J. D. de Melo

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In the last decades, the oil, gas and petrochemical industries have registered a series of huge accidents. Information flow can be an important tool to minimize hazards to health and environment. This paper proposes the use of the ontology concept as a tool to improve the knowledge management in a refinery, through the representation of a DEA plant, mixing(More)
—This paper presents a 3 rd order 1.5-bit ΣΔ modula-tor with distributed feedback and local resonator feedback for a Class D audio amplifier. In order to improve the signal-to-noise-and-distortion ratio (SNDR), without increasing the oversampling ratio (OSR) or the order of the modulator, the modulator uses transmission zeros and 1.5-bit quantization. High(More)
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