Optimización multiobjetivo usando un algoritmo genético y un operador elitista basado en un ordenamiento no-dominado (nsga-ii)

Este artículo presenta conceptos básicos de la optimización multiobjetivo, enfocados hacia la descripción del algoritmo NSGA-II, el cual es conocido en la literatura especializada por su buen desempeño y por los pocos cambios necesarios respecto al algoritmo mono-objetivo para ser implementado apropiadamente

Optimización Multiobjetivo Usando Colonia De Hormigas Para Ubicar Condensadores En Sistemas De Distribución

En este artículo se pretende cambiar el formato clásico de optimización del problema de ubicación y dimensionamiento de condensadores en sistemas de distribución y presentarlo desde la perspectiva multiobjetivo de una reducción de pérdidas contra el aumento de los costos de inversión. Se utiliza como algoritmo de búsqueda la metaheheurística colonia de hormigas, adaptando sus mecanismos de exploración para ser guiados por el concepto de dominancia. El algoritmo es probado con un sistema de la literatura especializada, obteniendo resultados de muy alta calidad

Optimización Multiobjetivo Usando Colonia De Hormigas Para Ubicar Condensadores En Sistemas De Distribución

En este artículo se pretende cambiar el formato clásico de optimización del problema de ubicación y dimensionamiento de condensadores en sistemas de distribución y presentarlo desde la perspectiva multiobjetivo de una reducción de pérdidas contra el aumento de los costos de inversión. Se utiliza como algoritmo de búsqueda la metaheheurística colonia de hormigas, adaptando sus mecanismos de exploración para ser guiados por el concepto de dominancia. El algoritmo es probado con un sistema de la literatura especializada, obteniendo resultados de muy alta calidad

Optimización Multiobjetivo Usando Colonia De Hormigas Para Ubicar Condensadores En Sistemas De Distribución

En este artículo se pretende cambiar el formato clásico de optimización del problema de ubicación y dimensionamiento de condensadores en sistemas de distribución y presentarlo desde la perspectiva multiobjetivo de una reducción de pérdidas contra el aumento de los costos de inversión. Se utiliza como algoritmo de búsqueda la metaheheurística colonia de hormigas, adaptando sus mecanismos de exploración para ser guiados por el concepto de dominancia. El algoritmo es probado con un sistema de la literatura especializada, obteniendo resultados de muy alta calidad

Avances y perspectivas de la ingeniería 4.0

Este libro es resultado de los trabajos finales presentados en el I Congreso Internacional de Ingeniería 4.0 realizado los días 24 y 25 de octubre de 2019 organizado por la Facultad de Ingeniería de la Universidad Libre Seccional Pereira

Research advances in Risaralda. An overview of 8 experiences

I am honored to present to you this remarkable book, a testament to the invaluable research conducted in the fields of Health, Law, Engineering, and Administrative Sciences. Each chapter within these pages represents the culmination of extensive investigations carried out by dedicated scholars affiliated with the Red Universitaria de Risaralda (RUN), a network comprising 15 esteemed higher education institutions. Risaralda has emerged as a thriving hub for higher education, bolstered by its strategic geographical location, high quality of life, rich biodiversity, and competitive development. Today, Pereira ranks third in the index of university cities, with a student enrollment rate exceeding 63%. Close to 50,000 students pursue academic programs within the department. Notably, three institutions have achieved accreditation for their excellence in education, positioning Risaralda among the most competitive regions in terms of accredited academic programs. As we celebrate the 20th anniversary of the Red Universitaria de Risaralda in 2023, it is with great pride that we reflect on its pivotal role in fostering collaboration among public and private higher education institutions. Our mission has been twofold: attracting students to our region and supporting sustainable development and quality of life for our community. The mesa de investigación (research committee) has diligently coordinated the necessary actions to unite our researchers, facilitating an integrated approach to various disciplines and themes associated with the challenges faced in our region.CONTENT Introduction...................................................................................................................5 CHAPTER ONE. Tobacco Use and Social Skills in Children from Two Schools in Pereira, Colombia .......................................................................................................9 Angélica María Blanco Vanegas, Natalia Jeaneth Carmona Valencia and Ángela Liceth Pérez Rendón CHAPTER TWO. Lesbian visibility: between control and family silence.................................................35 Mireya Ospina Botero and Carolina Carmona Castilla CHAPTER THREE. New centralities in the city of Pereira, 1990-2019 .......................................................65 Cesar Augusto Castaño Galvis CHAPTER FOUR. Bibliometric analysis of scientific publications on the effect of roots on slope stability ...........................................................................................................95 Alejandro Alzate Buitrago, Raúl Alberto Gaviria Valencia, César Augusto Peñuela Meneses, Carlos Alberto Ospina Parra CHAPTER FIVE. Sustainability of local agri-food systems in a municipality of the Eje Cafetero, Colombia...............................................................................................131 Jaime Cardona Ocampo, Orlando Ospina Salazar and Julia Arredondo Botero CHAPTER SIX. Organizational strategies aimed at the Emberá Chamí unified indigenous reservation, Inamurcito community located in the municipality of Pueblo Rico, Risaralda............................................................................................................163 Carla Johana Martínez García and Yenny Marcela Vélez Herrera CHAPTER SEVEN. Psychomotor profile of children between 4 and 5 years old in the city of Pereira, Colombia ...................................................................................................199 Jhonatan Gonzalez-Santamaría and Claudia Jimena Lopez-Garcia CHAPTER EIGHT. Analysis of assembly tasks without the use of vision: an opportunity for the design of support technologies in manufacturing environments.....................217 Gustavo Adolfo Peña Marín, Carlos Andrés Quintero Diaztagle and Juan Diego Gallego Góme

Desenvolvimento de técnicas e modelos matemáticos para solução de problema de planejamento da expansão e operação de sistemas de distribuição de energia elétrica com geradores distribuídos

Neste trabalho é proposto um modelo matemático para determinar o impacto da penetração de fontes de geração distribuída nos estudos de planejamento da expansão e de operação de sistemas elétricos de distribuição. A geração distribuída é usada para expandir a capacidade de fornecimento de energia da rede, melhorar a sua eficiência e ainda melhorar os índices de continuidade no fornecimento de energia elétrica aos usuários. O modelo proposto busca minimizar os custos na operação da rede, mantendo a regulação da tensão e obedecendo as restrições de capacidade de fluxo de corrente nos alimentadores e transformadores das subestações, e, por outro lado, maximizar os índices de confiabilidade do sistema. Os índices de confiabilidade da rede estão relacionados com o cálculo do custo da energia não fornecida devido à resposta do sistema de proteção na eliminação de faltas temporárias, assim como do isolamento de faltas permanentes. Neste cálculo é levado em consideração o tipo de cliente que é afetado pela operação normal do sistema de proteção, assim como o funcionamento próprio de cada dispositivo de proteção, sendo, no caso, considerada a instalação de elos-fusíveis, religadores e relés de sobrecorrente. Adicionalmente, considera-se a possibilidade da operação ilhada das fontes de geração distribuída a partir da instalação adequada de relés de sobrecorrente com característica direcional e capacidade de religamento sincronizado. Isto, com vistas à criação de um sistema restaurativo que minimize o custo da energia não fornecida aos usuários conectados à zona ilhada. Para mostrar as vantagens do modelo matemático e da técnica de solução propostos são apresentados e discutidos os resultados obtidos de simulações em um alimentador real de 135 barrasThis work proposes a mathematical model to analyze the impact of installing distributed generation sources in expansion planning studies and electrical operation of distribution systems. The main focus is to determine the trade-off between the reliability and operational costs of distribution networks when the operation of isolated areas is allowed. The model searches to minimize the network costs by mean of optimal settings of the active power delivered from the power sources connected to the grid. Meanwhile the voltage regulation and the overload condition at the substation transformer and the grid lines are guaranteed. Simultaneously, the type and location of the protective devices initially installed on the protection system are reconfigured in order to minimize the interruption cost, as well as the expenditure for adjusting the protection system to the conditions imposed by the operation of dispersed units. In addition, in order to increase the system reliability, the model attempts to minimize the cost of the energy not supplied to customers due to normal tripping of the protection system in the elimination of temporary faults, as well as the isolation of permanent faults. This calculation takes into account the type of customer being affected by such normal tripping. The isolated operation of dispersed generation is allowed by installing directional overcurrent relays with synchronized reclose capability. The results for a 135-bus real-life power system are presented in order to evidence the advantage of the proposed mode

Algoritmo de recocido simulado aplicado al problema de secuenciamiento regular

In this paper a detailed description of the simulated annealing algorithm is presented. This strategy was employed to solve a well know flow-shop problem, which behavior is featured by the combinatorial explosion and non linear modeling. Therefore, the strategy could be focused to analyze the efficiency of the production in facilities with limited resources. Simulations results performed in a problem in the literature are presented. By this mean, the wide versatility, efficiency, and the easy implementation of the proposed algorithm is verified.En este trabajo se realizó una descripción detallada del algoritmo de Recocido Simulado como metodología de solución a problemas de optimización combinatorial. Este se enfocó especialmente a la solución del problema de secuenciamiento de tareas dentro de una planta de producción con recursos limitados. Se presentan resultados de simulaciones realizadas sobre un problema de la literatura especializada, mostrando la amplia versatilidad, eficiencia, y facilidad de implementación del algoritmo propuesto

NEOTROPICAL CARNIVORES: a data set on carnivore distribution in the Neotropics

Mammalian carnivores are considered a key group in maintaining ecological health and can indicate potential ecological integrity in landscapes where they occur. Carnivores also hold high conservation value and their habitat requirements can guide management and conservation plans. The order Carnivora has 84 species from 8 families in the Neotropical region: Canidae; Felidae; Mephitidae; Mustelidae; Otariidae; Phocidae; Procyonidae; and Ursidae. Herein, we include published and unpublished data on native terrestrial Neotropical carnivores (Canidae; Felidae; Mephitidae; Mustelidae; Procyonidae; and Ursidae). NEOTROPICAL CARNIVORES is a publicly available data set that includes 99,605 data entries from 35,511 unique georeferenced coordinates. Detection/non-detection and quantitative data were obtained from 1818 to 2018 by researchers, governmental agencies, non-governmental organizations, and private consultants. Data were collected using several methods including camera trapping, museum collections, roadkill, line transect, and opportunistic records. Literature (peer-reviewed and grey literature) from Portuguese, Spanish and English were incorporated in this compilation. Most of the data set consists of detection data entries (n = 79,343; 79.7%) but also includes non-detection data (n = 20,262; 20.3%). Of those, 43.3% also include count data (n = 43,151). The information available in NEOTROPICAL CARNIVORES will contribute to macroecological, ecological, and conservation questions in multiple spatio-temporal perspectives. As carnivores play key roles in trophic interactions, a better understanding of their distribution and habitat requirements are essential to establish conservation management plans and safeguard the future ecological health of Neotropical ecosystems. Our data paper, combined with other large-scale data sets, has great potential to clarify species distribution and related ecological processes within the Neotropics. There are no copyright restrictions and no restriction for using data from this data paper, as long as the data paper is cited as the source of the information used. We also request that users inform us of how they intend to use the data