Examinando por Materia "VARIABLES ALEATORIAS"
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Ítem Acerca de la mejor ubicación de reservas pasivas en un sistema serie de dos componentes(Universidad EAFIT, 2018) Gómez Cortés, Christian Yamir; Valdés Castro, José EnriqueÍtem Energy management strategy for a solar race car including meteorologic and probabilistic variable(2018) Betancur Valencia, Esteban; Osorio Gómez, GilbertoThis thesis describes the energy management strategy for racing solar cars, the racing strategy is treated as an optimal control problem with random variables and uncertain predictions. A computational model is developed for estimating the vehicle performance under specific circumstances. Two evolutionary heuristic optimization methods are implemented and tested for this case, their effectiveness, convergence and efficiency is measured and compared to exhaustive search approaches. The dependency on solar radiation is validated using the computational model with different test cases. In order to reduce the uncertainties on the solar radiation estimation, satellite images are used as inputs to image processing and machine learning techniques, their efficacy is compared. Finally, a validation case is executed and different scenarios are evaluated with the inclusion of the proposed methods, the experimental performance of a vehicle obtained using the strategy in the World Solar Challenge 2015 is exposed and compared to the predicted results from the simulation.Ítem Heurístico de simulación-optimización para la configuración de un sistema de estantería selectiva simple(Ingeniare. Revista chilena de ingeniería, 2012) Vélez Gallego, Mario César; Castro Zuluaga, Carlos Alberto; Valencia Ramírez, Diego Andrés; Universidad EAFIT. Departamento de Ingeniería de Producción; marvelez@eafit.edu.co; dvalenc8@eafit.edu.co; ccastro@eafit.edu.co; Gestión de Producción y LogísticaA discrete event simulation-optimization heuristic is presented for configuring a selective pallet rack system -- To the rack system under study pallets arrive dynamically over time to be stored for a given period of time -- The storage duration, arrival time and pallet height are assumed to be continuous random variables with known density functions -- In such a system, if there is no available slot in the rack to store an arriving pallet, it is placed on the floor -- The proposed heuristic aims at minimizing the number ofracking banks needed so that the long term proportion of pallets that are placed in a rack slot reaches a minimum pre-specified value -- The computational experiments conducted suggest that the proposed heuristic effectively solves the problem under studyÍtem Modelación de una situación empresarial para la enseñanza de simulación discreta(Asociación Colombiana de Facultades de Ingeniería (ACOFI), 2013-09-24) Carmona González, Guillermo L.; Montoya Agudelo, Juan Sebastián; Cano Escobar, María Adelaida; Álvarez Zapata, Daniela; Rodríguez Betancur, María Antonia; Universidad EAFIT. Departamento de Ingeniería de Producción; mrodri23@eafit.edu.co; dalvar35@eafit.edu.co; mcanoes@eafit.edu.co; jmonto41@eafit.edu.co; gcarmona@eafit.edu.co; Gestión de Producción y LogísticaDiscrete simulation is one of the tools that are used for modeling real systems and for evaluating the impact of certain decisions using the resulting model, improving with this the decisions making on the real system -- Discrete simulation has been taught in the simulation course of the Operations Management and Logistics program at EAFIT University -- However this course only has academic exercises for the modeling processes -- This motivated to the realization of a project for documenting a business scenario on which students can build a simulation supported on a real situation -- This would allow students an approach to the modeling of real industry problems -- The productivity analysis of a production line of the Bakery Company Novapan in Medellin city was elected as the business scenario -- The simulation was made through the discreet simulation software Promodel ® -- This Paper presents the main aspects of the analyzed business scenario, the methodology, the discrete simulation model, some simulation results, the educational proposal and some learned lessons during the development of this researchÍtem Sobre una metodología para estimar altos cuantiles: una aplicación a la deserción(Universidad EAFIT, 2012) Rojas Rojas, Juan Bautista; Solano Atehortúa, José Antonio