Exploració per tema "Manifolds"

Ara es mostren els items 1-10 de 10

    • Array-geometry invariant signaling for MISO feedforward opportunistic communications 

      Borràs Pino, Jordi; Vázquez Grau, Gregorio (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Text en actes de congrés
      Accés obert
      The impact of antenna array geometry on scenario- aware invariant signaling is studied in the context of feedforward opportunistic communications. Invariance plays an elemental role to guarantee the detectability in ...

    • Computation of libration point orbits and manifolds using collocation methods 

      Rogov, Kirill (Universitat Politècnica de Catalunya, 2016-07-13)
      Projecte Final de Màster Oficial
      Accés obert
      This thesis contains a methodology whose aim is to compute trajectories describing natural motion of the phase space in a neighborhood of Libtation points and stable/unstable manifolds which correspond to these orbits in ...

    • Critical velocity in kink solutions of the sine-Gordon equation 

      Sanchis Ramírez, Guillem (Universitat Politècnica de Catalunya, 2017-07)
      Projecte Final de Màster Oficial
      Accés obert
      The goal of this work is to present a way to deduce the value of the critical velocity observed in soliton-like solutions of a perturbed version of the sine-Gordon equation. To do so, an ODE system is obtained from the ...

    • Free form surfaces 

      Cotrina Navau, Josep; Pla García, Núria (2000-05)
      Report de recerca
      Accés obert
      A method to construct continuous order k surfaces of arbitrary topological type by tracing a mesh that represents a 2-manifold is presented. The presented approach constructs the surface from a collection of pieces which ...

    • Increased conductivity of a hole transport layer due to oxidation by a molecular nanomagnet - art. no. 096110 

      Cheylan, Stephanie; Puigdollers i González, Joaquim; Bolink, H J; Coronado, E; Voz Sánchez, Cristóbal; Alcubilla González, Ramón; Badenes, G (American Institute of Physics (AIP), 2008-05)
      Article
      Accés restringit per política de l'editorial
      Thin film transistors based on polyarylamine poly(N,N'-diphenyl-N,N'bis(4-hexylphenyl)-[1,1'biphenyl]-4,4'-diamine (pTPD) were fabricated using spin coating in order to measure the mobility of pTPD upon oxidation. Partially ...

    • On the k-symplectic, k-cosymplectic and multisymplectic formalisms of classical field theories 

      Román Roy, Narciso; Rey, Angel M.; Salgado, Modesto; Vilariño, Silvia (American Institute of Mathematical Sciences, 2011-03)
      Article
      Accés restringit per política de l'editorial
      The objective of this work is twofold: First, we analyze the relation between the k-cosymplectic and the k-symplectic Hamiltonian and Lagrangian formalisms in classical eld theories. In particular, we prove the equivalence ...

    • Randomized kinodynamic planning for constrained systems 

      Bordalba Llaberia, Ricard; Ros Giralt, Lluís; Porta Pleite, Josep Maria (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Text en actes de congrés
      Accés obert
      Kinodynamic RRT planners are considered to be general tools for effectively finding feasible trajectories for high-dimensional dynamical systems. However, they struggle when holonomic constraints are present in the system, ...

    • Sliding modes in a class of complex-valued nonlinear systems 

      Dòria Cerezo, Arnau; Olm Miras, Josep Maria; Biel Solé, Domingo; Fossas Colet, Enric (2021-07)
      Article
      Accés obert
      A number of physical systems allow a complex-valued representation. This article extends the theory of sliding modes to a class of nonlinear systems described by complex-valued variables. Hence, states, parameters, control ...

    • Study of manifold geometry using non-negative kernel graphs 

      Hurtado Comín, Carlos (Universitat Politècnica de Catalunya, 2022-10-21)
      Treball Final de Grau
      Accés obert
      Amb l'augment de la mida de les dades, els sistemes efectius de reducció de la dimensionalitat s'han tornat necessaris per una gran varietat de tasques. Un conjunt de dades es pot caracteritzar per les seves propietats ...

    • Towards free form surfaces 

      Cotrina Navau, Josep; Pla García, Núria; Vigo Anglada, Marc (2001-03)
      Report de recerca
      Accés obert
      A theoretical approach to construct free form surfaces is presented. We develop the conceps that arise when a free form surface is generated by tracing a mesh, using differentiable manifold theory, and generalizing the ...