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El presente documento describe el desarrollo de controladores inteligentes, para la supresión de armónicos en inversores monofásicos con modulación senoidal por ancho de pulso (SPWM). En la primera fase se diseño un controlador PI que sirve como modelo de referencia para la obtención de los patrones de entrenamiento de la red neuronal. Posteriormente se diseño un controlador PD lógico difuso utilizando una base de 25 reglas. Las simulaciones realizadas con el mkodelo matemático del inversor y utilizando "SimPowerSystems" de MATLAB indican que es posible obtener una onda senoidal pura con un mínimo de distorsión armónica total (THD) mediante el uso de los controladores inteligentes propuestos.

The routing cost and the assigned visited vertices cost can be determined in the median cycle problem using a simple cycle that connects the subsets of vertices of graph containing the two costs. The mixed integer linear model is suggested for problems arising in the circular-shaped transportation and telecommunication infrastructure.

This research addresses the optimization problem presented by the design of an interconnecting network of a UMTS radio mobile telephone system, proposing a new mixed integer linear programming model. The solution procedure was then evaulated against a database of actual problems and solutions from CSELT, a research lab affiliated with Telecom Italia.

Acute kidney injury (AKI), defined as an abrupt increase in serum creatinine, a reduced urinary output, or both, is experiencing considerable evolution in terms of our understanding of the pathophysiological mechanisms and its impact on other organs. Oxidative stress and reactive oxygen species (ROS) are main contributors to organ dysfunction in AKI, but they are not alone. The precise mechanisms behind multi-organ dysfunction are not yet fully accounted for. The building up of uremic toxins specific to AKI might be a plausible explanation for these disturbances. However, controversies have arisen around their effects in organs other than the kidney, because animal models usually depict AKI as a kidney-specific injury. Meanwhile, humans present AKI frequently in association with multi-organ failure (MOF). Until now, medium-molecular-weight molecules, such as inflammatory cytokines, have been proven to play a role in endothelial and epithelial injury, leading to increased permeability and capillary leakage, mainly in pulmonary and intestinal tissues.

Evaluates a branch-and-cut algorithm for finding an optimal solution to the Orienteering Problem. Families of valid inequalities as basis of the algorithm; Introduction of a family of cuts; Description of exact and heuristic separation algorithms; Analysis of a routing problem related to the Traveling Salesman Problem.