Spectral Discrimination
Mostrando 1-12 de 63 artigos, teses e dissertações.
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1. DESHADOWING OF HIGH SPATIAL RESOLUTION IMAGERY APPLIED TO URBAN AREA DETECTION
Abstract Different built-up structures usually lead to large regions covered by shadows, causing partial or total loss of information present in urban environments. In order to mitigate the presence of shadows while improving the urban target discrimination in multispectral images, this paper proposes an automated methodology for both detection and recovery
Bol. Ciênc. Geod.. Publicado em: 10/07/2019
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2. Use of Infrared Spectroscopy and Near Infrared Hyperspectral Images to Evaluate Effects of Different Chemical Agents on PET Bottle Surface
PET - poly (ethylene terephthalate) - bottle surfaces were exposed to chemical agents and evaluated with middle infrared spectroscopy (MIR) and near infrared hyperspectral imaging (HSI-NIR). Images (928-2.524 nm) were acquired at different times from bottle surfaces exposed to alkaline, acidic and ethanolic media. Savitzky-Golay smoothing (2nd order polynomi
Mat. Res.. Publicado em: 09/08/2018
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3. Irrigation and Light Access Effects on Coffea arabica L. Leaves by FTIR-Chemometric Analysis
Coffee bean chemical compositions has been extensively studied. However, there is a small amount of research on other parts of the coffee plant, including leaves. Fourier transform infrared (FTIR) spectral profiles of Coffea arabica L. cv. IAPAR 59 leaf extracts from a simplex-centroid design were studied by principal component analysis (PCA) to evaluate the
J. Braz. Chem. Soc.. Publicado em: 2018-01
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4. Application of FT-IR spectroscopy to assess physiological stress in rugby players during fatigue test
AbstractIntroduction: The diagnosis based on salivary biomarkers provides information about the physiological condition. However, the clinical trials used to analyze these biomarkers are relatively expensive and laborious. Thus, the purpose of this study was to identify the physiological stress in players using Fourier transform infrared spectroscopy (FT-IR)
Res. Biomed. Eng.. Publicado em: 07/07/2016
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5. Assessment of sugarcane harvesting residue effects on soil spectral behavior
ABSTRACT When the harvesting of sugarcane involves a mechanized process, plant residues remain on the soil surface, which makes proximal and remote sensing difficult to monitor. This study aimed to evaluate, under laboratory conditions, differences in the soil spectral behavior of surface layers Quartzipsamment and Hapludox soil classes due to increasing lev
Sci. agric. (Piracicaba, Braz.). Publicado em: 2016-04
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6. Detection of movement intention using EEG in a human-robot interaction environment
Introduction : This paper presents a detection method for upper limb movement intention as part of a brain-machine interface using EEG signals, whose final goal is to assist disabled or vulnerable people with activities of daily living. Methods EEG signals were recorded from six naïve healthy volunteers while performing a motor task. Every volunteer remain
Res. Biomed. Eng.. Publicado em: 27/11/2015
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7. INFLUÊNCIA DA IDADE DAS FOLHAS DE
Eugenia uniflora L. NA COMPOSIÇÃO QUÍMICA DO ÓLEO ESSENCIALGC-FID, GC-MS and NMR spectral data were used to analyze the composition of the essential oils extracted from young and mature leaves of
E. uniflora L. grown in Seropédica - RJ. Thirty and twenty-five compounds were identified, corresponding to approximately 98.19% and 93.77% of the total amount of oils, respectively. The major componentQuím. Nova. Publicado em: 2015-07
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8. Neurophysiological correlates of color vision: a model
The tree-receptor theory of human color vision accounts for color matching. A bottom-up, non-linear model combining cone signals in six types of cone-opponent cells in the lateral geniculate nucleus (LGN) of primates describes the phenomenological dimensions hue, color strength, and lightness/brightness. Hue shifts with light intensity (the Bezold-Brücke ph
Psychol. Neurosci.. Publicado em: 2013
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9. Discriminação de espécies florestais com a utilização da razão isotópica C ⁵N e a espectroscopia no infravermelho próximo (FT-NIRs) / Forest species discrimination utilising C ⁵N isotopic ratio and near infrared reflectance spectroscopy (FT-NIRS)
The combined use of high technology instruments and appropriate techniques for discriminating tree species isnecessary to improve the biodiversity inventory system in tropical countries. This study was carried out to verify the performance of C and N isotopes ratios, the total leaf concentration values of C and N (%) and near-infrared spectroscopy readings a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/04/2011
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10. Comparison of two computerized procedures for the assessment of color discrimination in Cebus apella
Color vision consists of the discrimination of objects based on their spectral composition. Among primates, the majority of Platyrrhini monkeys are estimated to have polymorphic and sex-linked dichromacy. The objective of this study was to compare the results produced by different equipment and software for the assessment of tri- and dichromatic conditions i
Psychology & Neuroscience. Publicado em: 2011-12
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11. Characterization and discrimination of soils by their reflected electromagnetic energy.
The objective of this work was to verify if reflected energy of soils can characterize and discriminate them. A spectroradiometer (Spectral reflectance between: 400-2,500 nm) was utilized in laboratory. The soils evaluated are located in Bauru region, SP, Brazil, and are classified as Typic Argiudoll (TR), Typic Eutrorthox (LR), Typic Argiudoll (PE), Typic H
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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12. Espectroscopia de fluorescência para detecção de lesões potencialmente malignas e carcinoma epidermóide da cavidade oral : estudo prospectivo / Fluorescence spectroscopy for detection of premalignant lesions and squamous cell carcinoma of the oral cavity : prospective study
Oral cancer is a public health problem with high incidence in the Brazilian population. The affected patient usually presents for clinical investigation, with advanced stage disease, the consequence of this delay is a reduction in survival rates. Given this, its essential to detect oral cancer in early stages. Fluorescence spectroscopy is a non-invasive di
Publicado em: 2011