Multiresolution Decomposition
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Inertial Measurement Unit Calibration Procedure for a Redundant Tetrahedral Gyro Configuration with Wavelet Denoising
Abstract: The aim of this paper was to present a calibration procedure applied to an inertial measurement unit composed of a triad of accelerometers and four gyros in a tetrad configuration. The procedure has taken into account a technique based on least-square methods and wavelet denoising to perform the best estimate of the sensor axis misalignments. The w
J. Aerosp. Technol. Manag.. Publicado em: 2012-06
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2. NÃO-ESTACIONARIEDADE DE SÉRIES TEMPORAIS TURBULENTAS E A GRANDE VARIABILIDADE DOS FLUXOS NAS BAIXAS FREQUÊNCIAS / TIME SERIES NON-STATIONARITY AND THE LARGE LOW FREQUENCY TURBULENT FLUX VARIABILITY
A complexidade de escoamentos turbulentos causa dificuldade para a descrição de fenômenos complexos, como o transporte de grandezas vetoriais e escalares na baixa atmosfera, fazendo com que a análise de dados experimentais, principalmente séries temporais, seja amplamente utilizada. O método mais utilizado pela comunidade micrometeorológica para quant
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/08/2011
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3. TURBULENT EXCHANGE OF SCALARS ABOVE AND WITHIN AN ARAUCARIA FOREST IN SOUTHERN BRAZIL / TROCAS TURBULENTAS DE ESCALARES ACIMA E NO INTERIOR DE UMA FLORESTA DE ARAUCÁRIA NO SUL DO BRASIL
Turbulent exchange of scalars is analyzed for a year of turbulence data, above and within an Araucaria Forest in southern Brazil. Sensible and latent heat fluxes, as well as CO2 fluxes are calculated by the eddy covariance method and analyzed in terms of the seasonal variation of their daily cycles. Diurnal and nocturnal vertical velocity spectra, sensible a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/07/2011
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4. Adaptive image denoising using scale and space consistency
This paper proposes a new method for image denoising with edge preservation, based on image multiresolution decomposition by a redundant wavelet transform. In our approach, edges are implicitly located and preserved in the wavelet domain, whilst image noise is filtered out. At each resolution level, the image edges are estimated by gradient magnitudes (obtai
Publicado em: 2011
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5. Electrical system fault based on the resulting magnetic signature by Wavelet. / Análise da assinatura magnética resultante de faltas em sistemas elétricos via wavelets.
A methodology based on the analysis of magnetic fields for monitoring the quality of energy in electrical systems is presented herein. Aspects referring to fault detection in electrical systems in particular are evaluated. Contrary to the traditional monitoring process, in which sensors must be physically linked to the circuits under analysis, the results ar
Publicado em: 2009
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6. Um metodo de compressão de audio baseado na codificação de Subbandas Wavelets
This work presents a method for audio compression based on wavelets sub-band quantization and coding, and proposes a coder based on that method. First, the work describes the Wavelet Transform with emphasis on the concepts of multi-resolution analyzes and their relationship with filtering processes and decomposition in sub-bands. A description of the Wavelet
Publicado em: 2001