Polygons
Mostrando 13-24 de 51 artigos, teses e dissertações.
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13. Mapeamento de unidades experimentais com GPS: caso de estudo da Embrapa Cerrados.
ABSTRACT: The major objective of this work was to map the research units and the infrastructure available in the Embrapa Cerrados experimental farm in Planaltina, Federal District. More than 190 identities were observed and mapped through the use of GPS portable receiver with an accuracy of about five meters. The UTM coordinates obtained by the GPS were stor
Planaltina. Publicado em: 2011
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14. O ensino de geometria plana pela resolução de problemas do tipo quebra-cabeças com palitos de fósforo
O presente trabalho de investigação compreende o resultado de um processo que teve início como uma reflexão pessoal acerca de um tipo específico de atividade didática que desenvolvemos em sala de aula, permitindo-nos ampliar nossa compreensão sobre o tema em tela e colaborar com elementos que podem ser explorados em processos de formação inicial e c
Publicado em: 2011
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15. Construção de superfícies utilizando o Teorema de Poincaré / Construction of surfaces using the Poincares Theorem.
Este estudo aborda a construção de superfícies compactas pelo quociente M2/G onde a superfície M2 ou é o plano euclidiano, ou é o plano esférico, ou é o plano hiperbólico, G é um grupo de isometrias das respectivas superfícies e esse grupo é gerado pelos emparelhamentos de arestas dos polígonos. O Teorema de Poincaré fornece um método de encon
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/02/2010
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16. Using sentinels to detect intersections of convex and nonconvex polygons
We describe finite sets of points, called sentinels, which allow us to decide if isometric copies of polygons, convex or not, intersect. As an example of the applicability of the concept of sentinel, we explain how they can be used to formulate an algorithm based on the optimization of differentiable models to pack polygons in convex sets. Mathematical subje
Computational & Applied Mathematics. Publicado em: 2010-06
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17. Algoritmos para problemas de corte e empacotamento / Algorithms for cutting and packing problems
Several versions of Cutting and Packing problems are considered NP-hard and, if we consider that P ¿ NP, we do not have any exact polynomial algorithm for solve them. Practical applications arises for such problems and include: resources allocation for computers; cut of steel, wood, glass, aluminum, etc.; packing of objects; and, loading objects into contai
Publicado em: 2010
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18. Integração de dados ambientais e da avaliação ecológica rápida para o zoneamento da reserva natural Serra do Tombador (Goiás) e diagnóstico do seu entorno
The Private Reserves of the Natural Heritage (Reservas Particulares do Patrimônio Natural) (RPPN) belongs to the Brazilian System of Conservation Units, and they have a cornerstone role for nature conservation given that they allows private land owners, on their own initiative, to contribute in the establishment of new protected areas on their lands. The RP
Publicado em: 2009
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19. Estimation of retangular objects in high resolution images using template matching / Estimação de objetos retangulares em imagens de alta resolução utilizando casamento de modelos
The study of urban environment arouses great interest on remote sensing, given the social and economic implications of such application. Technological advances have increased the images generation with great capacity to discriminate Earth surface targets, which have been used to gather information about these areas. Every scene comprehension system has a set
Publicado em: 2009
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20. COMPARAÇÃO DE PROCEDIMENTOS PARA A INTEGRAÇÃO DE LEVANTAMENTOS TOPOGRÁFICOS E LEVANTAMENTOS COM GPS / COMPARISON OF PROCEDURES FOR THE INTEGRATION OF TOPOGRAPHICAL SURVEYS AND GPS SURVEYS
The georeferencing consists of the description of the rural property, characteristics and confrontations, of descriptive memorial containing the border coordinates, georeferenced to the Brazilian Geodetic System following the positioning precision defined by INCRA. The perimeter survey of a rural property can be done only using GPS receivers, or only with to
Publicado em: 2009
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21. Rotational placement of irregular polygons over containers with fixed dimensions using simulated annealing and no-fit polygons
This work deals with the problem of minimizing the waste of space that occurs on a rotational placement of a set of irregular bi-dimensional small items inside a bi-dimensional large object. This problem is approached with an heuristic based on simulated annealing. Traditional " external penalization" techniques are avoided through the application of the no-
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2008-09
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22. Areas and contours / Areas e Contornos
We describe here methods for the area estimation of plane regions bounded by simple curves and also some properties of plane transformations which preserve area. In Chapter 1 the area of polygons, described as a sum of determinants, is used to discuss the calculus of the area of plane regions bounded by simple curves approached by polygons adjusted through g
Publicado em: 2008
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23. AcurÃcia e precisÃo do mapeamento da flora nativa e dos reflorestamento em Minas Gerais / Accuracy and precision of the thematic mapping of native flora and reforestation of Minas Gerais
This study aimed to evaluate the overall accuracy and precision of thematic maps. Specifically aimed to evaluate the accuracy and precision of the classification of Thematic Mapping of Native Flora and Forestry of Minas Gerais. Data were collected from the field around the reference state, using simple random sampling procedure in proportion with the support
Publicado em: 2008
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24. Geoprocessamento como ferramenta de análise integrada de riscos de acidentes industriais / Using of geoprocessing techniques for integrated analysis of risks of the major technological accidents
The use of the geoprocessing techniques in public health allows the identification of spatial variable that disclose social, economic and environmental structure in risksareas. The aim was to develop a methodology for integration of risks of industrial accidents in the Industrial District of Paulínia by using geoprocessing techniques. Accidental hypotheses
Publicado em: 2008