Semi Labeled Samples
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Classificação de dados imagens em alta dimensionalidade, empregando amostras semi-rotuladas e estimadores para as probabilidades a priori / Classification of high dimensionality image data, using semilabeled samples and estimation of the a priori probabilities
Em cenas naturais, ocorrem com certa freqüência classes espectralmente muito similares, isto é, os vetores média são muito próximos. Em situações como esta dados de baixa dimensionalidade (LandSat-TM, Spot) não permitem uma classificação acurada da cena. Por outro lado, sabe-se que dados em alta dimensionalidade tornam possível a separação dest
Publicado em: 2008
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2. Classificação supervisionada de padrões utilizando floresta de caminhos otimos / Supervised pattern classification using optimum path forest
Patterns are usually represented by feature vectors obtained from samples of a dataset, which can be fully, partially or non labeled. Depending on the amount of available information of these datasets, three kinds of pattern identification techniques can be applied: supervised, semi-supervised or non supervised. In this work, we addressed the supervised ones
Publicado em: 2008
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3. Desenvolvimento e avaliação de uma metodologia para detecção de mudanças na cobertura vegetal do semi-árido. / Development and evaluation of a methodology for detection of changes in the vegetal cover of the semi-arid one.
In this work a methodology for the change detection in vegetation cover of semi-arid region was developed, using multi-temporal images of TMLandsat, in the red spectral band. In order to implement operationally this methodology two digital techniques were developed. These techniques do not need to make use of images with atmospheric correction for the genera
Publicado em: 2004
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4. Separation of the complementary strands of DNA fragments on polyacrylamide gels.
32P-labeled (in vivo) phiX174 RFI DNA was restricted by Hinc II. Three aliquots of the same digest: a) nondenatured, b) heat denatured, and c) denatured by 5 mM Me-HgOH were analyzed on 3-15% acrylamide gel gradients or on 3% gels with reduced N,N'-methylene-bis-acrylamide. The autoradiography of the gels showed that the nondenatured sample migrates two time
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5. Decomposition of Microbial Cell Components in a Semi-Arid Grassland Soil
Cell component fractions (14C-labeled) were prepared from bacterial and fungal cultures isolated from the Pawnee National Grassland in northeastern Colorado and tested for seasonal changes in degradability. The decomposition of cell component fractions was monitored from May to December of 1977 and during March of 1978, using soil samples taken at 2- to 3-we
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6. Reverse Southern hybridization.
A DNA oligomer 25 nucleotides long which contained an HMT (4'-hydroxymethyl-4,5', 8-trimethylpsoralen) furan side monoadduct to thymidine at a 5'-TpA-3' site was used as a probe for the polylinker sequence present in single-stranded M13 mp19 DNA and in double-stranded pUC 19 DNA. Hybridization and photofixation were carried out simultaneously in solution und