in continuous time and are linear in their parameters. Also, for this kind of model ...
    • Nonlocal phase transitions in homogeneous and periodic media 

      Cozzi, Matteo; Dipierro, Serena; Valdinoci, Enrico (2017-03-01)
      Article
      Open Access
      We discuss some results related to a phase transition model in which the potential energy induced by a double-well function is balanced by a fractional elastic energy. In particular, we present asymptotic results (such as ...
    • Optimisation problems with ODE constraints 

      Miramunt Mases, Martí (Universitat Politècnica de Catalunya, 2022-01)
      Bachelor thesis
      Open Access
      Finding solution methods to optimisation problems has been an area of interest in mathematics for centuries. In this project, we aim to find the solution of an optimisation problem subject to an ODE using different numerical ...
    • Optimisation problems with ODE/PDE constraints 

      Armengou Riera, Neus (Universitat Politècnica de Catalunya, 2022-07)
      Bachelor thesis
      Open Access
      Optimisation problems are used to find the best solution from all the possible ones, usually with some constraints. If this constraints are related with physics, it is very common to use differential equations to describe ...
    • Principios variacionales de orden superior y con funciones de varias variables 

      Páez Sánchez, Jordi (Universitat Politècnica de Catalunya, 2014-07)
      Bachelor thesis
      Open Access
      En esta memoria se trata de extender el principio variacional unidimensional de primer orden de Hamilton a los siguientes casos: principio variacional de orden superior con funciones de una variable, principio variacional ...
    • Principis variacionals en Relativitat General: lagrangianes de Hilbert i de Palatini 

      Gabarró Solanas, Marta (Universitat Politècnica de Catalunya, 2021-01)
      Bachelor thesis
      Open Access
      La teoria de la Relativitat General és una teoria geomètrica de la gravetat que generalitza la teoria de la Relativitat Especial i les lleis newtonianes de la Gravitació, presentant la gravetat com la curvatura de ...
    • Revisión crítica de la utilización del método del gradiente conjugado y extensiones en la minimización de funciones nolineales con condiciones 

      Escudero, L. F. (Universitat Politècnica de Barcelona. Centre de Càlcul, 1984-12)
      Article
      Open Access
      En este trabajo se efectúa una revisión de la aplicación del método del gradiente conjugado (diseñado para resolver sistemas de ecuaciones lineales) a la optimización de funciones no lineales (no cuadráticas) en el conjunto ...
    • The extremal solution for the fractional Laplacian 

      Ros Oton, Xavier; Serra Montolí, Joaquim (2014-07-01)
      Article
      Restricted access - publisher's policy
      We study the extremal solution for the problem (-¿)su=¿f(u) in O , u=0 in Rn\O , where ¿>0 is a parameter and s¿(0,1) . We extend some well known results for the extremal solution when the operator is the Laplacian to this ...
    • The MIT Bag Model as an infinite mass limit 

      Arrizabalaga, Naiara; Mas Blesa, Albert (Cellule MathDoc/CEDRAM, 2019-06-12)
      Article
      Open Access
    • Trajectory optimization techniques for closed-chain motion planning 

      Lemaitre Moreno, Edgar (Universitat Politècnica de Catalunya, 2018-01)
      Master thesis
      Restricted access - confidentiality agreement
      Covenantee:   Institut de Robòtica i Informàtica Industrial
    • Una aplicación de la teoría de Dubovickii y Miljutin a la programación semi-infinita convexa 

      López Cerdá, Marco A.; Vercher, Enriqueta (Universitat Politècnica de Barcelona. Centre de Càlcul, 1984-12)
      Article
      Open Access
      En este trabajo aplicamos la teoría de Dubovickii y Miljutin para deducir una condición necesaria de optimalidad relativa al problema de Programación Semi-Infinita convexa no diferenciable, asumiendo la cualificación de ...
    • Vertex-transitive graphs that remain connected after failure of a vertex an its neighbors 

      Hamidoune, Yahya Ould; Lladó Sánchez, Ana M.; López Masip, Susana Clara (Wiley InterScience, 2010)
      Article
      Restricted access - publisher's policy
      A d-regular graph is said to be superconnected if any disconnecting subset with cardinality at most d is formed by the neighbors of some vertex. A superconnected graph that remains connected after the failure of a vertex ...