Adaptive Memory
Mostrando 13-24 de 54 artigos, teses e dissertações.
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13. Sistema de codificação de video baseado em transformadas tridimensionais, rapidas e progressivas / Video coding system based on three dimensional, fast and progressive transforms
The research on video coding systems has always been looking for techniques that can reach the highest possible compression rate. This compression rate increase is generally achieved by means of increased coding complexity, which is supported by the continuous increase verified in computational power. However, in some video coding and transmission situations
Publicado em: 2007
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14. ProposiÃÃo e avaliaÃÃo de algoritmos de filtragem adaptativa baseados na rede de kohonen / Proposition and evaluation of the adaptive filtering algorithms basad on the kohonen
A Rede Auto-OrganizÃvel de Kohonen (Self-Organizing Map - SOM), por empregar um algoritmo de aprendizado nÃo supervisionado, vem sendo tradicionalmente aplicada na Ãrea de processamento de sinais em tarefas de quantizaÃÃo vetorial, enquanto que redes MLP (Multi-layer Perceptron) e RBF (Radial Basis Function) dominam as aplicaÃÃes que exigem a aproxima
Publicado em: 2007
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15. Three-dimensional cutting and packing problems and integration with vehicle routing / Problemas de corte e empacotamento tridimensional e integração com roteamento de veiculos
The wide-scale adoption of the containers made the development of the multimodal transport possible. Nowadays, shipment of boxes in containers is an important activity for companies that have in the load transport a logistic factor of high cost. This work presents the development and the application of metaheuristics with adaptive memory in order to solve th
Publicado em: 2006
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16. Dinâmicas emergentes na família de memórias associativas bidirecionais caóticas e sua habilidade para saltar passos / Emergent dynamics in family of chaotic bidirectional associative memories and its ability to skip steps
In this thesis, a family of bidirectional associative memories (C-BAM family) is proposed, implemented and tested to extend the study of chaotic phenomenon in associative models. In the C-BAM model, all the original neurons of bidirectional associative memory (BAM), BAM with delay and exponenetial BAM (eBAM) were substituted for chaotic neurons. Based on the
Publicado em: 2006
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17. HEURÍSTICAS PARA O PROBLEMA DE SEQÜÊNCIAMENTO DE DNA POR HIBRIDAÇÃO / HEURISTICS FOR THE PROBLEM OF DNA SEQUENCING BY HYBRIDIZATION
O seqüenciamento por hibridação é uma alternativa interessante para a tarefa de seqüenciamento de DNA. Este método ainda está sendo aperfeiçoado e pode superar as técnicas utilizadas em termos de tempo e custo. Uma etapa crucial do método consiste em resolver um problema combinatório que pode ser formulado como um caso especial do problema do caix
Publicado em: 2005
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18. Estudo sobre redes neurais nÃo supervisionadas aplicado a simulaÃÃes de interceptaÃÃo visual de alvos 3D.
Este trabalho refere-se à implementaÃÃo e avaliaÃÃo de desempenho de arquiteturas de redes neurais nÃo supervisionadas, utilizadas como controladores em tarefas de interceptaÃÃo de alvos estacionÃrios no espaÃo 3D. Em termos gerais, o problema de interceptaÃÃo visual consiste no controle de atitude do sistema de visÃo objetivando que o alvo imag
Publicado em: 1999
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19. Metodos iterativos e multigrid adaptaveis em malhas não estruturadas
This work presents direct, iterative and multigrid methods for solving systems of equations obtained by means of the finite element method applied to linear elliptic problems, considering two and three dimensional elastic examples. Adaptive analysis aspects are also discussed by taking an error estimator and some stress recovery procedures. All the algorithm
Publicado em: 1996
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20. POSITIVE REAL SYSTEMS APPLICATION IN THE CONTROL OF UNCERTAIN DYNAMICAL SYSTEMS / SISTEMAS REAIS POSITIVOS E APLICAÇÕES AO CONTROLE COM INCERTEZAS
This thesis addresses strictly positive real systems and their application in the control of uncertain dynamical systems, as for exemplare, in adaptative control with memory and in variable structure systems with sliding motions. The results of this work extend the knowledge about strictly positive real systems and their application in control systems, and o
Publicado em: 1989
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21. Hidden talents of natural killers: NK cells in innate and adaptive immunity
Natural killer (NK) cells are innate immune lymphocytes capable of killing target cells and producing immunoregulatory cytokines. Herein, we discuss recent studies that indicate that NK cells span the conventional boundaries between innate and adaptive immunity. For example, it was recently discovered that NK cells have the capacity for memory-like responses
Nature Publishing Group.
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22. Memory in Viral Quasispecies
Biological adaptive systems share some common features: variation among their constituent elements and continuity of core information. Some of them, such as the immune system, are endowed with memory of past events. In this study we provide direct evidence that evolving viral quasispecies possess a molecular memory in the form of minority components that pop
American Society for Microbiology.
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23. Modeling the stylized facts in finance through simple nonlinear adaptive systems
Recent work on adaptive systems for modeling financial markets is discussed. Financial markets are viewed as evolutionary systems between different, competing trading strategies. Agents are boundedly rational in the sense that they tend to follow strategies that have performed well, according to realized profits or accumulated wealth, in the recent past. Sim
National Academy of Sciences.
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24. The CD8+ memory T-cell state of readiness is actively maintained and reversible
The ability of the adaptive immune system to respond rapidly and robustly upon repeated antigen exposure is known as immunologic memory, and it is thought that acquisition of memory T-cell function is an irreversible differentiation event. In this study, we report that many phenotypic and functional characteristics of antigen-specific CD8 memory T cells are
American Society of Hematology.