Examinando por Materia "VARIABLES (ESTADÍSTICA)"
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Ítem Análisis estratégico sobre el tipo de inversión que debe hacer una compañía del sector eléctrico para cubrir su necesidad de transporte blindado en áreas de riesgo público(Universidad Eafit, 2020) Gómez Grimaldos, Camilo Andrés; Arias Sánchez, Juan ManuelThe analysis of investment decisions requires both quantitative variables (costs, expenses and income), as well as the company’s strategic context and the different means to meet its needs. This paper intends to use a business case to determine the best way to solve a power generation company’s need for armored transport. This company performs its activities in high public risk areas, and this covers this need through a vendor contract. The proposed methodology is to compare the Net Present Value of the different investment options. A recommendation is made in terms of the best investment decision resulting from a strategic analysis and enriched by a risk analysis based on the ISO 31000 standard.Ítem Assessing the effects of Multivariate Functional outlier identification and sample robustification on identifying critical PM2.5 air pollution episodes in Medellín, Colombia(Universidad EAFIT, 2022) Roldán Alzate, Luis Miguel; Zuluaga Díaz, Francisco IvánIdentification of critical episodes of environmental pollution, both as a outlier identification problem and as a classification problem, is a usual application of multivariate functional data analysis. This article addresses the effects of robustifying multivariate functional samples on the identification of critical pollution episodes in Medellín, Colombia. To do so, it compares 18 depth-based outlier identification methods and highlights the best options in terms of precision through simulation. It then applies the two methods with the best performance to robustify a real dataset of air pollution (PM2.5 concentration) in the Metropolitan Area of Medellín, Colombia and compares the effects of robustifying the samples on the accuracy of supervised classification through the multivariate functional DD-classifier. Our results show that 10 out of 20 methods revised perform better in at least one kind outliers. Nevertheless, no clear positive effects of robustification were identified with the real dataset.Ítem Considerando incertidumbre en regresores de un modelo Logit : la adopción de Internet en Medellín(Universidad Eafit, 2020) Carvajal Rendón, Daniela Alejandra; Ramírez Hassan, AndrésÍtem Métodos de clasificación para datos funcionales basados en el Clasificador DDG(Universidad EAFIT, 2021) Rios Naranjo, Johan Steward; Zuluaga Díaz, Francisco Iván; Zuluaga Díaz, Francisco IvánÍtem Modelo de lógica difusa para pronosticar la inflación en Colombia(Universidad EAFIT, 2019) Santiago Molina, Carlos Esteban; Hurtado Rendón, Álvaro ArturoÍtem Modelo para evaluar las variables operativas, niveles de inversión y variables para la venta en Minera El Roble(Universidad EAFIT, 2023) Feria Fortich, Fernán Esteban; Escalante Gómez, Juan EstebanÍtem Spreads of sovereign bonds issued in local and foreign currency : determinants for Colombia(Universidad Eafit, 2020) Marín Castaño, Deisy Johana; Agudelo Rueda, Diego AlonsoÍtem Valoración de la empresa Emtra por medio de flujo de caja descontado(Universidad EAFIT, 2020) Crespo Lorza, Italo Fabián; Támarus Ayus, Armano Lenin