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Mostrando ítems 137-156 de 1405
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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 ... -
Analysis in circular economy research in Latin America: A bibliometric review
(Cartagena de IndiasCampus TecnológicoIngeniería Industrial, 2023-09-09)Circular Economy (CE) plays a crucial role in Latin America, where the transition to new economic development models poses significant challenges. This study conducts a bibliometric analysis of CE research in the region ... -
Analysis of Alternatives for the Selection of Offshore Production Platforms. Application in the Colombian Caribbean [Análisis de alternativas para la selección de plataformas de producción offshore. Aplicación en el Caribe Colombiano]
(Cartagena de Indias, 2021)The development of this article consists of the application of an analysis sequence which consists of four criteria that can be considered when developing an offshore oil field. First, a detailed study is made of the ... -
Analysis of company operational performance using an entrepreneurial orientation measurement scale
(Cartagena de IndiasCampus TecnológicoAdministración de Empresas, 2023-10-17)The purpose of this research is to explore the relationship between entrepreneurial orientation (EO) and performance in Colombian companies. Previous research has shown that the dimensions of EO are positively related to ... -
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 ... -
Analysis of Power Losses in Electric Distribution System Using a MATLAB-Based Graphical User Interface (GUI)
(Springer, 2019)This paper describes a graphical user interface (GUI) developed in MATLAB that provides a user-friendly environment for analyzing the power loss behavior in distribution networks with radial configurations. This GUI allows ...
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.