Bifurcations Theory
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. BIFURCATIONS ON THE ROAD: CONFLICTING INTENTIONS AND DEMONSTRATIVE REFERENCE
Abstract This is a critical notice of Mario Gómez-Torrente's novel account of demonstrative reference presented in chapter 2 of the recently published book Roads to Reference. After presenting the main tenets of his view (including the existence of a multitude of cases where demonstrative reference is indeterminate), I go on to critically examine a couple o
Manuscrito. Publicado em: 2020-12
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2. A forma sonata em descontinuidades e bifurcações / Sonata Form in Discontinuities and Bifurcations.
Este trabalho propõe um novo modelo de análise musical, em complementação à análise harmônica tradicional, com o estabelecimento de dois atratores - a partir da dilatação da estabilidade harmônica a partir do séc. XVIII e da resolução da dicotomia temática, condições fundamentais para a existência do modelo Sonata - definidos como catástrof
Publicado em: 2010
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3. Bifurcações de campos vetoriais descontínuos / Bifurcations of discontinuous vector fields
Let M be a connected and compact set of the plane which is the union of the connected subsets N and S. Let Z_L=(X_L,Y_L) be a one-parameter family of discontinuous vector fields, where X_L is defined on N and Y_L on S. The two fields X_L, Y_L and their dependences on L are smooths, i. e., are of C^\infty class; the discontinuity happens in the common boundar
Publicado em: 2009
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4. Bifurcações em PLLs de terceira ordem em redes OWMS. / Bifurcations on 3rd order PLLs in OWMS networks.
Este trabalho apresenta um estudo qualitativo das equações diferenciais nãolineares que descrevem o sincronismo de fase nos PLLs de 3ª ordem que compõem redes OWMS de topologia mista, Estrela Simples e Cadeia Simples. O objetivo é determinar, através da Teoria de Bifurcações, os valores ou relações entre os parâmetros constitutivos da rede que pe
Publicado em: 2008
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5. Sobre caos homoclinico : aplicações a ciencia da engenharia e mecanica / Homoclinic chaos : applications to the science of engineering and mechanics
Este trabalho tem como objetivo a determinação analítica da ocorrência de um tipo de caos (irregularidade) determinístico denominado Caos Homoclínico em algumas aplicações da Ciência da Engenharia como, por exemplo, a Robótica e a Teoria de Controle (Controle de Bifurcações e Caótico). Para isto, faz-se uso da chamada Teoria de Poincaré - Mel?n
Publicado em: 2005
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6. A new approach to evaluate imperfection sensitivity in asymmetric bifurcation buckling analysis
A direct procedure for the evaluation of imperfection sensitivity in bifurcation problems is presented. The problems arise in the context of the general theory of elastic stability for discrete structural systems, in which the energy criterion of stability of structures and the total potential energy formulation are employed. In cases of bifurcation buckling
Journal of the Brazilian Society of Mechanical Sciences. Publicado em: 2001
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7. Sistemas impulsivos com retardamento: soluções periódicas. / Periodic solutions of an impulsive differential system with delay: an Lp approach.
We prove the existence of periodic solutions of some retarded functional differential equations subjected to impulsive self-supporting conditions. Due to the impulses, solutions exhibit discontinuites of the first kind and this forces the consideration of more general phase spaces than C([-r,0],Rn). We show that periodic solutions can emanate from the origin
Publicado em: 2000
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8. Modelagem hidrodinamica de um mecanismo pulso duplicador
Pulse duplicators simulators are useful devices in biomedical applications. They can simulate in vitro flow phenomena related to arterial blood flow such as: stenosis, aneurysms, bifurcations, vessel elasticity among others. The purpose of this work is two-fold: develop mathematicaltools to model and analyze pulse duplicators simulators and the propose a new
Publicado em: 1994
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9. Predicting chaos for infinite dimensional dynamical systems: the Kuramoto-Sivashinsky equation, a case study.
The results of extensive computations are presented to accurately characterize transitions to chaos for the Kuramoto-Sivashinsky equation. In particular we follow the oscillatory dynamics in a window that supports a complete sequence of period doubling bifurcations preceding chaos. As many as 13 period doublings are followed and used to compute the Feigenbau
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10. Biomimetic ratcheting motion of a soft, slender, sessile gel
Inspired by the locomotion of terrestrial limbless animals, we study the motion of a lubricated rod of a hydrogel on a soft substrate. We show that it is possible to mimic observed biological gaits by vibrating the substrate and by using a variety of mechanisms to break longitudinal and lateral symmetry. Our simple theory and experiments provide a unified vi
National Academy of Sciences.
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11. An effective kinetic representation of fluctuation-driven neuronal networks with application to simple and complex cells in visual cortex
A coarse-grained representation of neuronal network dynamics is developed in terms of kinetic equations, which are derived by a moment closure, directly from the original large-scale integrate-and-fire (I&F) network. This powerful kinetic theory captures the full dynamic range of neuronal networks, from the mean-driven limit (a limit such as the number of ne
National Academy of Sciences.
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12. Spectral bifurcations in dispersive wave turbulence
Dispersive wave turbulence is studied numerically for a class of one-dimensional nonlinear wave equations. Both deterministic and random (white noise in time) forcings are studied. Four distinct stable spectra are observed—the direct and inverse cascades of weak turbulence (WT) theory, thermal equilibrium, and a fourth spectrum (MMT; Majda, McLaughlin, Tab
The National Academy of Sciences.