Now showing items 1-20 of 70

    • A cellular decomposition of the manifold of observable conditioned invariant subspaces 

      Puerta Sales, Ferran; Puerta Coll, Xavier; Zaballa, Ion (2000)
      Article
      Open Access
      Given an observable system defined by a pair of matrices $(C,A)$ we obtain a cellular decomposition of the manifold of $(C,A)$-conditioned invariant subspaces having the restricted system fixed observability indices and ...
    • A chaotic secure communication scheme based on duffing oscillators and frequency estimation 

      Zapateiro, Mauricio; Vidal Seguí, Yolanda; Acho Zuppa, Leonardo (2013)
      Conference report
      Open Access
      This work presents a new technique to securely transmit and retrieve a message signal via chaotic systems. In our system, a two-valued message signal modulates the frequency of a Duffing oscillator sinusoidal term. An ...
    • A geometric approach to the Carlson problem 

      Compta Creus, Albert; Ferrer Llop, Josep (Society for Industrial and Applied Mathematics (Filadèlfia), 2000)
      Article
      Open Access
      The possible observability indices of an observable pair of matrices, when supplementary subpairs are prescribed, are characterized when the “quotient” one is nilpotent. The geometric techniques used are also valid in the ...
    • A geometrical aprroach to C<sup>p</sup>-globalization of pointwise matricial relations 

      Puerta Sales, Ferran; Puerta Coll, Xavier (1999)
      External research report
      Open Access
    • A tool for analyzing and fixing infeasible RCTA instances 

      Castro Pérez, Jordi; González Alastrué, José Antonio (2010-09)
      Article
      Restricted access - publisher's policy
      Minimum-distance controlled tabular adjustment methods (CTA), and its restricted variants (RCTA), is a recent perturbative approach for tabular data protection. Given a table to be protected, the purpose of RCTA is to find ...
    • Active learning in learning communities: toward an autonomous and shared learning 

      Parada, Natalia; Gutierrez, Angel (Active Learning for Engineering Education (ALE), 2009)
      Conference report
      Open Access
      Starting with our work on organizational redesign in different Colombian organizations, we have advanced in the concepts of Learning Communities, Shared and Permanent Learning, Flexible Organizational Structure, Participative ...
    • Algebraic PGD for tensor separation and compression: an algorithmic approach 

      Díez, Pedro; Zlotnik, Sergio; García González, Alberto; Huerta, Antonio (2018-07)
      Article
      Open Access
      Proper Generalized Decomposition (PGD) is devised as a computational method to solve high-dimensional boundary value problems (where many dimensions are associated with the space of parameters defining the problem). The ...
    • Alimentación de modelos cuantitativos con información subjetiva: aplicación Delphi en la elaboración de un modelo de imputación del gasto turístico individual en Catalunya 

      Landeta Rodríguez, J.; Matey de Antonio, J.; Ruíz Herrán, V.; Villarreal Larrinaga, O. (Institut d'Estadística de Catalunya, 2002)
      Article
      Open Access
      El presente artículo presenta un estudio realizado para el Institut d'Estadística de Catalunya, donde se ha aplicado una técnica que trabaja con información subjetiva (el Método Delphi) para obtener unos datos que puedan ...
    • An exact algorithm for the mixed-model level scheduling problem 

      Pereira Gude, Jordi; Vilà Bonilla, Mariona (Taylor & Francis, 2015-02-05)
      Article
      Open Access
      The Monden Problem, also known as the Output Rate Variation Problem, is one of the original formulations for mixed-model assembly line-level scheduling problems in a just-in-time system. In this paper, we develop a new ...
    • Analyzing the performance of a miniature 3D wind sensor for Mars 

      Domínguez Pumar, Manuel; Kowalski, Lukasz; Jiménez Serres, Vicente; Rodríguez Pérez, Ivette María; Soria Guerrero, Manel; Bermejo Broto, Sandra; Pons Nin, Joan (Multidisciplinary Digital Publishing Institute (MDPI), 2020-10-20)
      Article
      Open Access
      This paper analyzes the behavior of a miniature 3D wind sensor designed for Mars atmosphere. The sensor is a spherical structure of 10 mm diameter divided in four sectors. By setting all the sectors to constant temperature, ...
    • Application to the proximal point algorithm to the general traffic assignment problem 

      Codina Sancho, Esteve; Montero Mercadé, Lídia (Edicions de la Universitat de Lleida, 2003)
      Conference report
      Open Access
      An adaptation of the proximal algorithm for the traffic assignment problem under a user equilibrium formulation for a general asymmetric traffic network is presented in this paper, following the recently published results ...
    • Autorreferencialidad, tecnología y desarrollo sostenible: hacia la autopoiesis reflexiva 

      Pont Vidal, Josep (UPC. Cátedra Unesco de Sostenibilidad, 2013-12)
      Article
      Open Access
      La relación entre tecnología, sociedad y desarrollo sostenible se ha realizado habitualmente en base a variaciones fundamentadas de la teoría general de sistemas, basada en el entendimiento sistémico de la causalidad ...
    • Barcelona Virtual Mobility Lab: the multimodal transport simulation testbed for emerging mobility concepts evaluation 

      Montero Mercadé, Lídia; Linares Herreros, María Paz; Salmeron Moya, Juan; Recio, Gonzalo; Lorente, Ester; Vázquez, Juan José (International Academy, Research, and Industry Association (IARIA), 2018)
      Conference report
      Open Access
      New sustainable mobility concepts and smart resilient ideas are arising every day. However, there is not an easy way to bring these ideas into reality, or to test how good they are as mobility solutions. Virtual Mobility ...
    • Bounding the distance of a controllable and observable system to an uncontrollable or unobservable one 

      Clotet Juan, Josep; García Planas, María Isabel (1999)
      Article
      Open Access
      Let $(A,B,C)$ be a triple of matrices representing a time-invariant linear system $\left .\aligned \dot x(t)&=Ax(t)+Bu(t)\\y(t)&=Cx(t)\endaligned \right \}$ under similarity equivalence, corresponding to a realization ...
    • Bounding the distance of a controllable system to an uncontrollable one 

      Clotet Juan, Josep; García Planas, María Isabel (1998)
      Article
      Open Access
      Let $(A,B)$ be a pair of matrices representing a time-invariant linear system $\dot x(t)=Ax(t)+Bu(t)$ under block-similarity equivalence. In this paper we measure the distance between a controllable pair of matrices ...
    • Calibración de parámetros de modelización en el simulador de tráfico AIMSUN2 

      Izquierdo Vigil, Miguel Ángel; Moreno Magdaleno, José Antonio (Universitat Politècnica de Catalunya, 1999-05)
      Master thesis (pre-Bologna period)
      Open Access
      Estudiar la influencia de diversos parámetros, relacionados con los modelos de comportamiento de vehículos, en los resultados producidos por el simulador A1MSUN2.El proyecto constará de dos partes: · en la primera ...
    • Classification and versal deformation of generalized flags 

      Puerta Coll, Xavier (2003)
      Article
      Open Access
      A natural equivalence relation can be considered in the generalized flag manifold. First we give a complete set of invariants of it as well as a canonical matrix description of the classes. Next we consider parametric ...
    • Control de sistemes no holònoms mitjançant la forma normal de Goursat 

      Manzanera Garrido, Ana; Valero Martínez, Gemma (Universitat Politècnica de Catalunya, 2013-07)
      Master thesis (pre-Bologna period)
      Open Access
      La principal contribució d'aquest treball és donar les eines i les pautes necessàries per a la linealització per realimentació dels sistemes no holònoms de dues entrades a través del disseny de la forma normal de Goursat. ...
    • Control of robotic systems using differential flatness 

      Belda Ferrín, Guillem (Universitat Politècnica de Catalunya, 2015-07)
      Master thesis
      Open Access
      In this work, a coordinate change of state variables is performed for drift-less systems of dimension m+2 with 2 inputs using Goursat Normal Form. Then, we define a feedback law that will allow us to convert the original ...
    • Controllability of $\ell$-order linear systems 

      García Planas, María Isabel (2003)
      Article
      Open Access
      Given a (` + 1)-ple of matrices (A`¡1; : : : ;A0;B) representing `- order time-invariant linear systems, x(`) = A`¡1x(`¡1) + : : : + A0x(0) + Bu, we analyze conditions in such a way that changing the control u by u1 = u ...