Listar Productos de investigación por título
Mostrando ítems 132-151 de 1394
-
An Energy Management System for PV Sources in Standalone and Connected DC Networks Considering Economic, Technical, and Environmental Indices
(Cartagena de Indias, 2022)This research proposes an efficient energy management system for standalone and grid-connected direct current (DC) distribution networks that consider photovoltaic (PV) generation sources. A complete nonlinear programming ... -
An EPQ inventory model considering an imperfect production system with probabilistic demand and collaborative approach
(Emerald Group Publishing Ltd., 2019)Purpose: The purpose of this paper is to propose an economic production quantity (EPQ) inventory model considering imperfect items and probabilistic demand for a two-echelon supply chain. The production process is imperfect ... -
An Exact Feedback Linearization Control of a SMES System to Support Power in Electrical Grids
(Institute of Electrical and Electronics Engineers Inc., 2018)This paper presents an exact feedback linearization control strategy to operate superconducting magnetic energy storage (SMES) systems connected to an electric distribution network through a pulse-width-modulated current ... -
An exact MINLP model for optimal location and sizing of DGs in distribution networks: A general algebraic modeling system approach
(Ain Shams University, 2019)This paper addresses the classical problem of optimal location and sizing of distributed generators (DGs) in radial distribution networks by presenting a mixed-integer nonlinear programming (MINLP) model. To solve such ... -
An experimental study on deformation analysis of an indented pipe via fringe projection profilometry and digital image correlation
(OSA - The Optical Society, 2018)We studied the surface displacement of a steel pipe during indentation via Fringe Projection Profilometry and 2D-Digital Image Correlation. Experimental results show that a 3D strain approximation is possible for comparison ... -
An IDA-PBC Design with Integral Action for Output Voltage Regulation in an Interleaved Boost Converter for DC Microgrid Applications
(Cartagena de Indias, 2021-12-29)This paper describes the output voltage regulation control for an interleaved connected to a direct current (DC) microgrid considering bidirectional current flows. The proposed controller is based on an interconnection ... -
An Implicit Formulation for Calculating Final Conditions in Drainage Maneuvers in Pressurized Water Installations
(Cartagena de Indias, 2022)Emptying processes are typical maneuvers that should be performed by water distribution companies for operation purposes. These processes involve a complex numerical analysis, since a set of algebraic and ordinary differential ... -
An improved crow search algorithm applied to the phase swapping problem in asymmetric distribution systems
(Cartagena de Indias, 2021-07-23)This paper discusses the power loss minimization problem in asymmetric distribution systems (ADS) based on phase swapping. This problem is presented using a mixed-integer nonlinear programming model, which is resolved by ... -
An Infinite Family of Magnetized Morgan-Morgan Relativistic Thin Disks
(2012)Applying the Horský-Mitskievitch conjecture to the empty space solutions of Morgan and Morgan due to the gravitational field of a finite disk, we have obtained the corresponding solutions of the Einstein-Maxwell equations. ... -
An infinite family of relativistic magnetized finite thin disks
(Institute of Physics Publishing, 2011)An infinite family of relativistic finite thin disk model with magnetic field is presented. The model is obtained for solving the Einstein-Maxwell equations for static spacetimes by means of the Horsk-Mitskievitch generating ... -
An inventory model of three-layer supply chain of wood and furniture industry in the Caribbean region of Colombia
(Taylor and Francis, 2018)This article deals with a mathematical model for multi-item inventory system under a collaborative scheme in a three-level supply chain consisting of multiple raw material suppliers, multiple manufacturers and multiple ... -
An IoT Camera System for the Collection of Data Using QR Code as Object Recognition Algorithm
(Institute of Electrical and Electronics Engineers Inc., 2018)This paper proposes an Internet Of Things (IoT) implementation for recognition of objects using videos to store data about specific objects on internet. This IoT implementation is based on a recognition algorithm for objects ... -
An mi-sdp model for optimal location and sizing of distributed generators in dc grids that guarantees the global optimum
(Cartagena de Indias, 2020-10-30)This paper deals with a classical problem in power system analysis regarding the optimal location and sizing of distributed generators (DGs) in direct current (DC) distribution networks using the mathematical optimization. ... -
An omnidirectional wrappable compact patch antenna for wireless endoscope applications
(2012)An inductively loaded compact patch antenna for a radiation frequency of 433 MHz is designed taking into consideration a human-body model and fabricated on a flexible liquid crystalline polymer (LCP) substrate, which is ... -
An optimization algorithm for the multi-objective flexible fuzzy job shop environment with partial flexibility based on adaptive teaching–learning considering fuzzy processing times
(Cartagena de Indias, 2023)Production scheduling is a critical factor to enhancing productivity in manufacturing engineering and combinatorial optimization research. The complexity and dynamic nature of production systems necessitates innovative ... -
An optimization model for routing—location of vehicles with time windows and cross-docking structures in a sustainable supply chain of perishable foods
(Cartagena de Indias, 2023)The effective distribution of perishable food items is a critical aspect of managing the food industry's supply chain, given their physical–chemical, biological characteristics and composition, which make them highly ... -
Analysing a license plate-based vehicle restriction policy with optional exemption charge: The case in Cali, Colombia
(Cartagena de Indias, 2023)Several cities have restricted the use of private vehicles based on the last digit of a vehicle's license plate to reduce traffic congestion and pollution. However, the effectiveness of this measure has been questioned. ... -
Analysis and Classification of Evoked Potentials in Response to Familiar and Unfamiliar Faces
(Institute of Electrical and Electronics Engineers Inc., 2018)Brain activity during perception and recognition of faces have been studied by researchers with the purpose to develop brain-computer interfaces and to study neurological disorders. In this paper, we analyzed evoked ... -
Analysis and classification of lung and muscular tissues in ultrasound images using 2D wavelet transform and machine learning
(Cartagena de Indias, 2020-11-03)Ultrasound has been considered a safe and accurate alternative to radiography and computerized tomography to diagnose lung diseases such as pneumonia. However, speckle noise, artifacts or certain conditions can difficult ... -
Analysis and classification of lung tissue in ultrasound images for pneumonia detection
(Cartagena de Indias, 2020-01-03)Pneumonia is an infection of the lungs caused by virus, bacteria or fungi. It affects mainly children under five and can be life-threatening. Diagnosis of pneumonia is usually performed using imaging techniques such as ...
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.