Exploració per altres contribucions "Universitat Politècnica de Catalunya. MMAC - Models Matemàtics aplicats a les ciencies humanes i de la natura"
Ara es mostren els items 1-17 de 17
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A new approach to the vakonomic mechanics
(2014-11-01)
Article
Accés restringit per política de l'editorialThe aim of this paper was to show that the Lagrange-d'Alembert and its equivalent the Gauss and Appel principle are not the only way to deduce the equations of motion of the nonholonomic systems. Instead of them we consider ... -
A technique to composite a modified Newton's method for solving nonlinear equations
(2011-05-02)
Report de recerca
Accés obertA zero-finding technique for solving nonlinear equations more efficiently than they usually are with traditional iterative methods in which the order of convergence is improved is presented. The key idea in deriving this ... -
An improvement of Ostrowski root-finding method
(2006-02)
Article
Accés restringit per política de l'editorialAn improvement to the iterative method based on the Ostrowski one to compute nonlinear equation solutions, which increases the local order of convergence is suggested. The adaptation of a strategy presented here gives a ... -
Cartesian approach for constrained mechanical system with three degree of freedom
(2010)
Article
Accés obertIn the history of mechanics, there have been two points of view for studying mechanical systems: The Newtonian and the Cartesian. According the Descartes point of view, the motion of mechanical systems is described by the ... -
Dynamical behavior of asteroids near resonance: the 4:1 gap and the 7:2 group
(1999-08)
Article
Accés restringit per política de l'editorialA comparative study of the evolution of the Sun–Jupiter–Asteroid system near the 4:1 and 7:2 resonances is performed by means of two techniques that proceed differently from the Hamiltonian corresponding to the planar ... -
Emotional inertia: a key to understanding psychotherapy process and outcome
(2014-09-01)
Article
Accés restringit per política de l'editorialThe processes underlying psychotherapeutic change have increasingly been emphasized in both research and clinical practice. Nonlinear dynamical systems theory (NDS) offers a transdisciplinary scientific approach to the ... -
Estudi de la transformació de l'espai de color RGB a l'espai de color HSV
(2008-09-26)
Report de recerca
Accés obertS’apliquen les tècniques clàssiques de propagació de l’error a la transformació de l’espai de color RGB en l’espai de color HSV a un conjunt de 1098 imatges test. El conjunt d’imatges test són 183 paletes de color i sis ... -
Linear and nonlinear analyses of EEG dynamics during non-painful somatosensory processing in chronic pain patients
(2010-08)
Article
Accés restringit per política de l'editorialThe aim of our study was to characterize brain dynamics of affective modulation of somatosensory processing in chronic pain. We hypothesized that chronic pain patients will show abnormal EEG activity under negative mood ... -
Moment tensor inversion for the 5 july 1930 Montilla earthquake (southern Spain)
(2010-09)
Article
Accés restringit per política de l'editorial -
On computational order of convergence of some multi-precision solvers of nonlinear systems of equations
(2011-05-02)
Report de recerca
Accés obertIn this paper the local order of convergence used in iterative methods to solve nonlinear systems of equations is revisited, where shorter alternative analytic proofs of the order based on developments of multilineal ... -
On the 16th Hilbert problem for algebraic limit cycles
(2010-03-15)
Article
Accés restringit per política de l'editorialFor a polynomial planar vector field of degree n ≥ 2 with generic invariant algebraic curves we show that the maximum number of algebraic limit cycles is 1 + (n − 1)(n − 2)/2 when n is even, and (n − 1)(n − 2)/2 when n is ... -
On the 16th Hilbert problem for limit cycles on nonsingular algebraic curves
(2011-01-15)
Article
Accés restringit per política de l'editorialWe give an upper bound for the maximum number N of algebraic limit cycles that a planar polynomial vector field of degree n can exhibit if the vector field has exactly k nonsingular irreducible invariant algebraic curves. ... -
On the dinamics of nonholonomic systems
(2007)
Article
Accés restringit per política de l'editorialIn the development of nonholonomic mechanics one can observe recurring confusion over the very equations of motion as well as the deeper questions associated with the geometry and analysis of these equations. First of ... -
On the stability of the Earth's fluctuations spectral peaks at their lowest amplitude level
(2008)
Article
Accés restringit per política de l'editorial -
Origin and modelling of cold dark matter halo properties: IV. Triaxial ellipticity
(2011-04-15)
Report de recerca
Accés obertIn the three preceding papers in the series, we presented a model dealing with the global and small-scale structure and kinematics of hierarchically assembled, virialised, collisionless systems, which correctly accounted ... -
Theoretical dark matter halo kinematics and triaxial shape
(2012-08-21)
Article
Accés obertIn a recent paper, Salvador-Solé et al. have derived the typical inner structure of dark matter haloes from that of peaks in the initial random Gaussian density field, determined by the power spectrum of density perturbations ... -
Uso de sismogramas antiguos para el estudio de paràmetros focales de terremotos ibèricos.
(2009)
Comunicació de congrés
Accés obert
