Attractor
Mostrando 1-12 de 61 artigos, teses e dissertações.
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1. Excavation of attractor modules for nasopharyngeal carcinoma via integrating systemic module inference with attract method
The molecular mechanism of nasopharyngeal carcinoma (NPC) is poorly understood and effective therapeutic approaches are needed. This research aimed to excavate the attractor modules involved in the progression of NPC and provide further understanding of the underlying mechanism of NPC. Based on the gene expression data of NPC, two specific protein-protein in
Braz J Med Biol Res. Publicado em: 10/07/2017
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2. Construction of Lyapunov functions for the estimation of basins of attraction
Technical systems are often modeled through systems of differential equations in which the parameters and initial conditions are subject to uncertainties. Usually, special solutions of the differential equations like equilibrium positions and periodic orbits are of importance and frequently the corresponding equations are only set up with the intent to descr
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012
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3. Estudo da estrutura eletrônica de compostos mesoiônicos
Mesoionic compounds are a class of molecules which have attracted the interest of scientific community since the late nineteenth century. Their unique structure has proved to be a challenge for researchers who intended to satisfactorily describe and define it. Those compounds are five-membered heterocyclic rings which possess a delocalized structure
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/09/2011
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4. Absolutely continuous invariant mesures for a class of affine interval exchange maps
We consider a class A of affine interval exchange maps of the interval and we analyse several ergodic properties of the elements of this class, among them the existence of absolutely continuous invariant probability measures. The maps of this class are parametrised by two values a and b , where a , b є (0, 1) . There is a renormalization map T defined from
Publicado em: 2011
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5. Uma condição de injetividade e a estabilidade assintótica global no plano / A injectividade condition and the global asymptotic estability on the plane
Neste trabalho, estamos interessados em estudar a solução do seguinte problema: Seja Y = ( f ,g) um campo de vetores, de classe C1, em R2. Suponha que (x, y) = (0,0) é um ponto singular de Y e suponha que, para todo q ∈ R2, os autovalores de DY tem parte real negativa, isto é, det(DY) >0 e tr(DY) <0. Então, a solução (x, y) = (0,0) de Y é globa
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/03/2010
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6. Atratores para uma classe de equações de vigas extensíveis fracamente dissipativas / Attractors for a class of equations of extensible beams weakly dissipative
This work contains some results on the existence, uniqueness and asymptotic behavior of solutions for a nonlinear beam equation of Kirchhoff type, u IND. tt+ DELTA POT. 2u+ M(INT. IND.|u| 2 dx) u + g(u IND. t) + f (u) = h; where R POT. Nis a bounded domain with smooth boundary . This equation is a model for small vibrations of extensible beams. The nonlocal
Publicado em: 2010
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7. Uma condição de injetividade e a estabilidade assintótica global no plano / A injectividade condition and the global asymptotic estability on the plane
In this work we are interested in the solution of the following problem: Let Y = ( f ,g) be a vector field of class C1 in R2. Suppose that (x, y) = (0,0) is a singular point of Y and assume that for any q ∈ R2, the eigenvalues of DY have negative real part, this is, det(DY) >0 and tr(DY) <0. Then, the solution (x, y) = (0,0) of Y is globally asymptotic
Publicado em: 2010
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8. A 3-D four-wing attractor and its analysis
In this paper, several three dimensional (3-D) four-wing smooth quadratic autonomous chaotic systems are analyzed. It is shown that these systems have a number of similar features. A new 3-D continuous autonomous system is proposed based on these features. The new system can generate a four-wing chaotic attractor with less terms in the system equations. Seve
Brazilian Journal of Physics. Publicado em: 2009-09
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9. Dynamics towards the Feigenbaum attractor
As an essential component in the demonstration of an atypical, q-deformed, statistical mechanical structure in the dynamics of the Feigenbaum attractor we expose, at a previously unknown level of detail, the features of the dynamics of trajectories that either evolve towards the Feigenbaum attractor or are captured by its matching repellor. Amongst these fea
Brazilian Journal of Physics. Publicado em: 2009-08
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10. ERP systems implementation in complex organizations
ERP (Enterprise Resource Planning) systems implementation is a great organizational change, which many times does not reach the desired results. This paper proposes to help understand this implementation, considering that the knowledge of change and evolution processes in organizations may lead to other aspects to be considered, assisting in the identificati
JISTEM - Journal of Information Systems and Technology Management. Publicado em: 2009
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11. Investigando o desempenho de redes neurais de Hopfield modificadas
Investiga-se a dinâmica da rede neural de tempo discreto proposta por Hopfield considerando duas modificações: uma que representa o efeito do mal de Alzheimer na topologia da rede e outra levando em conta que há uma segunda camada de neurônios. O mal de Alzheimer é modelado retirando-se neurônios e distribuindo-se os pesos das sinapses correspondentes
Publicado em: 2009
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12. O jogo de futebol : investigação de sua estrutura, de seus modelos e da inteligencia de jogo, do ponto de vista da complexidade / The soccer game ; : searche of this structure, its models and intelligence of the game from the point of view of complexity
In high-level sports, small things make difference between the first and second positions. The game, and in this is case the soccer game, is a complex phenomenon where the player s performance is transdimensional. At every time players and teams meet problem-situations, in unpredictable circumstances that need fast technical, tactical, physical and psycholog
Publicado em: 2009