UIS Ingenierias最新文献

{"title":"Análisis experimental de flujo líquido-líquido en un tubo horizontal usando redes neuronales artificiales","authors":"Andrey Felipe Casas-Pulido, M. M. Hernández-Cely, Oscar Mauricio Rodríguez-Hernández","doi":"10.18273/revuin.v22n1-2023005","DOIUrl":"https://doi.org/10.18273/revuin.v22n1-2023005","url":null,"abstract":"El objetivo de este trabajo es la aplicación de una red neuronal artificial para la predicción de la fracción volumétrica (holdup) de flujo bifásico (aceite-agua) en un tubo en posición horizontal. Para este fin, la velocidad superficial del agua y el aceite se utilizaron como parámetros de entrada, entre tanto, la fracción volumétrica de estos dos fluidos se utilizaron como parámetros de salida para el entrenamiento y prueba de la red neuronal multicapa, el método utilizado fue retro propagación. Los datos experimentales (92 datos) se tomaron en el LEMI-EESC-USP y fueron utilizados para desarrollar el modelo de red neuronal artificial. Finalmente, se concluyó que los datos experimentales utilizados en la red neuronal se ajustan muy bien para una función de transferencia tagsig con 10 neuronas en la capa oculta evaluadas a partir del error porcentual absoluto medio de (AAPE= 3,95) y coeficiente de determinación ( = 0,975).","PeriodicalId":42183,"journal":{"name":"UIS Ingenierias","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47632250","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}

{"title":"Influencia de las bacterias en la autocuración del concreto","authors":"S. Muñoz-Pérez, Jorge Carlos-Sánchez, Miguel Peralta-Sánchez","doi":"10.18273/revuin.v22n1-2023007","DOIUrl":"https://doi.org/10.18273/revuin.v22n1-2023007","url":null,"abstract":"El presente documento contempla una reflexión crítica de los avances tecnológicos en ensayos biológicos y químicos que es sometido el concreto mediante la incorporación de bacterias, con el objetivo de conocer los distintos elementos microbianos que poseen propiedades de biomineralización capaces de realizar la autocuración en el concreto, asimismo, se revisaron métodos y aplicaciones de las bacterias en el concreto con el fin de mejorar sus propiedades mecánicas a las diferentes exigencias sometidas las estructuras modernas, y al mismo tiempo contribuir con la reducción de gases dañinos al medio ambiente. En el desarrollo de este manuscrito se revisaron 80 artículos indexados entre los años 2017 al 2021 distribuidos de la siguiente manera, 51 en Scopus, 17 en Ebsco, y 12 en SciencieDirect, señalando y describiendo que el concreto microbiano tiene un enfoque prometedor en un futuro cercano. Los resultados alcanzados con la incorporación de las diferentes bacterias de Bacillus, como son Bacillus subtillis, B, cohnii, B. pasteurii, B. pseudofirmus, B. megaterium entre otros, en diferentes concentraciones de células/ml., mostraron gran efectividad en la cicatrización de grietas, aumentando también la resistencia a la compresión, flexión y tracción en el concreto. Sobre la base de la revisión literaria se concluye que la precipitación microbiana de carbonato de calcio mediante ureólisis en la matriz del concreto, mitiga el agrietamiento, mejora la resistencia, aumenta la durabilidad y, por lo tanto, disminuye los costes en reparación de las estructuras.","PeriodicalId":42183,"journal":{"name":"UIS Ingenierias","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45998510","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}

{"title":"Heat flow and specific heat capacity in the dehydration stage of biomasses pyrolysis through thermal analyses","authors":"Fernanda Rezende-Lopes, K. Tannous, Thiago Rezende-Lopes","doi":"10.18273/revuin.v22n1-2023006","DOIUrl":"https://doi.org/10.18273/revuin.v22n1-2023006","url":null,"abstract":"This study aims to investigate the influence of the moisture of energy cane and coconut fiber on heat flow and specific heat capacity in the dehydration stage from the pyrolysis process. The experiments were carried out in a simultaneous thermogravimetry and differential scanning calorimetry analyzer using a heating rate of 20 K/min in an inert atmosphereThree decomposition stages were identified: dehydration (marked by an expressive endothermic peak), pyrolysis, and carbonization). From the analyses of the water contributions, it was observed that the heat flow from the heat capacity of remaining water (Qwc) is negligible compared to the heat flow from the water evaporation (Qwe), for both biomasses. Also, we calculated the heat flow from the heat capacity (Qb) and the experimental specific heat capacity (cp,b) of biomasses such as 686-2371 J/kg K and 1076-2113 J/kg K, respectively. Then, for the dehydration stage, third- and fourth-order theoretical polynomial equations have been proposed to predict the heat required for the biomass heating.","PeriodicalId":42183,"journal":{"name":"UIS Ingenierias","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45149693","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}

{"title":"Determinación del valor agregado sostenible de los procesos en la cadena de suministro","authors":"Andrey Vinajera-Zamora, Roberto Cespón-Castro, Fernando Marrero-Delgado","doi":"10.18273/revuin.v22n1-2023004","DOIUrl":"https://doi.org/10.18273/revuin.v22n1-2023004","url":null,"abstract":"El presente artículo propone una metodología para calcular el valor agregado sostenible de los procesos (SVA) que forman una cadena de suministro (CS), mediante un indicador integral. Consta de seis pasos y utiliza como métodos el Análisis del Ciclo de Vida y los métodos de Diakoulaki y Saaty, basados en múltiples criterios. Al aplicarse a una CS de productos electromecánicos, se logró obtener el SVA de cada proceso y con ello el valor que cada uno aporta a las dimensiones económica y ambiental de la sostenibilidad. Estos resultados, demuestran la novedad y factibilidad de aplicación de la metodología desarrollada y sus diferencias con otras existentes en la literatura especializada.","PeriodicalId":42183,"journal":{"name":"UIS Ingenierias","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43034787","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}

{"title":"Toluene hydrogenation and ring-opening on bimetallic Pd-Pt/HY catalysts","authors":"T. Romero, L. Melo, María Esparragoza, Rosarmy Ávila, A. Moronta, G. Carruyo, L. García, C. Donoso, Laura Sáenz, Carlos Yugcha-Pilamunga","doi":"10.18273/revuin.v22n1-2023003","DOIUrl":"https://doi.org/10.18273/revuin.v22n1-2023003","url":null,"abstract":"Bimetallic Pd-Pt/HY catalysts prepared by the co-impregnation method with an atomic variation of Pd/Pd+Pt were studied to convert toluene and methylcyclohexane. The catalysts were characterized by the BET method, chemisorption of CO by the pulse method, programmed temperature reduction (H2-TPR), and programmed ammonia thermo-desorption (NH3TPD). Results of chemisorption of CO and H2-TPR for Pd-Pt/HY catalysts suggest the existence of a strong interaction between Pd and Pt. The NH3-TPD showed that incorporating metals influences the percentage of relative distribution of weak/strong acid sites presented in decreasing order of acidity: Pd0Pt100/HY>Pd100Pt0/HY>Pd33Pt67/HY. Atomic composition Pd/Pd+Pt equal to 0.33, and relative distribution of weak/strong acid sites equal to 2, favor hydrogenation of toluene to methylcyclohexane in metal sites and subsequent skeletal isomerization in the acidic sites through dimethylcyclopentane intermediate and ring-opening in the metal sites, leading to increased formation of n-heptane relative to iso-heptane. Bimetallic Pd-Pt/HY catalysts prepared by the co-impregnation method with an atomic variation of Pd/Pd+Pt were studied to convert toluene and methylcyclohexane. The catalysts were characterized by the BET method, chemisorption of CO by the pulse method, programmed temperature reduction (H2-TPR), and programmed ammonia thermo-desorption (NH3TPD). Results of chemisorption of CO and H2-TPR for Pd-Pt/HY catalysts suggest the existence of a strong interaction between Pd and Pt. The NH3-TPD showed that incorporating metals influences the percentage of relative distribution of weak/strong acid sites presented in decreasing order of acidity: Pd0Pt100/HY>Pd100Pt0/HY>Pd33Pt67/HY. Atomic composition Pd/Pd+Pt equal to 0.33, and relative distribution of weak/strong acid sites equal to 2, favor hydrogenation of toluene to methylcyclohexane in metal sites and subsequent skeletal isomerization in the acidic sites through dimethylcyclopentane intermediate and ring-opening in the metal sites, leading to increased formation of n-heptane relative to iso-heptane.","PeriodicalId":42183,"journal":{"name":"UIS Ingenierias","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41583013","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}

{"title":"Pattern recognition for the modification of characteristics using non-linear techniques","authors":"F. Mesa, R. Ospina-Ospina, D. M. Devia-Narvaez","doi":"10.18273/revuin.v22n1-2023002","DOIUrl":"https://doi.org/10.18273/revuin.v22n1-2023002","url":null,"abstract":"Traditional data processing applications are unsuitable for handling large amounts of data. To achieve an efficient manipulation and extraction of characteristics or samples that the information represents, it is necessary to know aspects such as data collection and treatment. In this document, a database corresponding to the behavior of electrical energy consumption in a residential load was refined. The debugging and statistical analysis of the samples were carried out using the principal component analysis. The training of the smallest data set to the original database was made using vector support machine techniques and artificial neural networks. Finally, a proposal is presented for the analysis of samples that are within the operating limits or not using updating dynamic patterns for the unsupervised validation of new samples.","PeriodicalId":42183,"journal":{"name":"UIS Ingenierias","volume":"1 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41461661","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}

{"title":"Methodology for the structural analysis of a main deck of FPSO vessel supporting an offshore crane","authors":"D. F. Hernández-Ménez, I. Félix-González, J. Hernández-Hernández, A. Herrera-May","doi":"10.18273/revuin.v22n1-2023001","DOIUrl":"https://doi.org/10.18273/revuin.v22n1-2023001","url":null,"abstract":"Offshore cranes placed on the surface of Floating Production Storage and Offloading (FPSO) vessels affect the structural response of their main decks, which can alter the safe operation of the FPSO vessels. Generally, classification societies rules are used to predict the structural strength of the main deck of FPSO vessels. However, these classification societies rules are limited to estimate the variation of the structural performance of the main deck caused by the operation of offshore cranes under different hydrodynamic conditions. Here, we present a methodology to determine the alteration of the structural behavior of a main deck of FPSO vessel due to different operation conditions of a board offshore crane. This methodology considers the hydrodynamic response for two ultimate limit states: operating and storm conditions from 1000 m water depth in Gulf of Mexico with a return period of 10 and 100 years, respectively. The methodology includes finite element method (FEM) models of the main deck supporting an offshore crane to predict its structural response. The maximum von Mises stress of the main deck does not overcome its maximum permissible stress, which allows a safe operation of the FPSO crane. The proposed methodology can be used to estimate the structural behavior of main decks of FPSO vessels that are modified for supporting offshore cranes, regarding the hydrodynamic response for each FPSO under the operation and extreme conditions in its location. Thus, naval designers could select the better structural modifications of the main decks that decrease their costs of construction and maintenance.","PeriodicalId":42183,"journal":{"name":"UIS Ingenierias","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48241866","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}

{"title":"Deposición de láser pulsado de hidroxiapatita en Ti-6Al-4V producido por manufactura aditiva","authors":"Estefanía Corredor, O. A. González-Estrada, Rogelio Ospina-Ospina","doi":"10.18273/revuin.v21n4-2022010","DOIUrl":"https://doi.org/10.18273/revuin.v21n4-2022010","url":null,"abstract":"En este trabajo, se estudiaron las propiedades mecánicas, composición química y la morfología superficial de recubrimientos de hidroxiapatita, depositados mediante deposición por láser pulsado sobre sustratos de Ti6Al4V fabricados por electron beam melting, variando la energía de deposición. Los ensayos de microindentación e indentación realizados de acuerdo con la norma ASTM E384-17, permitieron obtener valores de dureza y microdureza promedios. Para la evaluación de las propiedades del recubrimiento del sustrato se empleó microscopia electrónica de barrido, obteniendo así valores promedio de tamaño de formación de partículas de hidroxiapatita del recubrimiento. La composición química se obtuvo del análisis por espectroscopia de rayos X por energía dispersiva. Se evaluaron características importantes que indican la incidencia de los parámetros de deposición con respecto a las propiedades mecánicas, morfológicas y composición química del recubrimiento biocompatible sobre partes producidas mediante manufactura aditiva para su uso en implantes óseos.","PeriodicalId":42183,"journal":{"name":"UIS Ingenierias","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46692140","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}

{"title":"Estimación de la producción de lodos en plantas convencionales de tratamiento de agua potable mediante modelos de predicción","authors":"P. Torres-Lozada, Luis Ancizar Arango-Vallejo, Wilmar Alexander Torres-López","doi":"10.18273/revuin.v21n4-2022008","DOIUrl":"https://doi.org/10.18273/revuin.v21n4-2022008","url":null,"abstract":"El tratamiento de agua para consumo humano en plantas de tratamiento de agua potable (PTAP) convencionales, genera lodos que se retienen principalmente en la etapa de sedimentación y para hacer un manejo adecuado es importante conocer las cantidades producidas. Para aportar a este fin, en este estudio se evaluaron diferentes modelos empíricos (AFEE, Cornwell & Koppers, Coşkun, CETESB, AWWA y Kawamura) y estocásticos (ARIMA) para la predicción de la producción de lodos de una PTAP convencional que utiliza sulfato de aluminio como coagulante. Entre los modelos empíricos, los tres primeros presentaron un mejor ajuste frente a los datos observados; sin embargo, el estocástico ARIMA (0,1,2) fue el de mejor predicción con una diferencia de 1.51% entre el valor pronosticado y el observado (2173,65 ± 549 vs 2207 Kg / día de lodos en base seca), lo que demuestra su aplicabilidad para estimar la producción de lodos.","PeriodicalId":42183,"journal":{"name":"UIS Ingenierias","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48137956","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}

{"title":"Analysis of formability of AISI 304 steel sheets with different thicknesses by the tensile properties","authors":"Jhon Barbosa-Jaimes, I. García-Páez, Victoriano García-Medina","doi":"10.18273/revuin.v21n4-2022009","DOIUrl":"https://doi.org/10.18273/revuin.v21n4-2022009","url":null,"abstract":"Although AISI 304 steel is widely used and its manufacturers provide resistance data in the quality certificate, these are not sufficient to characterize and predict the behavior of the sheets in the drawing and drawing processes. This is why the objective of this work was to analyze the formability of AISI 304 steel sheets with 16- (thickness 1.5 mm), 18- (1.2 mm), and 20- (0.9 mm) gauges used by the metalworking industry in Colombia by determining intrinsic properties related to the ability of the sheet to withstand stretching and drawing operations such as the strain hardening exponent n, the normal anisotropy rm, and the planar anisotropy Δr. The methodology consisted of analyzing the chemical composition, a metallographic study, and a series of tensile tests. The results show that the steel has a microstructure of twinned austenite grains of size between 15-30 mm. Regarding the mechanical resistance, it was observed that all the mean values of ultimate resistance, elastic limit, and elongation are above the minimum established in the standard. Furthermore, all of the tensile test results changed according to the variation of angles concerning the rolling direction (0°, 45°, and 90°), which indicates the anisotropic character of the sheet. The most relevant result allows us to infer that the 20-gauge sheet has better formability and therefore, better behavior against the stretching and drawing processes.","PeriodicalId":42183,"journal":{"name":"UIS Ingenierias","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41676399","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}