Linear Mixing Model
Mostrando 1-12 de 26 artigos, teses e dissertações.
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1. Ultrafast Dynamics of Au Nanopyramid Interfaces Prepared by Nanosphere Lithography: Effect of Substrate Chemical Composition
This work describes ultrafast spectroscopy studies of Au triangular pyramid particle arrays deposited over glass (termed Au/glass), and 190 nm indium tin oxide (ITO) film (termed Au/ITO/glass) prepared by nanosphere lithography. The linear absorption spectra of Au/glass and Au/ITO/glass exhibit surface plasmon resonances at 800 and 870 nm, respectively, in g
J. Braz. Chem. Soc.. Publicado em: 2016-02
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2. Modelagem de equilíbrio líquido-líquido, líquido-vapor e líquido-líquido-vapor para sistemas binários, ternários, quaternários e pseudo-quaternários, envolvendo a produção de biodiesel / Modeling of liquid-liquid, liquid-vapor and liquid-liquid-vapor equilibria for binary, ternary, quarternay and pseudo-quaternary systems involving biodiesel production
The worldwide energy demand increases every year. This demand will reach levels that cannot be supplied by current conventional fossil fuel resources. In this context, biofuels arise as a growing primary source of energy, raising research opportunities and encouraging technology development. An important technical issue related to biofuels development is the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/01/2012
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3. Monitoramento da zona superficial de neve úmida da Península Antártica pelo uso de dados dos sensores SMMR e SSM/I
Special Sensor Microwave-Imager (SSM/I) EASE-grid data and classified ASAR wideswath (WS) images, covering the Antarctic Peninsula (AP), were processed and used in a Spectral Linear Mixing Model (SLMM) for a subpixel analysis of the Wet Snow Zone (WSZ) in SSM/I images. The components¿ proportions (fraction images) of the endmembers in the study area, namely
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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4. Detecção de mudanças a partir de imagens de fração
Land cover change detection is a major goal in multitemporal remote sensing applications. It is well known that images acquired on different dates tend to be highly influenced by radiometric differences and registration problems. Using fraction images, obtained from the linear model of spectral mixing (LMSM), radiometric problems can be minimized and the int
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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5. Metodologia de classificação de imagens multiespectrais aplicada ao mapeamento do uso da terra e cobertura vegetal na Amazônia: exemplo de caso na região de São Félix do Xingu, sul do Pará. / Methodology for multispectral image classification applied to the mapping of land use and land cover in Amazonia: a case example in the region of Sao Felix do Xingu, south of Para.
Este trabalho apresenta uma metodologia de classificação de imagens multiespectrais aplicada a análise e mapeamento da evolução do uso da terra/cobertura vegetal em São Félix do Xingu, Sul do Pará. Imagens frações representando as proporções de sombra, vegetação e solo foram estimadas a partir das bandas 1 a 5 e 7 do Landsat-5 TM e relacionadas
Publicado em: 2010
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6. Utilização de dados orbitais na implementação do modelo da estabilidade dos solos / Use of orbital data on a soil stability model
Determinar as áreas mais suscetíveis a erosão, tendo como subsídio um modelo da estabilidade dos solos (MES) alternativo à Universal Soil Loss Equation (USLE), proporcionando o zoneamento ambiental da área de estudos, foi o objetivo deste trabalho. Para a implementação do modelo foram utilizados dados de aptidão dos solos, declividade e vegetação,
Publicado em: 2009
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7. Spatial variability of phoma spot and nutritional aspects of coffee plants and incidence of brown eye spot in coffee quality. / Variabilidade espacial da mancha de phoma relacionada à nutriÃÃo do cafeeiro e incidÃncia da cercosporiose na qualidade do cafÃ.
The present work aimed to apply geostatistic to evaluate the spatial and temporal variability of coffee phoma spot intensity and nutrition under conventional and organic cropping systems, verify the relationship between the nitrogen/potassium (N/K) ration and the phoma spot intensity and coffee seedlings nutritional aspects, grown under nutrient solution, ev
Publicado em: 2009
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8. HILDEBRAND SOLUBILITY PARAMETERS OF THE OIL AND MIXING OIL-HEPTANE ON THE THRESHOLD OF THE PRECIPITATION EMPLOYEE ASPHALTENES MICROSCOPY OPTICS AND SPECTROSCOPY A NEAR-INFRARED (NIR) / PARÂMETROS DE SOLUBILIDADE DE HILDEBRAND DOS PETRÓLEOS E DA MISTURA PETRÓLEO-HEPTANO NO LIMIAR DA PRECIPITAÇÃO DOS ASFALTENOS EMPREGANDO MICROSCOPIA ÓPTICA E ESPECTROSCOPIA DE INFRAVERMELHO-PRÓXIMO (NIR)
The Hildebrand solubility parameter is used to express the compatibility of petroleum in mixtures, starting from the principle that, independently from the system composition, the asphaltenes always precipitate in a certain solubility parameter, known as the flocculation parameter, which estimated value is 16,35 (MPa)1/2. In this paper, it was tried to exper
Publicado em: 2009
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9. Estimativa de áreas queimadas com produtos modis como subsídio à estimativa de emissões de gases de efeito estufa pela queima de biomassa na Amazônia e Cerrado Brasileiros / Burned area estimation using MODIS fire products as a subsidy for greenhouse gases emissions estimation due biomass burning in the Brazilian Amazon and Cerrado.
At present, the estimates of parameters used in global emissions models are based on low and moderate spatial resolution satellite data, and even though those was an advanced since the rising of the first orbital platforms, it is still necessary to reduce the uncertainty of these estimates. This improvement depends basically, on the capacity of the scientifi
Publicado em: 2009
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10. Prediciton of high-pressure vapor liquid equilibrium of six binary systems, carbon dioxide with six esters, using an artificial neural network model
Artificial neural networks are applied to high-pressure vapor liquid equilibrium (VLE) related literature data to develop and validate a model capable of predicting VLE of six CO2-ester binaries (CO2-ethyl caprate, CO2-ethyl caproate, CO2-ethyl caprylate, CO2-diethyl carbonate, CO2-ethyl butyrate and CO2-isopropyl acetate). A feed forward, back propagation n
Brazilian Journal of Chemical Engineering. Publicado em: 2008-03
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11. Center metallic effect on intermolecular interactions of complexes [M(CN)5NO]x- with poly(ethylene oxide) in aqueous two-phase systems / Efeito do centro metálico nas interações intermoleculares dos complexos [M(CN)5NO]x- com o poli(óxido de etileno) em sistemas aquosos bifásicos
In this thesis has been studied the metallic center influences of pentacianonitrosylmetalates, [M(CN)5NO]x-, on the partition coefficient (K), of these complex anions in aqueous two-phase systems (ATPS). The ATPS were obtained by mixing stock aqueous solutions of an inorganic salt (Li2SO4 or Na2SO4) with a stock solution of poly(ethylene oxide) of average mo
Publicado em: 2007
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12. Avaliação do modelo 5-scale para simular valores de reflectância de unidades de paisagem da floresta nacional do Tapajós / Evaluation of 5-scale model to simulate reflectance values of landscape units of Tapajós national forest
The increased pressure over natural resources makes efficient planning of its use necessary, as well as monitoring and restraining inadequate and/or illegal practices. For this, remote sensing allied with several specialized areas is presented as an excellent tool. However one of the great challenges of remote sensing is to equate the problem that similar ta
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/05/2006