Ara es mostren els items 57-76 de 81

    • On the effect of friend feedbacks 

      Compta Creus, Albert; Ferrer Llop, Josep; Peña Carrera, Marta (2009)
      Article
      Accés obert
      Given S an (A;B)-invariant subspace, we prove that the set of friend feedbacks is a (nm¡md+dq)-dimensional linear variety, which can be considered as the direct sum of the feedbacks of the restriction to S and the ...
    • On the effect of friend feedbacks 

      Compta Creus, Albert; Ferrer Llop, Josep; Peña Carrera, Marta (2011)
      Article
      Accés restringit per política de l'editorial
      Given S an (A,B)-invariant subspace, we prove that the set of friend feedbacks is a linear variety, which can be considered as the direct sum of the feedbacks of the restriction to S and the co-restriction to S ⊥. In ...
    • Output regulation problem for differentiable families of linear systems 

      Compta Creus, Albert; Ferrer Llop, Josep; Peña Carrera, Marta (2010)
      Article
      Accés obert
      Given a family of linear systems depending on a parameter varying in a differentiable manifold, we obtain sufficient conditions for the existence of a (global or local) differentiable family of controllers solving the ...
    • Output regulation problem for differentiable families of linear systems 

      Compta Creus, Albert; Ferrer Llop, Josep; Peña Carrera, Marta (2009)
      Article
      Accés obert
      Given a family of linear systems depending on a parameter varying in a differentiable manifold, we obtain sufficient conditions for the existence of a (global or local) differentiable family of controllers solving the ...
    • Perturbations preserving conditioned invariant subspaces 

      Peña Carrera, Marta; Compta Creus, Albert; Ferrer Llop, Josep (2010)
      Comunicació de congrés
      Accés obert
      Given the set of matrix pairs M ⊂ Mm,n(C) × Mn(C) keeping a subspace S ⊂ Cn invariant, we obtain a miniversal deformation of a pair belonging to an open dense subset of M. It generalizes the known results when S is a ...
    • Perturbations preserving conditioned invariant subspaces 

      Compta Creus, Albert; Ferrer Llop, Josep; Peña Carrera, Marta (2011)
      Article
      Accés restringit per política de l'editorial
      Given the set of matrix pairsM Mm,n.C/ Mn.C/ keeping a subspace S Cn invariant, we obtain a miniversal deformation of a pair belonging to an open dense subset ofM. It generalizes the known results when S is a ...
    • Perturbed marked reduced forms of invariant subspaces 

      Compta Creus, Albert; Ferrer Llop, Josep; Peña Carrera, Marta (Elsevier, 2018-12-15)
      Article
      Accés obert
      The classification of invariant subspaces is an open problem related to other important ones like the Carlson problem. Here we obtain a reduced form of these invariant subspaces as a new tool to tackle these problems. In ...
    • Planar bimodal piecewise linear systems. Bifurcation diagrams 

      Ferrer Llop, Josep; Magret Planas, Maria dels Dolors; Pacha Andújar, Juan Ramón; Peña Carrera, Marta (2010)
      Article
      Accés obert
    • Prólogo 

      Ferrer Llop, Josep (Mundiprensa, 2006)
      Article
      Accés obert
      Prólogo del Informe "La educación superior en el mundo 2006: La financiación de las universidades"
    • Regularity of the Brunovsky-Kronecker stratification 

      Ferrer Llop, Josep; García Planas, María Isabel; Puerta Sales, Ferran (1998)
      Article
      Accés obert
      We study the partition of the set of pairs of matrices according to the Brunovsky- Kronecker type. We show that it is a constructible stratification, and that it is Whitney regular when the second matrix is a column matrix. ...
    • Salutació 

      Ferrer Llop, Josep (Càtedra UNESCO a la UPC de Sostenibilitat, 2005-05)
      Article
      Accés obert
    • Salutació 

      Ferrer Llop, Josep (Càtedra UNESCO de Sostenibilitat de la UPC, 2003-05)
      Article
      Accés obert
    • Salutació 

      Ferrer Llop, Josep (Càtedra Unesco de Sostenibilitat de la UPC, 2004-05)
      Ressenya
      Accés obert
    • State canonical form for a class of uncontrollable linear systems 

      Compta Creus, Albert; Ferrer Llop, Josep; Peña Carrera, Marta (Taylor & Francis, 2019-10-16)
      Article
      Accés obert
      We tackle the obtaining of canonical forms for classifying linear control systems with regard to changes in the state variables. Although it was solved in the 1980s for controllable systems, it is still an open problem for ...
    • Stratification and bundle structure of the set of conditioned invariant subspaces in the general case 

      Ferrer Llop, Josep; Puerta Sales, Ferran; Puerta Coll, Xavier (2000)
      Article
      Accés obert
      We extend some known results about the smooth stratification of the set of conditioned invariant subspaces for a general pair $(C,A)\in\w C^n\times\w C^{n+m}$ without any assumption on the observability. More precisely ...
    • Stratification and bundle structure of the set of conditioned invariant subspaces in the general case 

      Ferrer Llop, Josep; Puerta Sales, Ferran; Puerta Coll, Xavier (2003)
      Article
      Accés obert
      We extend some known results about the smooth stratification of the set of conditioned invariant subspaces for a general pair $(C,A)\in\w C^n\times\w C^{n+m}$ without any assumption on the observability. More precisely ...
    • Stratification and bundle structure of the set of general (A,B)-invariant subspaces 

      Ferrer Llop, Josep; Puerta Sales, Ferran; Puerta Coll, Xavier (1998)
      Article
      Accés obert
      Given (A,B) in Hom(C^(n+m) C^n), we prove that the set of (A,B)-invariant subspaces having a fixed Brunovsky-Kronecker structure is a submanifold of the corresponding grassman manifold, and we compute its dimension. Also, ...
    • Structural stability of planar bimodal linear systems 

      Ferrer Llop, Josep; Peña Carrera, Marta; Susín Sánchez, Antonio (2014-01-01)
      Article
      Accés obert
      Structural stability ensures that the qualitative behavior of a system is preserved under small perturbations. We study it for planar bimodal linear dynamical systems, that is, systems consisting of two linear dynamics ...
    • Structural stability of planar bimodal linear systems 

      Ferrer Llop, Josep; Peña Carrera, Marta; Susín Sánchez, Antonio (American Institute of Physics (AIP), 2013)
      Text en actes de congrés
      Accés obert
      We consider bimodal linear dynamical systems consisting of two linear dynamics acting on each side of a given hyperplane, assuming continuity along the separating hyperplane. Focusing in the planar case, we describe which ...
    • Switched singular linear systems 

      Clotet Juan, Josep; Ferrer Llop, Josep; Magret Planas, Maria dels Dolors (IEEE Press. Institute of Electrical and Electronics Engineers, 2009-06)
      Text en actes de congrés
      Accés obert
      We consider switched singular linear systems and determine the set of reachable/controllable states. We derive necessary and sufficient conditions for such a system to be reachable/controllable when an “equisingularity ...