Inverse Filter
Mostrando 13-19 de 19 artigos, teses e dissertações.
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13. APLICAÇÃO DE FILTROS ESPACIAIS À RESTAURAÇÃO DE IMAGENS MAGNÉTICAS OBTIDAS EM ENSAIOS NÃO-DESTRUTIVOS / SPATIAL FILTERS APPLICATION TO THE RESTAURATION OF NON-DESTRUCTIVE ESSAY MAGNETIC IMAGES
Desenvolveu-se uma técnica de restauração de imagens de defeitos existentes em materiais ferromagnéticos, obtidas pela solução do problema inverso para sinais simulados proveniente do método de Ensaios Não-Destrutivos conhecido como Magnetic Flux Leakage. Baseada em princípios de filtragem ótima, a técnica visa reduzir distorções introduzidas na
Publicado em: 1997
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14. UTILIZAÇÃO DE UM MAGNETÔMETRO SUPERCONDUTOR PARA OBTENÇÃO DE IMAGEM DE FONTES DE CAMPO MAGNÉTICO / USING A SUPERCONDUCTOR MAGNETOMETER TO GENERASE MAGNETIC FIELD SOURCES IMAGE
A grande demanda por visualização através de imagens aliada ao caracter não invasivo das medidas de campo magnético motiva o desenvolvimento de ferramentas para o processamento de sinais em biomagnetismo. A técnica de filtragem inversa no domínio da freqüência, utilizada para restauração de imagens óticas, foi aplicada para se obter, a partir do
Publicado em: 1992
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15. Optimal Solutions to a Linear Inverse Problem in Geophysics
This paper is concerned with the solution of the linear system obtained in the Backus-Gilbert formulation of the inverse problem for gross earth data. The theory of well-posed stochastic extensions to illposed linear problems, proposed by Franklin, is developed for this application. For given estimates of the statistical variance of the noise in the data, an
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16. Processivity, Synergism, and Substrate Specificity of Thermobifida fusca Cel6B ▿
A relationship between processivity and synergism has not been reported for cellulases, although both characteristics are very important for hydrolysis of insoluble substrates. Mutation of two residues located in the active site tunnel of Thermobifida fusca exocellulase Cel6B increased processivity on filter paper. Surprisingly, mixtures of the Cel6B mutant
American Society for Microbiology (ASM).
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17. Inhibition and Agglutination of Arthrobacters by Pseudomonads
The bacterial flora of water in Narragansett Bay, R.I., was observed semimonthly from 1962 to 1964. Dominant isolates were keyed to genus, and the isolates for each genus were expressed as percentage of total isolates. There was a consistent inverse relationship between arthrobacters and the dominant pseudomonads. Pseudomonad growth on agar plates markedly i
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18. Preventing errors when estimating single channel properties from the analysis of current fluctuations.
The conductance, number, and mean open time of ion channels can be estimated from fluctuations in membrane current. To examine potential errors associated with fluctuation analysis, we simulated ensemble currents and estimated single channel properties. The number (N) and amplitude (i) of the underlying single channels were estimated using nonstationary fluc
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19. Biochemical properties of hepatitis C virus NS5B RNA-dependent RNA polymerase and identification of amino acid sequence motifs essential for enzymatic activity.
The NS5B protein of the hepatitis C virus (HCV) is an RNA-dependent RNA polymerase (RdRp) (S.-E. Behrens, L. Tomei, and R. De Francesco, EMBO J. 15:12-22, 1996) that is assumed to be required for replication of the viral genome. To further study the biochemical and structural properties of this enzyme, an NS5B-hexahistidine fusion protein was expressed with