Este documento relata a defesa de tese de doutorado de Elza Marisa Paiva de Figueiredo na PUC Minas em março de 2010. Sua tese intitulada "Metodologia de Desenvolvimento de Sistemas de Visão em Robôs para Reconhecimento de Objetos" foi aprovada com louvor pela banca examinadora composta por seis professores sob a orientação do professor Denílson Laudares Rodrigues.
Este documento relata a defesa de tese de doutorado de Elza Marisa Paiva de Figueiredo na PUC Minas em março de 2010. Sua tese intitulada "Metodologia de Desenvolvimento de Sistemas de Visão em Robôs para Reconhecimento de Objetos" foi aprovada com louvor pela banca examinadora composta por seis professores sob a orientação do professor Denílson Laudares Rodrigues.
1) The document provides an overview of the Danfoss PLUS+1 Hitch Control System, which uses proportional valves, sensors, and microcontrollers to automate hitch positioning for tractors.
2) The system allows for closed-loop control of hitch position in work and transport modes. It combines position, force, and slip control for optimal field operation.
3) The system hardware includes valves, sensors, and microcontrollers. Software control is provided by an application block that can be customized using Danfoss GUIDE software.
This paper analyzes the impact of steel spheres on aluminum panels through numerical modeling and experimentation. The modeling aims to accurately represent impact test results from literature in order to evaluate factors like ballistic velocity and maximum deformation. The numerical simulations matched experimental data reasonably well given material properties. Mesh element size was found to critically impact ballistic velocity determination. Modifying the conventional dynamic characterization method showed promise for reducing friction effects.
Este documento apresenta um método de segmentação de imagens baseado em contornos ativos do tipo balão e algoritmos genéticos. O método usa contornos ativos guiados por forças internas e externas para segmentar objetos em imagens. Algoritmos genéticos são aplicados para fornecer uma solução robusta aos problemas de mínimos locais enfrentados pelos contornos ativos. Resultados experimentais confirmam o potencial da abordagem proposta para segmentação de imagens.
This paper proposes an approach for automatic feature extraction and shape characterization to recognize and diagnose protozoan parasites in images. A morphological feature detector is used along with quantitative representations. Shape descriptors like curvature, size, and symmetry are extracted, along with texture quantifications. A fuzzy logic approach is used for species discrimination and recognition. The methodology is based on solving Poisson's equation and using the lengths of streamlines along equipotential surfaces to characterize object shapes. A database was created with training samples to build feature vectors for classification. A diagnostic tool allows remote identification of parasite species in images.
This document provides an overview of refrigeration systems and their main components. It discusses how refrigeration works by removing heat from spaces or objects using a mechanical process. The key parts of a refrigeration system are described as the compressor, condenser, expansion valve, and evaporator. The compressor increases the pressure and temperature of the refrigerant vapor. The condenser cools and condenses the refrigerant into a liquid. The expansion valve controls the flow of liquid refrigerant into the evaporator. In the evaporator, the refrigerant absorbs heat from its surroundings as it vaporizes, thus cooling the environment.
1) The document provides an overview of the Danfoss PLUS+1 Hitch Control System, which uses proportional valves, sensors, and microcontrollers to automate hitch positioning for tractors.
2) The system allows for closed-loop control of hitch position in work and transport modes. It combines position, force, and slip control for optimal field operation.
3) The system hardware includes valves, sensors, and microcontrollers. Software control is provided by an application block that can be customized using Danfoss GUIDE software.
This paper analyzes the impact of steel spheres on aluminum panels through numerical modeling and experimentation. The modeling aims to accurately represent impact test results from literature in order to evaluate factors like ballistic velocity and maximum deformation. The numerical simulations matched experimental data reasonably well given material properties. Mesh element size was found to critically impact ballistic velocity determination. Modifying the conventional dynamic characterization method showed promise for reducing friction effects.
Este documento apresenta um método de segmentação de imagens baseado em contornos ativos do tipo balão e algoritmos genéticos. O método usa contornos ativos guiados por forças internas e externas para segmentar objetos em imagens. Algoritmos genéticos são aplicados para fornecer uma solução robusta aos problemas de mínimos locais enfrentados pelos contornos ativos. Resultados experimentais confirmam o potencial da abordagem proposta para segmentação de imagens.
This paper proposes an approach for automatic feature extraction and shape characterization to recognize and diagnose protozoan parasites in images. A morphological feature detector is used along with quantitative representations. Shape descriptors like curvature, size, and symmetry are extracted, along with texture quantifications. A fuzzy logic approach is used for species discrimination and recognition. The methodology is based on solving Poisson's equation and using the lengths of streamlines along equipotential surfaces to characterize object shapes. A database was created with training samples to build feature vectors for classification. A diagnostic tool allows remote identification of parasite species in images.
This document provides an overview of refrigeration systems and their main components. It discusses how refrigeration works by removing heat from spaces or objects using a mechanical process. The key parts of a refrigeration system are described as the compressor, condenser, expansion valve, and evaporator. The compressor increases the pressure and temperature of the refrigerant vapor. The condenser cools and condenses the refrigerant into a liquid. The expansion valve controls the flow of liquid refrigerant into the evaporator. In the evaporator, the refrigerant absorbs heat from its surroundings as it vaporizes, thus cooling the environment.