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Mostrando ítems 1-20 de 1453
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2D CFD Modeling of Rapid Water Filling with Air Valves Using OpenFOAM
(Cartagena de Indias, 2021-11-04)The rapid filling process in pressurized pipelines has been extensively studied using mathematical models. On the other hand, the application of computational fluid dynamics models has emerged during the last decade, which ... -
3-webs with singularities
(Maik Nauka-Interperiodica Publishing, 2016)A 3-web with singularities is an ordered collection of three one-dimensional distributions L1, L2, L3 on a 2-dimensional manifold M. The subset Σ ⊂ M where these distributions are not pairwise transversal is called the ... -
A blockchain solution for operational parameters monitoring platform for DC microgrids
(Cartagena de Indias, 2020-12-01)Large penetration of renewable distributed energy resources, as well as the effective integration of storage systems and electric vehicles, are some of the required strategies to reduce the impact of the energy sector on ... -
A boundary element method formulation for modal analysis of doubly curved thick shallow shells
(Elsevier Inc., 2016)The study of vibrations of shells is an important aspect in the design of thin-walled structures. In general, analytical solutions for the natural frequencies of shells are not possible, and computational techniques are ... -
A broad diversity survey of Rhizoctonia species from the Brazilian Amazon reveals the prevalence of R. solani AG-1 IA on signal grass and the new record of AG-1 IF on cowpea and soybeans
(Cartagena de IndiasCampus Tecnológico, 2020-03-01)Leaf blight, sheath blight, and web blight are major diseases caused by Rhizoctonia species on both Fabaceae and Poaceae plant hosts in the Brazilian Amazon agroecosystem. To determine the diversity of Rhizoctonia species ... -
A case study approach to introduce circular economy in sustainable design education
(Institution of Engineering Designers, The Design Society, 2019)Finding sustainable solutions to worldwide problems has become a critical challenge for engineers. The use of natural resources and the generation of materials now degradable should be controlled when sustainable solutions ... -
A chronological literature review of electric vehicle interactions with power distribution systems
(Campus TecnológicoIngeniería Electrónica, 2020-06-11)In the last decade, the deployment of electric vehicles (EVs) has been largely promoted. This development has increased challenges in the power systems in the context of planning and operation due to the massive amount of ... -
A collaborative EPQ inventory model for a three-echelon supply chain with multiple products considering the effect of marketing effort on demand
(Cartagena de IndiasCampus Tecnológico, 2020-06-01)This paper presents an inventory model for a three-echelon supply chain with multiple products and multiple members considering the demand as an increasing function of the marketing effort. In the proposed inventory model, ... -
A Comparative Study on Power Flow Methods Applied to AC Distribution Networks with Single-Phase Representation
(Cartagena de Indias, 2021-10-21)This paper presents a comparative analysis of six different iterative power flow methods applied to AC distribution networks, which have been recently reported in the scientific literature. These power flow methods are (i) ... -
A Comparative Study on Power Flow Methods for Direct-Current Networks Considering Processing Time and Numerical Convergence Errors
(Cartagena de Indias, 2020-12-03)This study analyzes the numerical convergence and processing time required by several classical and new solution methods proposed in the literature to solve the power-flow problem (PF) in direct-current (DC) networks ... -
A computational model for residual life assessment of dents generated by explosive loads in pipelines
(2003)The present work develops a finite elements computational model that describes the process of dynamic deformation in pipelines under explosive loads. The mechanical response of the material is modeled by means of an ... -
A computer vision system for detecting motorcycle violations in pedestrian zones
(Cartagena de Indias, 2024-05-02)This paper presents a system that relies on computer vision to identify instances of motorcycle violations in crosswalks utilizing CNNs. The system was trained and evaluated on a novel public dataset published by the ... -
A Convex OPF Approximation for DC Networks Considering Voltage-Dependent Load Models
(Cartagena de Indias, 2020-12-01)This paper addresses the problems of power flow and optimal power flow analysis considering voltage-dependent load models from the convex point of view. First, Taylor series expansion method is employed for linearizing the ... -
A convex OPF approximation for selecting the best candidate nodes for optimal location of power sources on DC resistive networks
(Elsevier B.V., 2019)This paper proposes a convex approximation approach for solving the optimal power flow (OPF) problem in direct current (DC) networks with constant power loads by using a sequential quadratic programming approach. A ... -
A Deep Learning Approach To Cloud And Shadow Detection In Multiresolution, Multitemporal And Multisensor Images
(Cartagena de IndiasCiencias Básicas, 2024-07-12)Accurate detection of clouds and shadows present in optical imagery is important in remote sensing for ensuring data quality and reliability. This study introduces a deep learning model capable of generating precise cloud ... -
A density functional theory study of the reconstruction of gold (111) surfaces
(American Chemical Society, 2014)We studied (p × √3) gold (111) surface reconstructions within the DFT/PW91 approximation. Our findings clearly show that the reconstruction is energetically favorable in unreconstructed surfaces equal to or larger than the ... -
A Discrete-Continuous PSO for the Optimal Integration of D-STATCOMs into Electrical Distribution Systems by Considering Annual Power Loss and Investment Costs
(Cartagena de Indias, 2022-07-14)Currently, with the quick increase in global population, the energetic crisis, the environmental problematic, and the development of the power electronic devices generated the need to include new technologies for supporting ... -
A discrete-event simulation model with a collaborative and lean logistic approach application to a dairy industry
(Cartagena de IndiasIngenieríaCampus TecnológicoIngeniería Industrial, 2024-09-11)The research introduces a discrete-event simulation model that focuses on implementing a collaborative and lean logistic approach to enhance productivity and competitiveness within a supply chain. The model aims to improve ... -
A fixed-point current injection power flow for electric distribution systems using Laurent series
(Cartagena de Indias, 2022-07-02)his paper proposes a new power flow (PF) formulation for electrical distribution systems using the current injection method and applying the Laurent series expansion. Two solution algorithms are proposed: a Newtonlike ... -
A flexible and simplified calibration procedure for fringe projection profilometry
(SPIE, 2019)Fringe Projection Profilometry (FPP) is a widely used technique for optical three-dimensional (3D) shape measurement. Among the existing 3D shape measurement techniques, FPP provides a whole-field 3D reconstruction of ...
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.
