Flávio Geraldo Coelho Rocha

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A comparison of linear and non-linear regression method in selecting the optimum isotherm was made to the experimental equilibrium data of methylene blue sorption by activated carbon. The r2 was used to select the best fit linear theoretical isotherm. In the case of non-linear regression method, six error functions, namely coefficient of determination (r2),(More)
In this paper, we analyze the queueing performance in terms of loss rate of an OFDM (orthogonal frequency division multiplexing)/TDMA (time division multiplexing access) based wireless system taking into account the multifractal behavior of the wireless traffic flows. To this end, first, we show evidences of multifractal characteristics on wireless traffic(More)
1 Abstract— In this paper we propose a video traffic model based on a multifractal multiplicative cascade. In our proposal, we assume that the cascade multipliers can be efficiently described by autoregressive models in each cascade scale. This multiplicative cascade model with autoregressive process based multipliers is used for GOP (Group of Pictures)(More)
Resumo— O crescente volume de informações disponíveis em meios eletrônicos é um recurso estratégico para o profissional de saúde que utiliza desta fonte para apoiar a tomada de decisão. Por outro lado, torna-se inviável analisar um significativo volume de documentos em um curto espaço de tempo sem o apoio de uma ferramenta computacional. A Extração de(More)
—In this paper, we propose an adaptive allocation scheme which determines the number of time slots for each user in an OFDM/TDMA system using the Effective Bandwidth theory. For that purpose, we developed an algorithm to adaptively estimate the parameters of the MWM (Multifractal Wavelet Model) traffic model that allow us to calculate the effective(More)
– In this paper, we present an admission control scheme for an OFDM (Orthogonal Frequency-Division Multiplexing)/TDMA(Time Division Multiplexing Access) based wireless system taking into account the multifractal behaviour of the traffic flows. To this end, first, we show evidences of multifractal characteristics on wireless network traffic traces. These(More)