Investigaciones: Envíos recientes
Mostrando ítems 781-800 de 1465
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Heuristic Methodology for Planning AC Rural Medium-Voltage Distribution Grids
(Cartagena de Indias, 2021-08-20)The optimal expansion of AC medium-voltage distribution grids for rural applications is addressed in this study from a heuristic perspective. The optimal routes of a distribution feeder are selected by applying the concept ... -
Voltage regulation of an isolated DC microgrid with a constant power load: a passivity-based control design
(Cartagena de Indias, 2021-08-28)Passivity-based nonlinear control for an isolated microgrid system is proposed in this paper. The microgrid consists of a photovoltaic array and a battery energy storage connected to a point of common converters, supplying ... -
Analysis of sub-atmospheric pressures during emptying of an Irregular pipeline without an air valve using a 2D CFD model
(Cartagena de Indias, 2021-09-15)Studying sub-atmospheric pressure patterns in emptying pipeline systems is crucial because these processes could cause collapses depending on the installation conditions (the underground pipe covering height, type, fill, ... -
Modos de aprendizaje en los contextos actuales para mejorar el proceso de enseñanza
(Cartagena de Indias, 2021-09-24)Learning is a subject of constant concern for all those dedicated to this activity, where there are different paradigmatic approaches. The objective of this work is to assess the different types of learning associated with ... -
La enseñanza de la creatividad en alumnos de psicología de la Universidad Tecnológica de Bolívar (Cartagena, Colombia)
(Cartagena de Indias, 2021-03-10)Se presenta en el siguiente trabajo la experiencia pedagógica del programa de psicología de la Universidad Tecnológica de Bolívar (UTB), una universidad privada de Colombia (Cartagena de Indias) sobre cómo este programa ... -
Conventional and advanced exergoeconomic indicators of a nitric acid production plant concerning the cooling temperature in compression Train’s intermediate stages
(Cartagena de Indias, 2021-07-30)In the refining and petrochemical industrial sector, large amounts of energy are used, so using the concept of exergy allows a rational use of this resource. In the different exergy and exergoeconomics studies applied in ... -
Sensorless Adaptive Voltage Control for Classical DC-DC Converters Feeding Unknown Loads: A Generalized PI Passivity-Based Approach
(Cartagena de Indias, 2021-09-24)The problem of voltage regulation in unknown constant resistive loads is addressed in this paper from the nonlinear control point of view for second-order DC-DC converters. The converters’ topologies analyzed are: (i) buck ... -
On the Optimal Selection and Integration of Batteries in DC Grids through a Mixed-Integer Quadratic Convex Formulation
(Cartagena de Indias, 2021-09-24)This paper deals with the problem of the optimal selection and location of batteries in DC distribution grids by proposing a new mixed-integer convex model. The exact mixed-integer nonlinear model is transformed into a ... -
Black-Hole Optimization Applied to the Parametric Estimation in Distribution Transformers Considering Voltage and Current Measures
(Cartagena de Indias, 2021-10-09)The problem of parametric estimation in single-phase transformers is addressed in this research from the point of view of metaheuristic optimization. The parameters of interest are the series resistance and reactance as ... -
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) ... -
Contribution of CFRP to the shear strength of retrofitted lightly-reinforced concrete panels
(Cartagena de Indias, 2021-07-12)Low-rise buildings with thin Reinforced Concrete (RC) walls that do not comply with the minimum web shear reinforcement prescribed by current earthquake-resistant codes can be found in some Latin American countries. Previous ... -
III Encuentro Matemático del Caribe - Memorias 2021
(Cartagena de IndiasCampus Tecnológico, 2021-12-13)El Encuentro Matemático del Caribe tiene como finalidad reflexionar sobre el quehacer matemático y la enseñanza de las Matemáticas en el Caribe colombiano. Así mismo, extender las redes académicas con investigadores ... -
Optimal Placement and sizing of D-STATCOM in radial and meshed distribution networks using a discrete-continuous version of the genetic algorithm
(Cartagena de Indias, 2021-06-02)In this paper, we propose a new discrete-continuous codification of the Chu–Beasley genetic algorithm to address the optimal placement and sizing problem of the distribution static compensators (D-STATCOM) in electrical ... -
Improved genetic algorithm for phase-balancing in three-phase distribution networks: A master-slave optimization approach
(Cartagena de Indias, 2021-05-14)This paper addresses the phase-balancing problem in three-phase power grids with the radial configuration from the perspective of master–slave optimization. The master stage corresponds to an improved version of the Chu ... -
Reduction of annual operational costs in power systems through the optimal siting and sizing of STATCOMs
(Cartagena de Indias, 2021-04-17)The problem of the optimal siting and placement of static compensates (STATCOMs) in power systems is addressed in this paper from an exact mathematical optimization point of view. A mixed-integer nonlinear programming ... -
Optimal integration of photovoltaic sources in distribution networks for daily energy losses minimization using the vortex search algorithm
(Cartagena de Indias, 2021-04-20)This paper deals with the optimal siting and sizing problem of photovoltaic (PV) generators in electrical distribution networks considering daily load and generation profiles. It proposes the discrete-continuous version ... -
LQR-Based adaptive virtual inertia for grid integration of wind energy conversion system based on synchronverter model
(Cartagena de Indias, 2021-03-06)This paper proposes adaptive virtual inertia for the synchronverter model implemented in a wind turbine generator system integrated into the grid through a back-to-back converter. A linear dynamic system is developed for ... -
Estimation of PQ distance dispersion for atrial fibrillation detection
(Cartagena de Indias, 2021-05-03)Background and objective: Atrial fibrillation (AF) is the most common cardiac arrhythmia in the world. It is associated with significantly increased morbidity and mortality. Diagnosis of the disease can be based on the ... -
A sustainability maturity model for micro, small and medium-sized enterprises (MSMEs) based on a data analytics evaluation approach
(Cartagena de Indias, 2021-05-28)A maturity model for micro, small and medium enterprises (MSMEs) is introduced to assess the level of implementation of sustainability strategies and practices in this type of business. According to the literature, only a ... -
Classical simple Lie 2-algebras of odd toral rank and a contragredient Lie 2-algebra of toral rank 4
(Cartagena de Indias, 2021-04-29)After the classification of simple Lie algebras over a field of characteristic p > 3, the main problem not yet solved in the theory of finite dimensional Lie algebras is the classification of simple Lie algebras over a ...
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.
