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Browsing Artículos de conferencia by Subject "06 Agua limpia y saneamiento"
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- ItemArsenic-related cancer mortality in Northern Chile, 1989-98(LIPPINCOTT WILLIAMS & WILKINS, 2004) Bates, M; Marshall, G; Ferreccio, C; Smith, A
- ItemHybrid modeling of froth flotation superficial appearance applying dynamic textures analysis(IEEE, 2008) Núñez Retamal, Felipe Eduardo; Cipriano, AldoFlotation is one of the most complex processes in mining industry. In fact, non linear characteristics, large delays, significant disturbances and important unmeasurable variables make the process very difficult for automatic control. However, experimented operators are able to take adequate control actions based on superficial froth appearance by defining several operational states. To ensure the obtaining of technical and economical benefits, it is necessary to better identify different operational states from the froth superficial appearance. In this work we propose a hybrid characterization of the froth surface applying dynamic texture techniques and texture classification. Results show that the models obtained represent accurately the froth dynamics and our detection algorithm is able to detect efficiently different froth operational states.
- ItemPredictive control with fuzzy characterization of percentage of solids, particle size and power demand for minerals grinding(IEEE, 2001) Orchard, M.; Flores Moltedo, Andrés Ricardo; Munoz, C.; Cipriano, AldoThe application of fuzzy predictive control to solve the regulatory problem in mineral grinding plants is considered. The controlled variables are percentage of solids, particle sizes and power demand and the manipulated variables are water and fresh ore flows. The controller uses linear multivariable models and the fuzzy characterization of the controlled variables, to calculate the manipulated variables. Simulation results under typical disturbances show a better performance compared with the conventional predictive control.