Programa de Pós-Graduação em Ciência da Computação - PPGCC/ICEN

URI Permanente desta comunidadehttps://repositorio.ufpa.br/handle/2011/2351

O Programa de Pós-Graduação em Ciência da Computação (PPGCC) é um programa do Instituto de Ciências Exatas e Naturais (ICEN) da Universidade Federal do Pará (UFPA). O PPGCC foi fundando em 2005 e visa ampliar a massa crítica na região, objetivando a produção de pesquisa científica na área, na busca de resolução de problemas regionais.

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Agora exibindo 1 - 2 de 2

Acesso aberto (Open Access)
Otimização por multi-enxame evolucionário de partículas clássico e quântico competitivo sob a arquitetura paralela CUDA aplicado em problemas de engenharia
(Universidade Federal do Pará, 2014-05-23) SOUZA, Daniel Leal; OLIVEIRA, Roberto Célio Limão de; http://lattes.cnpq.br/4497607460894318; MONTEIRO, Dionne Cavalcante; http://lattes.cnpq.br/4423219093583221
This paper presents the development of a set of hybrid metaheuristic based on the use of evolutionary strategies in conjunction with classical and quantum multi-swarm optimization with master-slave approach. These algorithms are named Competitive Evolutionary Multi-Swarm Optimization (CEMSO) and Competitive Quantum-Behaviour Evolutionary Multi-Swarm Optimization (CQEMSO). For comparison and validation of the results, four engineering problems encountered in many publications scientific are used: Welded Beam Design (WBD); Minimization of the Weight of a Tension/ Compression Spring (MWTCS); Speed Reducer Design (SRD); Design of a Pressure Vessel (DPV). The algorithms were developed under the CUDA architecture, which provides a massive parallel computing environment that enables a more appropriate data allocation regarding the organization of swarms, as well as contributing to the significant decrease in processing time. With the application of evolutionary strategies in the PSO and QPSO algorithms, as well as the proposed boundary conditions, the solutions described in this document offer several advantages. We can highlight improvements in the ability to search, increasing the convergence rate and high degree of parallelism. These facts are confirmed by the data obtained (i.e. Execution time, best solutions obtained, mean and variance of results) by CQEMSO and CQEMSO algorithms when compared to those obtained from multi-swarm approach for PSO (COMSO), EPSO (COEMSO) and QPSO (COQMSO). All of these algorithms were implemented and subjected to performance analysis through experiments with engineering problems described above.
Acesso aberto (Open Access)
Reposdn: um método de organização e coordenação de aplicações em repositório para redes definidas por software
(Universidade Federal do Pará, 2014-02-28) PINHEIRO, Rômulo Silva; ABELÉM, Antônio Jorge Gomes; http://lattes.cnpq.br/5376253015721742
The adoption of the paradigm of Software Defined Networks - SDN by academic institutions and large companies like Google, Cisco, HP, among others, is already a reality. This paradigm is considered a solution to the new model of Future Internet due to its technical and economic viability. The SDN paradigm enables new perspectives in terms of abstractions, control and development applications, free from the limitations of current technologies environments. However there is still lack in the way the management and control of several existing applications in the Internet occurs. The programmability is key to successful paradigm for Software Defined Networks as it allows the separation of the data with the control plane level. However, in the context of this paradigm, manage input and output controllers for many applications is a relatively unexplored issue, since the SDN applications, routing applications such as, for example, are not organized in a controlled environment. This thesis proposes a method of organization and coordination applications in repository for software defined networks, called RepoSDN, which specifies, models and automates the processes needed for applications reaching the administrator can manage this and their uses in the network, making it simple, safe and agile. The RepoSDN presents a structure where each SDN application is managed within the network to reach out to controllers. Additionally, it contains a central repository, where any user can send their applications to share with management Software Defined Network, which use specific applications for your need. A prototype of RepoSDN, which implements the functionality of the applications repository and components designed to help in the management of applications on a programmable network was developed. The method of organization and coordination of applications repository for SDN helps the administrator to handle each application. The proposal has been validated through the development of the repository of application, which consisted in doing load testing in developed component testing. The objective of the components is becoming simpler method that applications are entered in the various types of controllers of Software Defined Networking, resulting in the proof of feasibility, scalability and exibility of RepoSDN.

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