Productos de investigación: Envíos recientes

Mostrando ítems 1281-1300 de 1398

    • Influence of Arduino on the Development of Advanced Microcontrollers Courses 

      Martínez-Santos J.C.; Acevedo Patiño, Óscar; Contreras Ortiz, Sonia Helena (Education Society of IEEE (Spanish Chapter), 2017)
      This paper describes the development of courses in the field of digital design that use Arduino boards as their main platforms. Arduino offers an intuitive development environment and multiple hardware and software resources ...

    • A parametric sensitivity analysis of numerically modelled piston-type filling and emptying of an inclined pipeline with an air valve 

      Coronado Hernández, Óscar Enrique; Fuertes Miquel, Vicente S.; Besharat M.; Ramos H.M. (BHR Group Limited, 2018)
      Filling and emptying operations should be planned by engineers in operational stages to prevent a system failure depending on reaching extreme low pressure values. In this sense, a compression of an air pocket produces ...

    • CFD and 1D simulation of transient flow effect on air vessel 

      Besharat M.; Coronado Hernández, Óscar Enrique; Fuertes Miquel, Vicente S.; Viseu M.T.; Ramos H.M. (BHR Group Limited, 2018)
      The estimation of unsteady parameters in two-phase condition is crucial for the safety and reliability of the hydraulic systems. There are plenty of one-dimensional (1D) simulation tools for unsteady flow estimation being ...

    • An automatic approach to generate corpus in Spanish 

      Puertas E.; Alvarado‑Valencia, Jorge Andres; Moreno-Sandoval L.G.; Pomares-Quimbaya A. (Springer Verlag, 2018)
      A corpus is an indispensable linguistic resource for any application of natural language processing. Some corpora have been created manually or semi-automatically for a specific domain. In this paper, we present an automatic ...

    • Power Flow Analysis in DC Grids: Two Alternative Numerical Methods 

      Montoya O.D.; Garrido Arévalo, Víctor Manuel; Gil-González, Walter; Grisales-Noreña L.F. (Institute of Electrical and Electronics Engineers Inc., 2019)
      This express brief proposes two new iterative approaches for solving the power flow problem in direct current networks as efficient alternatives to the classical Gauss-Seidel and Newton-Raphson methods. The first approach ...

    • Distributed energy resources integration in single-phase microgrids: An application of IDA-PBC and PI-PBC approaches 

      Montoya O.D.; Gil-González W.; Garces A. (Elsevier Ltd, 2019)
      This paper presents a unified Hamiltonian formulation for controlling distributed energy resources (DERs)in ac single-phase microgrids (SP-MGs)via proportional-integral passivity-based control (PI-PBC), and interconnection ...

    • Optimization of a drive shaft using PSO algorithm 

      Rodriguez-Cabal M.A.; Marín J.A.; Grisales-Noreña L.F.; Montoya O.D.; Del Rio J.A.S. (World Scientific and Engineering Academy and Society, 2018)
      Mechanical design involves several continuous variables associated with the calculation of elements that compose the parts implemented in different processes. However, when the values associated with several design variables ...

    • Optimal Location of Protective Devices Using Multi-objective Approach 

      Montoya O.D.; Hincapie R.A.; Granada M. (Springer Verlag, 2018)
      In this paper a multi-objective model for the problem of optimal location of reclosers and fuses in power electric distribution systems is presented, considering the possibility of fuse rescue through the coordinated ...

    • Evaluating the influence of camera and projector lens distortion in 3D reconstruction quality for fringe projection profilometry 

      Vargas R.; Marrugo A.G.; Pineda J.; Meneses J.; Romero L.A. (OSA - The Optical Society, 2018)
      We study the influence of geometric distortions of the camera and projector lenses on 3D reconstruction quality for fringe projection profilometry. Experimental results on real objects and their 3D models show the accuracy ...

    • Failures Monitoring in Refrigeration Equipment 

      Ballestas Ortega O.J.; Villa Ramírez, José Luis (Springer Verlag, 2018)
      The refrigerators are the responsible to assure the temperature and humidity conditions for perishable products stored in it. In this sense, it is necessary to guarantee its good performance at all times in order to preserve ...

    • Hierarchical agglomerative clustering of time-warped series 

      Kotas, Marian; Leski J.; Moroń T.; Guzmán J.G. (Springer Verlag, 2018)
      We have developed a procedure for hierarchical agglomerative clustering of time series data. To measure the dissimilarity between these data, we use classically the Euclidean distance or we apply the costs of the series ...

    • Microscopic shape from focus using white light interferometric fringes 

      Altamar Mercado, Hernando; Patiño Vanegas, Alberto; Marrugo A.G. (OSA - The Optical Society, 2018)
      In this work we study the use of a focus measure to improve the 3D reconstruction of low reflectivity microscopic samples using white light interference microscopy. Simulation and experimental results show the improved ...

    • Avoidable and unavoidable exergetic destruction analysis of a nitric acid production plant 

      Fajardo Cuadro, Juan Gabriel; Valle H.; Buelvas A. (American Society of Mechanical Engineers (ASME), 2018)
      Exergy analysis for Nitric acid production plants are very few and many are outdated. This study aims to support existing scientific studies and incite new investigations of exergy analysis in modern times. An advanced ...

    • Object-oriented mathematical modeling for estimating electric vehicle’s range using modelica 

      Domínguez Jiménez, Juan Antonio; Campillo Jiménez, Javier Eduardo (Springer Verlag, 2018)
      Electric vehicles (EVs) offer a great alternative for decarbonizing the transport sector. However, insufficient recharging infrastructure and limited range increase the driver’s ‘range anxiety’. Furthermore, the autonomy ...

    • HoloEasy, a web application for computer generated holograms 

      Patiño Vanegas, Alberto; Diaz-Pacheco L.L.; Patiño-Vanegas J.J.; Martínez-Santos J.C. (Springer Verlag, 2018)
      If the appropriate phase and/or amplitude profile is placed on a Diffractive Optical Element (DOE) it can practically generate an image of an object (hologram) by diffraction of the light. The problem of generating computer ...

    • Mathematical model for assigning an optimal frequency of buses in an integrated transport system 

      Quintero J.S.M.; Martínez Santos J.C. (Springer Verlag, 2018)
      This paper proposes a mathematical model to estimate the frequency setting of the buses for a specific route on any given hour in public transportation systems. This model can be used for three different purposes: determine ...

    • A structure-from-motion pipeline for topographic reconstructions using unmanned aerial vehicles and open source software 

      Meza J.; Marrugo A.G.; Sierra E.; Guerrero M.; Meneses J.; Romero L.A. (Springer Verlag, 2018)
      In recent years, the generation of accurate topographic reconstructions has found applications ranging from geomorphic sciences to remote sensing and urban planning, among others. The production of high resolution, ...

    • A particle swarm optimization approach to log-gabor filtering in fourier transform profilometry 

      Pineda J.; Meza J.; Marrugo A.G.; Vargas R.; Romero L.A. (OSA - The Optical Society, 2018)
      In this work, we propose a particle Swarm Optimization approach to Log-Gabor filtering in Fourier transform profilometry. Encouraging experimental results show the advantage of the proposed method. © 2018 The Author(s)

    • Parental competences and child resilience in the context of displacement in Colombia 

      De La Ossa E.M.D.; Pérez D.F.; Prado A.L.R. (Fundacion para la Investigacion Social Avanzada, 2018)
      This paper presents results of a research that arose from the interest of studying the phenomenon of forced displacement as an adversity, which can be overcome because human beings have the competences to mitigate psychosocial ...

    • Optimization of convective drying assisted by ultrasound for Mango Tommy (Mangifera indica L.) 

      Méndez-Calderón E.K.; Ocampo-Castaño J.C.; Orrego C.E. (Blackwell Publishing Inc., 2018)
      Convective drying is a conventional method to prolong the shelf-life of foods that could negatively affect the product quality due to the long exposure time to high temperature. Ultrasound (US) has been used for reducing ...

      Universidad Tecnológica de Bolívar - 2017 Institución de Educación Superior sujeta a inspección y vigilancia por el Ministerio de Educación Nacional. Resolución No 961 del 26 de octubre de 1970 a través de la cual la Gobernación de Bolívar otorga la Personería Jurídica a la Universidad Tecnológica de Bolívar.