Exploració per altres contribucions "Delshams Valdés, Amadeu"
Ara es mostren els items 1-11 de 11
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Circular economy in the automotive sector
(Universitat Politècnica de Catalunya, 2023-10-04)
Treball Final de Grau
Accés obert
Realitzat a/amb: VolkswagenThroughout this Thesis, the current automotive sector and its limitations have been studied with the aim of presenting a proposal to minimise the environmental impact of this industry. This project is based on the ... -
Coordinate systems used to study the Elliptic Restricted Three Body Problem
(Universitat Politècnica de Catalunya, 2019-05)
Projecte Final de Màster Oficial
Accés obertMy work focuses on the Elliptic Restricted Three body problem and the coordinate systems used within this restrictive problem. It focuses on the pulsating coordinates and the sidereal coordinates and comes to the conclusion ... -
Diffusion through non-transverse heteroclinic chains : a long-time instability for the NLS
(Universitat Politècnica de Catalunya, 2015-07-06)
Tesi
Accés obertEn l'article [CKSTT] els autors proven una inestabilitat global per a l'equació de Schrödinger cúbica desenfocant en el tor 2-dimensional. Per aconseguir-ho, detecten un sistema finit d'equacions diferencials ordinàries, ... -
Global instability in Hamiltonian systems
(Universitat Politècnica de Catalunya, 2018-07-11)
Tesi
Accés obertIn Chapters 1 and 2 of this thesis, we prove that for any non-trivial perturbation depending on any two independent harmonics of a pendulum and a rotor there is global instability. The proof is based on the geometrical ... -
Global instability in the elliptic restricted three body problem
(Universitat Politècnica de Catalunya, 2014-06-16)
Tesi
Accés obertThe goal of this thesis is to show global instability or Arnold's diffusion in the elliptic restricted three body problem (ERTBP) by proving the existence of pseudo-trajectories diffusing along the phase space for certain ... -
Homoclinic phenomena in conservative systems
(Universitat Politècnica de Catalunya, 2013-04-29)
Tesi
Accés obertThe goal of this thesis is the study of homoclinic orbits in conservative systems (area-preserving maps and Hamiltonian systems). We consider homoclinic (bi-asymptotic) orbits either to saddle periodic orbits or to whiskered ... -
New geometrical and dynamical techniques for problems in celestial mechanics
(Universitat Politècnica de Catalunya, 2021-02-17)
Tesi
Accés obertIn this thesis, we study the application of symplectic geometry, regular and singular, to symplectic dynamical systems.We start with a motivating case: the relation between symplectic foliations and global transverse ... -
Numerical study of hopf bifurcations in the two-dimensional plane poiseuille flow
(Universitat Politècnica de Catalunya, 2002-11-28)
Tesi
Accés obertIn this work we try to analyse the dynamics of the Navier-Stokes equations in a problem without domain complexities as is the case of the plane Poiseuille flow. The Poiseuille problem is described as the flow of a viscous ... -
On Normal Forms and Splitting of Separatrices in Reversible Systems
(Universitat Politècnica de Catalunya, 2003-10-23)
Tesi
Accés obertÉs difícil dibuixar una frontera, dins la Teoria de Sistemas Dinàmics, entre lleis de conservació i simetries doncs, sovint, les seves característiques es confonen. Un clar exemple d'aquest fenómen el constitueixen els ... -
The role of hyperbolic invariant objects: From Arnold diffusion to biological clocks
(Universitat Politècnica de Catalunya, 2008-10-16)
Tesi
Accés obertEl marc d'aquesta tesi són els objectes invariants hiperbòlics (tors amb bigotis, cicles límit, NHIM,. . .), que constitueixen, per aquesta tesi, els objectes essencials per a l'estudi de diversos problemes des de la difusió ... -
Transfer of energy in the nonlinear Schrödinger equationon
(Universitat Politècnica de Catalunya, 2011-06)
Projecte Final de Màster Oficial
Accés obertThis work aims to use tools of Dynamical Systems to prove that the nonlinear Schr odinger equation presents a global instability. To do that, we rst reduce this PDE to a system of ODE's of dimension N which we call the ...
