A Geographical approach to self-organizing maps algorithm applied to image segmentation.
Image segmentation is one of the most challenging steps in image processing. Its results are used by many other tasks regarding information extraction from images. In remote sensing, segmentation generates regions according to found targets in a satellite image, like roofs, streets, trees, vegetatio...
por Portal Padrão
publicado
23/08/2011
2:12 PM
Evaluation of low-cost, tree-mounted temperature loggers for validation of satellite-based flood mapping on the Amazon floodplain.
The spatial extent, duration, and depth of inundation are key factors in the functioning of floodplain ecosystems. Satellite-based methods have been developed for mapping flooding extent and water surface height across large floodplain reaches, but on the Amazon floodplain, ground measurements for r...
por Portal Padrão
publicado
23/08/2011
2:11 PM
The structure of severe storms and associated lightning in the State of São Paulo, Brazil.
The lightning behavior of all known cases of extremely severe storms, most of them supercells, which occurred from 1999 onwards, is discussed and summarized in this paper. In addition, a new aspect, viz. Intra-Cloud (IC) strokes, has also been included since the installation of 2 special sensors in ...
por Portal Padrão
publicado
23/08/2011
2:10 PM
Produtividade da cultura da soja no Rio Grande do Sul com dados EVI/MODIS.
Nowadays, agricultural commodity market requires more efficient and better control of information on crop production. Due to characteristics of Brazil, in this market, the attainment of reliable and timely agricultural estimates is very important. The objective of this study was to evaluate the coup...
por Portal Padrão
publicado
23/08/2011
2:09 PM
Estudos dos efeitos das mudanças globais na bacia do rio madeira.
Cada vez mais, as pesquisas realizadas na Amazônia têm demonstrado a importância dessa região para o equilíbrio do meio ambiente na América do Sul. Nessa linha, este trabalho tem por objetivo o estudo dos efeitos das mudanças globais na bacia do Rio Madeira. Para isso, foi utilizado o downsca...
por Portal Padrão
publicado
23/08/2011
2:07 PM
Short-term wind power forecast based on numerical weather predictions and neural network approach for northeastern Brazil.
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por Portal Padrão
publicado
23/08/2011
2:06 PM
Influência do tipo de leito nos processos de combustão via recirculação química.
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por Portal Padrão
publicado
23/08/2011
2:05 PM
Meteorological and Environmental Data Integrated in a computational system to support smart grids.
Meteorological and environmental aspects are the number one cause of electric utility power distribution interruptions all over the planet. In Brazil, about 40-50% of the interruptions in the distribution systems are caused only by lightning. In this work is described a new computational system call...
por Portal Padrão
publicado
23/08/2011
2:03 PM
GEO + ES hybrid optimization algorithm applied to the parametric thermal model estimation of a 200n hydrazine thruster.
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por Portal Padrão
publicado
23/08/2011
2:02 PM
Impacto do ENOS e da ODP na ocorrência de geadas no Rio Grande do Sul.
O conhecimento do comportamento das geadas no RS é bem relevante, considerando seu impacto na agricultura. Sabe-se que sua ocorrência está vinculada a mudanças na circulação atmosférica, que podem ser afetadas pelo ENOS. Mas o ENOS interage com outros padrões, especialmente a ODP. Neste trab...
por Portal Padrão
publicado
23/08/2011
2:00 PM
An electric field-mill network in southeastern Brazil foi lightning warnings.
Several works deal with lightning warning methods developed from CG lightning locations systems (LLS) [Murphy and Cummins, 2000; Murphy, Demetriades and Cummins, 2002; Holle, Murphy and Lopez, 2003]. Additionally, other particular works combine total lightning with weather radar information in an ef...
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