Function Approximation
Mostrando 25-36 de 213 artigos, teses e dissertações.
-
25. Evolving granular systems = : Sistemas granulares evolutivos / Sistemas granulares evolutivos
In recent years there has been increasing interest in computational modeling approaches to deal with real-world data streams. Methods and algorithms have been proposed to uncover meaningful knowledge from very large (often unbounded) data sets in principle with no apparent value. This thesis introduces a framework for evolving granular modeling of uncertain
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/07/2012
-
26. Codificação de vídeo baseada em fractais e representações esparsas / Video coding based on fractals and sparse representations
A video is a sequence of still images representing scenes in motion. A video is a sequence of extremely similar images separated by abrupt changes in their content. If these images were transmitted and stored without any kind of preprocessing, this would require a massive amount of storage space and communication channels with very high bandwidths. Lossy com
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/03/2012
-
27. Aeroelastic stability analysis using linear matrix inequalities
The present work describes an alternative methodology for identification of aeroelastic stability in a range of varying parameters. Analysis is performed in time domain based on Lyapunov stability and solved by convex optimization algorithms. The theory is outlined and simulations are carried out on a benchmark system to illustrate the method. The classical
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012
-
28. Planejamento de trajetórias robóticas utilizando B-splines / Robotics trajectory planning using B-spline
Robot trajectory planning is the specification of the path the terminal element of the robot should move to accomplish a certain task. The trajectory planning can be done in the task domain or in the joints domain. For any domains that the trajectories are planned, it should be defined by a curve fitting function, such as approximation or interpolation of th
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/12/2011
-
29. Análise das variáveis de entrada de uma rede neural usando teste de correlação e análise de correlação canônica / Analysis of input variables of an artificial neural network using bivariate correlation and canonical correlation
The monitoring of variables and diagnosis of sensor fault in nuclear power plants or processes industries is very important because an early diagnosis allows the correction of the fault and, like this, do not cause the production interruption, improving operators security and its not provoking economics losses. The objective of this work is, in the whole of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/09/2011
-
30. Estudo do comportamento elétrico de lâmpadas fluorescentes / Study of the electric behavior of fluorescent lamps
This work presents a broad study of the electrical behavior of compact fluorescent lamps. It includes an analysis of the lamp components and the circuit of the reactor; an analysis of the stability on the operating point of the lamp; a study of static and dynamic characteristics; a development of a mathematical model; simulations and experiments. It is also
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/06/2011
-
31. ArgumentaÃÃo/polifonia nas anÃforas encapsuladoras. / Argumentation/Polyphony within anaphoric encapsulation
The Thesis describes argumentation within encapsulated anaphors based on Semantic Blocks Theory (SBT) (CAREL, 1995; DUCROT &CAREL, 1998) and Polyphony (ANSCOMBRE e DUCROT, 1998; DUCROT e CAREL, 2008) approaches. The study assumes the hypothesis that SBT is an appropriate model to describe argumentative functions of encapsulated anaphors, since it approaches
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/05/2011
-
32. REMARKS ABOUT THE INVARIAN SUBSPACE PROBLEM / CONSIDERAÇÕES SOBRE O PROBLEMA DO SUBESPAÇO INVARIANTE
The Invariant Subspace Problem is the most important open question in Operator Theory. Although, there are many partial results, the question remains open for operators on complex, infinite-dimensional, separable Hilbert spaces. To prove that every operator has a non-trivial invariant subspace might be the beginning of a general structure theory for Hilbert
Publicado em: 2011
-
33. Aprendizado por reforço utilizando tile coding em cenários multiagente / Reinforcement learning using tile coding in multiagent scenarios
Atualmente pesquisadores de inteligência artificial buscam métodos para solucionar problemas de aprendizado por reforço que estão associados a uma grande quantidade de recursos computacionais. Em cenários multiagentes onde os espaços de estados e ações possuem alta dimensionalidade, as abordagens tradicionais de aprendizado por reforço são inadequa
Publicado em: 2011
-
34. A connectionist approach for incremental function approximation and on-line tasks / Uma abordagem conexionista para a aproximação incremental de funções e tarefas de tempo real
Este trabalho propõe uma nova abordagem conexionista, chamada de IGMN (do inglês Incremental Gaussian Mixture Network), para aproximação incremental de funções e tarefas de tempo real. Ela é inspirada em recentes teorias do cérebro, especialmente o MPF (do inglês Memory-Prediction Framework) e a Inteligência Artificial Construtivista, que fazem com
Publicado em: 2011
-
35. Vibroacustografia na avaliação tridimensional de artroplastia total de quadril / Vibro-acoustography in the tridimensional evaluation of total hip arthroplasty
Vibro-acoustography (VA) is a high lateral resolution (<0.7 mm), speckle-free, non- ionizing and non-invasive image based on the nonlinear combination phenomenon of ultrasound waves (MHz) that generates a narrow focus region of low frequency (kHz). In this work, we propose a VA-based tridimensional evaluation of the exposed area of implants, after total hip
Publicado em: 2011
-
36. A formação do gosto musical na crítica jornalística de Herbert Caro no Correio do Povo (1968-1980) : da torre de marfim ao rés do chão
This dissertation intends to analyze how the critic Hebert Caro (1906-1991) entices the liking of classical music, considering that journalism has the mediation function of approximating readers to specialized fields and that the criticism is a fertile expression in this sense. German Jew rooted in Brazil in 1935, Caro was an active figure in Porto Alegre¿s
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011