Revista Ingenierias Universidad de Medellin最新文献_第3页

Minimización del makespan para el problema de máquinas paralelas no relacionadas con tiempos de setup dependientes de la secuencia mediante un algoritmo híbrido VNS/ACO 基于VNS/ACO混合算法的与序列无关的并行机安装时间问题的最大完工时间最小化

Revista Ingenierias Universidad de Medellin Pub Date : 2021-04-09 DOI: 10.22395/rium.v20n38a11

E. Salazar-Hornig, Gina Andrea Soto Gavilán

引用次数: 0

Rural B-Learning Contexts to Support the Physics Area – An Academic Performance Analysis 支持物理领域的农村B学习环境——学业成绩分析

Revista Ingenierias Universidad de Medellin Pub Date : 2021-04-09 DOI: 10.22395/rium.v20n38a12

Fabinton Sotelo Gomez, Mario Solarte, Gustavo Ramirez González

引用次数: 0

Coffee Fun: Gamified Tool Based on the SUM Agile Development Methodology For Video Games 咖啡乐趣:基于SUM敏捷开发方法的游戏化工具

Revista Ingenierias Universidad de Medellin Pub Date : 2021-04-09 DOI: 10.22395/rium.v20n38a10

Manuel Esteban Jaramillo Reinel, Andrés Felipe Mera Tróchez, Katerine Márceles Villalba, G. Chanchí

引用次数: 0

Finite Element Analysis of An Evaporation System to Synthesize Kesterite thin Films 合成Kesterite薄膜蒸发系统的有限元分析

Revista Ingenierias Universidad de Medellin Pub Date : 2021-03-15 DOI: 10.22395/rium.v20n38a3

Carlos Eduardo Rondón Almeyda, Mónica Andrea Botero Londoño, R. Ospina Ospina

{"title":"Finite Element Analysis of An Evaporation System to Synthesize Kesterite thin Films","authors":"Carlos Eduardo Rondón Almeyda, Mónica Andrea Botero Londoño, R. Ospina Ospina","doi":"10.22395/rium.v20n38a3","DOIUrl":"https://doi.org/10.22395/rium.v20n38a3","url":null,"abstract":"Currently, there is an interest within the scientific community in thin-film solar cells with a Kesterite (Cu2ZnSnS4) type absorber layer, since they report a theoretical efficiency greater than 32 %. The synthesis of Kesterites by evaporation has allowed for efficiencies at the laboratory level of 11.6 %. Although these are good results, the design of the evaporation chamber and the distribution of the electrodes is essential to control synthesis parameters and evaporate each precursor in the corresponding stage. This project seeks to design an evaporation chamber that can achieve a vacuum of 10-5 mbar, increase the deposition surface and avoid each precursor evaporation in a non-corresponding stage. This last objective was studied using Comsol multiphysics R. (licensed product) software, with the adequate disposition of metallic precursors (zinc, copper, and tin) determined by analyzing heat distribution. It was concluded that the lower the evaporation temperature of the precursor, the smaller the height of the copper electrode in the system. This is because, with a lower height the concentration of heat in the container is lower.","PeriodicalId":31131,"journal":{"name":"Revista Ingenierias Universidad de Medellin","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43376559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Smart Campus at the Universidad Militar Nueva Granada: Creation of Base Map and Applications for Campus Tree Monitoring 新格拉纳达军事大学的智慧校园:创建基地地图和校园树木监测应用

Revista Ingenierias Universidad de Medellin Pub Date : 2021-03-15 DOI: 10.22395/rium.v20n38a2

Elsa Adriana Cárdenas Quiroga

引用次数: 0

Assessing the Vulnerability of Power Systems Using Multilevel Programming: A Literature Review 利用多层规划评估电力系统的脆弱性:文献综述

Revista Ingenierias Universidad de Medellin Pub Date : 2021-03-15 DOI: 10.22395/rium.v20n38a6

Juan Pablo Hernández Valencia, J. López-Lezama, Bonie Johana Restrepo Cuestas

{"title":"Assessing the Vulnerability of Power Systems Using Multilevel Programming: A Literature Review","authors":"Juan Pablo Hernández Valencia, J. López-Lezama, Bonie Johana Restrepo Cuestas","doi":"10.22395/rium.v20n38a6","DOIUrl":"https://doi.org/10.22395/rium.v20n38a6","url":null,"abstract":"Vulnerability studies can identify critical elements in electric power systems in order to take protective measures against possible scenarios that may result in load shedding, which can be caused by natural events or deliberate attacks. This article is a literature review on the latter kind, i.e., the interdiction problem, which assumes there is a disruptive agent whose objective is to maximize the damage to the system, while the network operator acts as a defensive agent. The non-simultaneous interaction of these two agents creates a multilevel optimization problem, and the literature has reported several interdiction models and solution methods to address it. The main contribution of this paper is presenting the considerations that should be taken into account to analyze, model, and solve the interdiction problem, including the most common solution techniques, applied methodologies, and future studies. This literature review found that most research in this area is focused on the analysis of transmission systems considering linear approximations of the network, and a few interdiction studies use an AC model of the network or directly treat distribution networks from a multilevel standpoint. Future challenges in this field include modeling and incorporating new defense options for the network operator, such as distributed generation, demand response, and the topological reconfiguration of the system.f the system.","PeriodicalId":31131,"journal":{"name":"Revista Ingenierias Universidad de Medellin","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43146292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Extraction of Student Interaction Data from an Open edX Platform 从开放edX平台中提取学生互动数据

Revista Ingenierias Universidad de Medellin Pub Date : 2021-03-15 DOI: 10.22395/rium.v20n38a5

Daniel Jaramillo-Morillo, Mario Solarte, G. Ramírez-González

引用次数: 0

A MOOC for Farmers: Agroclimatic Tools for Crop Protection 面向农民的MOOC:作物保护的农业气候工具

Revista Ingenierias Universidad de Medellin Pub Date : 2021-03-15 DOI: 10.22395/rium.v20n38a8

David Camilo Corrales, Apolinar Figueroa

引用次数: 1

Estimación de los parámetros del modelo de un solo diodo del módulo fotovoltaico aplicando el método de optimización basado en búsqueda de patrones mejorado 应用改进模式搜索优化方法估计光伏组件单二极管模型参数

Revista Ingenierias Universidad de Medellin Pub Date : 2021-03-14 DOI: 10.22395/rium.v20n38a1

A.F. Tobón Mejía, Jhon Jairo Rojas Montano, Sergio Ignacio Serna Garces, J.A. Herrera Cuartas

{"title":"Estimación de los parámetros del modelo de un solo diodo del módulo fotovoltaico aplicando el método de optimización basado en búsqueda de patrones mejorado","authors":"A.F. Tobón Mejía, Jhon Jairo Rojas Montano, Sergio Ignacio Serna Garces, J.A. Herrera Cuartas","doi":"10.22395/rium.v20n38a1","DOIUrl":"https://doi.org/10.22395/rium.v20n38a1","url":null,"abstract":"En este artículo se propone el uso de un algoritmo de optimización basado en la búsqueda de patrones mejorada, aplicándolo a la estimación de los parámetros modelo de un diodo de una célula fotovoltaica. Los parámetros a estimar son corriente fotovoltaica, la saturación de corriente del diodo, la resistencia serie, la resistencia en paralelo y el factor de idealidad del diodo. La estimación es hecha a partir de los datos obtenidos de una curva conocida, es decir, que la celda fotovoltaica puede caracterizarse y los parámetros son extraídos de los datos de la curva. Los resultados son la identificación de los parámetros y la exactitud del modelo con respecto a la referencia en el punto de máxima potencia (MPP). Adicionalmente se realiza una comparación con el modelo obtenido con tres estimaciones realizadas con el algoritmo de optimización enjambre de partículas (PSO), bajo las mismas condiciones en cantidad de partículas y de iteraciones. El error encontrado muestra la similitud del modelo con la referencia obtenida de acuerdo con el algoritmo IPSM.","PeriodicalId":31131,"journal":{"name":"Revista Ingenierias Universidad de Medellin","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45260695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Selection of Online Network Traffic Discriminators for on-the-Fly Traffic Classification 动态流量分类中在线网络流量判别器的选择

Revista Ingenierias Universidad de Medellin Pub Date : 2021-03-08 DOI: 10.22395/rium.v20n38a4

Angela María Vargas Arcila, Juan Carlos Corrales Muñoz, Alvaro Rendon Gallon, A. Sanchis

{"title":"Selection of Online Network Traffic Discriminators for on-the-Fly Traffic Classification","authors":"Angela María Vargas Arcila, Juan Carlos Corrales Muñoz, Alvaro Rendon Gallon, A. Sanchis","doi":"10.22395/rium.v20n38a4","DOIUrl":"https://doi.org/10.22395/rium.v20n38a4","url":null,"abstract":"There are several techniques to select a set of traffic features for traffic classification. However, most studies ignore the domain knowledge where traffic analysis or classification is performed and do not consider the always moving information carried in the networks. This paper describes a selection process of online network-traffic discriminators. We obtained 24 traffic features that can be processed on the fly and propose them as a base attribute set for future domain-aware online analysis, processing, or classification. For the selection of a set of traffic discriminators, and to avoid the inconveniences mentioned, we carried out three steps. The first step is a context knowledge-based manual selection of traffic features that meet the condition of being obtained on the fly from the flow. The second step is focused on the quality analysis of previously selected attributes to ensure the relevance of each one when performing a traffic classification. In the third step, the implementation of several incremental learning algorithms verified the usefulness of such attributes in online traffic classification processes. ","PeriodicalId":31131,"journal":{"name":"Revista Ingenierias Universidad de Medellin","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43330509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0