Investigaciones: Envíos recientes
Mostrando ítems 981-1000 de 1465
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On the Existence of the Power Flow Solution in DC Grids With CPLs Through a Graph-Based Method
(Cartagena de Indias, 2020-08-27)This brief explores the formulation of the power flow problem in DC grids with a classical incidence matrix through a graph-based formulation. This corresponds to a compact representation of the conventional backward/forward ... -
Numerical methods for power flow analysis in DC networks: State of the art, methods and challenges
(Cartagena de Indias, 2020-12)This study addresses the power-flow-analysis problem for direct-current (DC) grids from a numerical perspective. Classical and emerging algorithms for power flow solutions in DC networks such as Gauss--Seidel, successive ... -
Mathematical modeling of a system composed of parabolic trough solar collectors integrated with a hydraulic energy storage system
(Cartagena de Indias, 2020)In this work we propose to model a 7.5 kWe power generation system, implementing a Parabolic Trough Collector system, coupled to an Organic Rankine Cycle (PTC/ORC) and a bladder-type hydraulic accumulator system. The purpose ... -
Hybrid calibration procedure for fringe projection profilometry based on stereo vision and polynomial fitting
(Cartagena de IndiasIngeniería Mecatrónica, 2020-03-19)The key to accurate 3D shape measurement in fringe projection profilometry (FPP) is the proper calibration of the measurement system. Current calibration techniques rely on phase-coordinate mapping (PCM) or back-projection ... -
Fracture Dynamic Analysis of Cracked Reissner Plates Using the Boundary Element Method
(Cartagena de IndiasIngeniería Mecánica, 2020-05-15)This work presents a Dual Boundary Element Method/Dual Reciprocity Boundary Element Method formulation for the dynamic analysis of fractured shear deformable plates. Equations for the Dual Boundary Element Method, including ... -
Dynamic active and reactive power compensation in distribution networks with batteries: A day-ahead economic dispatch approach
(Cartagena de IndiasCampus TecnológicoIngeniería Eléctrica, 2020-06-08)This paper focuses on the problems of optimal operation of battery energy storage systems (BESSs) in distributed networks from a nonlinear programming (NLP) point of view. This proposal contains the active and reactive ... -
Developing an indicator for material selection based on durability and environmental footprint: A Circular Economy perspective
(Cartagena de IndiasCampus TecnológicoIngeniería Mecánica, 2020-05-19)The Circular Economy comprises several strategies to enhance the sustainability of products. However, most of the research in this area has focused on Recycling, Recovering and final disposal. Strategies for lifespan ... -
Bilinear Control for Three-Phase Microgrids: A Proportional-Integral Passivity-Based Design
(Cartagena de IndiasCampus Tecnológico, 2020-07-30)A bilinear PI control based on passivity theory for the adequate integration of distributed energy resources (DERs) in ac microgrids is presented in this paper. DERs are integrated into the grid by voltage source converters ... -
Analysis of hydraulic transients during pipeline filling processes with air valves in large-scale installations
(Cartagena de IndiasCampus TecnológicoIngeniería Civil, 2020-04-13)During the filling process in pressurized hydraulic systems, sudden pressure changes generated inside the pipes can cause significant damage. To avoid these excessive overpressures, air valves should be installed to allow ... -
An energy management system for optimal operation of BSS in DC distributed generation environments based on a parallel PSO algorithm
(Cartagena de IndiasCampus Tecnológico, 2020-06-16)This paper proposes an energy management system (EMS) for the day-ahead dispatch of battery storage systems (BSS) under a distributed generation environment for direct current (DC) networks, with the main objective 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 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 ... -
Encuentro Matemático del Caribe - Memorias 2019
(Cartagena de IndiasCampus Tecnológico, 2019-10-09)El Encuentro Matemático del Caribe se realizó el 18 y 19 de noviembre de 2019 en la Universidad Tecnológica de Bolívar, en Cartagena de Indias-Colombia, Campus Tecnológico Carlos Vélez Pombo. Con este evento se dio a ... -
Generating density maps for convolutional neural network-based cell counting in specular microscopy images
(Cartagena de Indias, 2020)Accurate endothelial cell density with specular microscopy is essential for correct clinical assessment of the cornea. Commercial specular microscopes incorporate automated cell segmentation methods to estimate cell density. ... -
Maniobras de llenado y vaciado en grandes conducciones. Aplicación a una tubería de fundición DN400 en Massamagrell (Valencia, España)
(Cartagena de IndiasIngeniería Civil, 2020-01-31)Air pockets inside hydraulic installations during filling and emptying processes can generate pressure surges and negative pressure, respectively. Serious damages can be occurred in pipelines. In order to analyse hydraulic ... -
Increasing driving range for electric vehicles at sub-zero temperatures by optimizing a hybrid storage configuration using supercapacitors
(Cartagena de Indias, 2020)One of the main challenges electric vehicles manufacturers face is the perceived limited operational range of cars, commonly referred to as "range anxiety". Furthermore, effective range in these vehicles is affected by ... -
Classification of pluviometric networks located in the region of Bogotá, Colombia using artificial neural networks
(Cartagena de Indias, 2020)This work presents a methodology for the classification of pluviometric networks using artificial neural networks. For this, the network of stations registered in the Corporación Autónoma Regional de Cundinamarca, Colombia, ... -
Causal Analysis of the Pinion Teeth Failure in a Limestone Reclaimer
(Cartagena de Indias, 2020)This paper presents a causal analysis of an unexpected failure of the pinion teeth of a large reducer installed in a limestone reclaimer which is part of a raw material transportation system of a cement factory. The Montano ... -
Automatic recognition of Colombian car license plates using convolutional neural networks and Chars74k database
(Cartagena de Indias, 2020)A methodology for the automatic recognition of Colombian car license plates using convolutional neural networks is proposed. One of the biggest challenges when using onvolutional neural network is the demand for large ... -
Application of the backward/forward sweep method for solving the power flow problem in DC networks with radial structure
(Cartagena de Indias, 2020)This paper presents the application of the backward/forward sweep iterative method for solving the power flow problem in direct current networks with radial structure, considering resistive and constant power loads. The ...
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.
