Análise da incerteza na representação de classes de cobertura do solo urbano resultantes da aplicação de uma rede neural artificial

The great diversity of materials that characterizes the urban environment determines a structure of mixed classes in a classification of multiespectral images. In that sense, it is important to define an appropriate classification system using a non parametric classifier, that allows incorporating non spectral (such as texture) data to the process. They also allow analyzing the uncertainty associated to each class from the output alues of the network calculated in relation to each class. Considering these properties, an experiment was carried out. This experiment consisted in the application of an Artificial Neural Network aiming at the classification of the urban land cover of Presidente Prudente and the analysis of the uncertainty in the representation of the mapped thematic classes. The results showed that it is possible to discriminate the variations in the urban land cover through the application of an Artificial Neural Network. It was also possible to visualize the spatial variation of the uncertainty in the attribution of classes of urban land cover from the generated representations. The class characterized by a defined pattern as intermediary related to the impermeability of the urban soil presented larger ambiguity degree and, therefore, larger mixture.

Um estudo sobre o osu do modelo de cor RGB no proceso de correspondência por correlação

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Panorama Social de América Latina 2002-2003

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Espectrofotometria de longo caminho óptico em espectrofotô metro de duplo-feixe convencional: uma alternativa simples para investigações de amostras com densidade óptica muito baixa

We describe the design and tests of a set-up mounted in a conventional double beam spectrophotometer, which allows the determination of optical density of samples confined in a long liquid core waveguide (LCW) capillary. Very long optical path length can be achieved with capillary cell, allowing measurements of samples with very low optical densities. The device uses a custom optical concentrator optically coupled to LCW (TEFLON® AF). Optical density measurements, carried out using a LCW of ̃ 45 cm, were in accordance with the Beer-Lambert Law. Thus, it was possible to analyze quantitatively samples at concentrations 45 fold lower than that regularly used in Spectrophotometric measurements.

Economía y comunidades andinas ecuatorianas: enfoques conceptuales

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Las mujeres chilenas en los noventa: hablan las cifras

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República Popular China: un desafío y una oportunidad para el sector agroalimentario de la República Argentina: herramientas para exportar

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Panorama de la gestión pública

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El aporte de las mujeres a la igualdad en América Latina y el Caribe

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América Latina y el Caribe: proyecciones 2007-2008

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La internacionalización de las empresas brasileñas en Argentina

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Familias latinoamericanas: organización del trabajo no remunerado y de cuidado

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La estrategia chilena de acuerdos comerciales: un análisis político

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Cuero, calzado y afines en Chile: ¿una industria en desaparición o en búsqueda de un nuevo destino?

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Los efectos potenciales del tratado de libre comercio entre Ecuador y Estados Unidos en las mujeres rurales ecuatorianas

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