Message Processing
Mostrando 13-24 de 86 artigos, teses e dissertações.
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13. Qualidade de serviço de detectores de defeitos na presença de rajadas de perdas de mensagens / Quality of service of failure detectors in the presence of message loss bursts
A Qualidade de Serviço (QoS) de detectores de defeitos determina a rapidez que um detector de defeitos q detecta a quebra de um processo p, e a precisão que q informa essa quebra. Em redes de longa distância e em redes sem fio, a ocorrência de quebras de processo, altas variações de atraso e perdas de pacotes em rajadas são comuns. Nestas condições,
Publicado em: 2006
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14. Objetos Inteligentes Baseados em CLP para Aplicações Científicas
Constraint logic programming (CLP) is a programming language class based on logic programming together with constraint programming. It is derived from general research areas such as artificial intelligence, programming languages, and combinatorial optimization, and has been employed to model and solve many complex real problems. The objective of this work is
Publicado em: 2005
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15. Estudos de algumas ferramentas de coleta e visualização de dados e desempenho de aplicações paralelas no ambiente MPI
Os últimos anos têm apresentado um aumento na aceitação e adoção do processamento paralelo, tanto para computação científica de alto desempenho como para aplicações de propósito geral. Essa aceitação tem sido favorecida principalmente pelo desenvolvimento dos ambientes com processamento maciçamente paralelo (MPP - Massively Parallel Processing
Publicado em: 2003
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16. Treatment of geophysical data as a non-stationary process
The Kalman-Bucy method is here analized and applied to the solution of a specific filtering problem to increase the signal message/noise ratio. The method is a time domain treatment of a geophysical process classified as stochastic non-stationary. The derivation of the estimator is based on the relationship between the Kalman-Bucy and Wiener approaches for l
Computational & Applied Mathematics. Publicado em: 2003
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17. Parallelization of a program that calculates physical properties of magnetic impurities in metals. / Paralelização de um programa para cálculo de propriedades físicas de impurezas magnéticas em metais.
Este trabalho se dedica à paralelização de um programa para cálculos de propriedades físicas de ligas magnéticas diluídas. O método do grupo de renormalização aplicado ao modelo de Anderson de duas impurezas se mostrou particularmente adequado ao processamento paralelo visto que grande parte dos cálculos pode ser executada simultaneamente, assim c
Publicado em: 2001
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18. Paralelização de um classificador contextual de imagens / Parallelimplementationofcontextualclassiferforremotesensingimages
This work presents basic concepts about digital image processing, with emphasis on classification of images from multi-spectral sensors. We have chosen two classification algorithms (MAXVER and ICM), to exemplify the application of the proposed methodologies. Before showing these methodologies, we evaluated the situation of present algorithms, in the SPRING
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/06/2000
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19. Paralelização de um classificador contextual de imagens / Parallelimplementationofcontextualclassiferforremotesensingimages
This work presents basic concepts about digital image processing, with emphasis on classification of images from multi-spectral sensors. We have chosen two classification algorithms (MAXVER and ICM), to exemplify the application of the proposed methodologies. Before showing these methodologies, we evaluated the situation of present algorithms, in the SPRING
Publicado em: 2000
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20. ConstruÃÃo de um nariz artificial usando redes neurais
The animals interact with environment in several ways. The smell around them has an extremely importance in the information transport, essential for survival. Such as for the animals, the smell plays an important rule for human beings. Due to this importance, the study in the human olfactory system is very helpful and started very long time ago. Although it
Publicado em: 2000
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21. Evaluation of automatic parallelization methods. / Avaliação de métodos de paralelização automática.
This work invoke some concepts and definitions about parallel processing, applicable in the automatic parallelization, and also the analysis and conditions for the data dependence, in order to apply the methods for parallelization: Hyperplane, Unimodular Transformation, Communication-Free Data Allocation and Partitioning &Labeling. On this way, transform a s
Publicado em: 1997
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22. Algoritmos heuristicos para o prize collecting traveling salesman problem
This dissertation deals with the Prize Collecting Traveling Salesman Problem (PCTSP). This problem is a generalization of the well-known Traveling Salesman Problem (TSP), where the salesman does not need to visit all the cities, but has to visit enough cities in order to obtain a minimum prize. Besides that, the objective function is given by the minimizatio
Publicado em: 1997
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23. ELEMENTO DE CHAVEAMENTO PARA REDES DE INTERCONEXÃO MULTI-ESTÁGIO DE MÁQUINAS MULTIMICROPROCESSADAS / INTERCONNECTION ELEMENT FOR A PARALLEL PROCESSING SYSTEM
This work proposes a new structure of interconnection network for the MULTIPLUS, a parallel processing system under development at NCE/UFRJ. The network is fault tolerant, and works with 4 inputs and 4 outputs switches. Initially, some interconnection forms of parallel machines are discussed. Some parallel systems architecture are briefly described with emph
Publicado em: 1994
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24. Proposta e implementação de um sistema de processamento paralelo para dinâmica molecular. / Proposal and implementation of a parallel processing system for molecular dynamics.
A method for parallelization of molecular dynamics simulations in distributed memory machines operating under the message-passing paradigm is proposed. Even though the analysis and implementation presented in this work were primarily restricted to the system model known as microcanonical emsemble of Lennard--Jones particles. the obtained system can easily be
Publicado em: 1993