Bifurcation Theory
Mostrando 13-24 de 26 artigos, teses e dissertações.
-
13. One-way master-slave synchronization networks: single star, single chain and mixed. / Sincronismo em redes mestre-escravo de via-única: estrela simples, cadeia simples e mista.
Neste trabalho, são estudados os problemas de sincronismo de fase nas redes mestre-escravo de via única (OWMS), nas topologias Estrela Simples, Cadeia Simples e mista, através da Teoria Qualitativa de Equações Diferenciais, com ênfase no Teorema da Variedade Central. Através da Teoria das Bifurcações, analisa-se o comportamento dinâmico das malhas
Publicado em: 2003
-
14. THE CONTRIBUTION AND DEVELOPMENT OF THE ENGLISH SCHOOL OF INTERNATIONAL RELATIONS / A CONTRIBUIÇÃO E O DESENVOLVIMENTO DA ESCOLA INGLESA DE RELAÇÕES INTERNACIONAIS
The aim of this dissertation is to evaluate the contribution and the development of the English School of International Relations. In order to achieve this, the analytical axis will be historic, emphasising a chronological approach. In this sense, it was accessed the contribution of two of its leading theorists: Martin Wight and Hedley Bull, that together es
Publicado em: 2003
-
15. Application of the center manifold theory to the study of slewing flexible Non-ideal structures with nonlinear curvature: a case study
In this paper is Analyzed the local dynamical behavior of a slewing flexible structure considering nonlinear curvature. The dynamics of the original (nonlinear) governing equations of motion are reduced to the center manifold in the neighborhood of an equilibrium solution with the purpose of locally study the stability of the system. In this critical point,
Journal of the Brazilian Society of Mechanical Sciences. Publicado em: 2002-07
-
16. Analise não linear de sistemas dinamicos holonomos não ideais / Nonlinear anaIysis of non ideals holonomic dynamical systems
Several times the mechanical systems join the behavior described by laws of motion to the dynamic of their operation. Their solution pass by adopted simplified hypotheses in order to obtain a representative and helpful mathematical model. When the energy source used in the bringing to the action of the motion has limited power, i.e., there is not sufficient
Publicado em: 2002
-
17. 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
-
18. TEORIA DAS BIFURCAÇÕES EM SISTEMAS ELÉTRICOS DE POTÊNCIA: UMA APLICAÇÃO AO PROBLEMA DE OTIMIZAÇÃO / BIFURCATION THEORY IN ELECTRICAL POWER SYSTEMS: AN APPLICATION TO THE OPTIMIZATION PROBLEM
This work aims at studying bufurcation theory associated to non-linear differential equations systems with application on stability of electrical power systems. As an application of this theory, the problem of optimal operation in power systems is analyzed. New restriction to optimum power flow are found and together with traditional ones, assure the stabili
Publicado em: 1995
-
19. Dissipative Structures, Catastrophes, and Pattern Formation: A Bifurcation Analysis
A model chemical network involving reactions and diffusion is studied. Spatially and temporally ordered solutions of the equations are found by bifurcation theory. These solutions are calculated analytically and their stability is studied. Properties of these dissipative structures are discussed, and a comparison with Thom's theories of morphogenesis is outl
-
20. “Coarse” stability and bifurcation analysis using time-steppers: A reaction-diffusion example
Evolutionary, pattern forming partial differential equations (PDEs) are often derived as limiting descriptions of microscopic, kinetic theory-based models of molecular processes (e.g., reaction and diffusion). The PDE dynamic behavior can be probed through direct simulation (time integration) or, more systematically, through stability/bifurcation calculation
The National Academy of Sciences.
-
21. Four Simultaneously Stable Polymorphic Equilibria in Two-Locus Two-Allele Models
The existence of four simultaneously stable equilibria with both loci polymorphic is shown for the Lewontin-Kojima version of the two-locus two-allele symmetric viability model, using bifurcation theory. This exceeds the previously claimed bound of two stable polymorphisms. Biological implications of the result are discussed.
-
22. Bifurcation Theory and the Type Numbers of Marston Morse
Let H be a real Hilbert space and f(x,λ) be a C2 operator mapping a small neighborhood U of (x0,λ0) ε (H × R1) into itself. We investigate the solutions of the equation f(x,λ) = 0 near a solution (x0,λ0), assuming that f(x,λ) is a gradient mapping and 0 < dim Ker fx(x0,λ0) < ∞. In particular, we show that the type numbers of Marston Morse for an is
-
23. Unexpected Behavior in Two Locus Genetic Systems: An Analysis of Marginal Underdominance at a Stable Equilibrium
The phenomenon of marginal underdominance at a stable equilibrium in a two-locus-two-allele deterministic selection model is studied analytically using bifurcation theory. This technique and additional numerical studies indicate several new aspects of the phenomenon that are of biological importance. Marginal underdominance can occur at both loci simultaneou
-
24. Stability in dynamical astronomy*
Hill's concept of stability is generalized and its relation to bifurcation theory is shown. A quantitative measure of stability is introduced that allows the comparison of the stability of different astronomical systems. Theoretical stability limits for triple stellar systems, for planetary systems, and for satellite systems are established. The measure of s