Fuzzy Inference Systems
Mostrando 13-24 de 33 artigos, teses e dissertações.
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13. Abordagem baseada em lógica fuzzy para alocação de indicadores de faltas em sistemas de distribuição de energia elétrica / Approach based on fuzzy logic for fault indicator allocation in power distribution systems
This work presents a methodology for efficient allocation of fault indicator devices in electric power distribution systems. The behavior of the main variables that influence in the quantification of the potentiality for installation of fault indicator devices were analyzed taking into account the feeder length. In methodology terms, fuzzy inference systems
Publicado em: 2009
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14. Ambiente para desenvolvimento de aplicações fuzzy industriais / Ambiente para desenvolvimento de aplicações fuzzy industriais
This paper describes the design, implementation and enforcement of a system for industrial process control based on fuzzy logic and developed using Java, with support for industrial communication protocol through the OPC (Ole for Process Control). Besides the java framework, the software is completely independent from other platforms. It provides friendly an
Publicado em: 2009
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15. AplicaÃÃo de Sistemas Fuzzy e Neuro-fuzzy para PrediÃÃo da Temperatura Retal de Frangos de Corte / Application of fuzzy and neuro-fuzzy systems for rectal temperature prediction of broiler chickens.
The aims of this research was to develop and validate a decision support system using fuzzy system, on the ground of fuzzy sets theory, and a neuro-fuzzy system (neuro-fuzzy network), based on the algorithm LOLIMOT (Local Linear Model Tree ) for rectal temperature prediction of broiler chickens. The systems were developed based on the ground of three input v
Publicado em: 2009
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16. Fuzzy inference systems approach for long term hydrothermal scheduling / Sistema de inferencia nebulosa ao planejamento da operação hidrotermica de medio prazo
The long term hydrothermal scheduling lies in the optimization of the water resource usage through the maximization of the hydroelectric production and the minimization of the thermal plants operation. Its goal is to assure an economic and reliable load supply throughout the study stages. This problem can be characterized by exhibiting a complex nature, sinc
Publicado em: 2009
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17. Geração genética de classificador fuzzy intervalar do tipo-2
The objective of this work is to study, expand and evaluate the use of interval type-2 fuzzy sets in the knowledge representation for fuzzy inference systems, specifically for fuzzy classifiers, as well as its automatic generation form data sets, by means of genetic algorithms. This work investigates the use of such sets focussing the issue of balance betwee
Publicado em: 2009
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18. PRIORIZAÇÃO DOS MODOS DE FALHA DE EQUIPAMENTOS UTILIZANDO OS MÉTODOS DE ANÁLISE MULTICRITÉRIO PROMETHEE E FUZZY PROMETHEE / PRIORITIZATION OF FAILURE MODES OF EQUIPMENT USING THE METHODS OF MULTICRITERIA ANALYSIS PROMETHE AND FUZZY PROMETHE
Aiming to meet the criteria of availability and reliability required by the rules of the Brazilian electric sector, energy companies have increased the use of systems for monitoring and diagnosis. This allows the identification of prior evidence of abnormalities in the operational condition of substation equipment, enabling the practice of predictive mainten
Publicado em: 2009
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19. ELECTRIC DISTRIBUTION POWER SYSTEMS RELIABILITY OPTIMIZATION: An Approach Considering the Selection and Allocation of Protection and Switching Devices / OTIMIZAÇÃO DA CONFIABILIDADE DE SISTEMAS DE DISTRIBUIÇÃO DE ENERGIA ELÉTRICA: Uma Abordagem Considerando a Seleção e Alocação de Dispositivos de Proteção e Manobras
One of the main goals of the electric utilities is to provide energy to its customers in a reliable and low cost way. Traditionally, the electricity sector regulatory commissions impose continuity targets, which must be carried out, to avoid great penalties. For many years, the electric utilities have adopted the practice of allowing the increment of tempora
Publicado em: 2009
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20. Fuzzy logic and particle swarm optimization for reactive power and voltage control / Logica nebulosa e tecnica de otimização particle swarm aplicados ao controle de tensão e de potencia reativa
Due to the growing electrical power demand and the lag of transmission system infrastruc ture, the operation of transmission systems approaches to its limits and increases the complexity of the system operation. ln this context, in order to satisfy the more rigid operating conditions, managing voltage profile and power flow in a more effective way becomes ve
Publicado em: 2008
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21. MODELOS NEURO-FUZZY HIERÁRQUICOS BSP DO TIPO 2 / TYPE-2 HIERARCHICAL NEURO-FUZZY BSP MODEL
The objective of this thesis is to create a new type-2 fuzzy inference system for the treatment of uncertainties with automatic learning and that provides an interval of confidence for its defuzzified output through the calculation of corresponding type-reduced sets. In order to attain this objective, this new model combines the paradigms of the modelling of
Publicado em: 2007
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22. AplicaÃÃo de sistemas imunolÃgicos artificiais para prediÃÃo da estrutura de proteÃnas / Artificial immune systems aplication for protein structure prediction
This work presents hybrid Immune-based Systems to solve the Protein Folding Problem for the three-dimensional hydrofobic-Polar model (3D HP). The Protein Structure Prediction consists of finding the spacial arrangement of a proteinâs amino acids that has a minimal energy. The proposed methodology is focused on Artificial Immune Systems supported by but uses
Publicado em: 2007
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23. SISCTG- an intelligent systems for classification of cardiotocography signals for help diagnosis doctor / SISCTG - Sistema para AnÃlise Computadorizada da FrequÃncia CardÃaca Fetal
The accurate analysis of the fetal heart rate (FHR) and its correlation with uterine contractions (UC) allows the diagnostic and the anticipation of many problems related to fetal distress and the preservation of his life. This dissertation presents the results of an hibrid system based on a set of deterministic rules and fuzzy inference system developed to
Publicado em: 2007
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24. Desenvolvimento de um sistema para diagnostico preventivo de laminite em bovinos de leite utilizando logica Fuzzy / Development of a system for preventive diagnosis of lameness in dairy cattle using fuzzy logic
From the middle of the 20th century experts on genetics and producers had intensified the work to improve dairy production. Advances have appeared, however these results have not been followed by the improvement of cows legs and hooves. The intensification of herd?s needs have been carried through housing modifications aiming at to adjust them as well as to
Publicado em: 2007