Investigaciones: Envíos recientes
Mostrando ítems 901-920 de 1465
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Failures Identification in Refrigeration Equipment
(Cartagena de Indias, 2020-12-24)A refrigerator is an essential element in the preservation of perishable products; if there is some damage, its poorly performance prevents to guarantee the quality of the products contained in it, because the temperature ... -
Desarrollo e implementación de un perfilómetro óptico por triangulación láser
(Cartagena de Indias, 2020-12-24)Profilometers are instruments commonly used in surface metrology tasks. These instruments play a key role in the industry, such as in manufacturing and quality assurance. However, conventional profilometry techniques require ... -
Definición de Perfiles Geográficos de hurto de automóviles. Caso Aplicado en Cartagena de Indias
(Cartagena de Indias, 2020-06)Esta investigación desarrolla un análisis geoespacial del hurto de automóviles ocurridos en la ciudad de Cartagena de Indias - Colombia. En el proceso de definición de perfiles de criminalidad se analizó el delito del hurto ... -
Deep learning architectures for the analysis and classification of brain tumors in MR images
(Cartagena de Indias, 2020-11-03)The need to make timely and accurate diagnoses of brain diseases has posed challenges to computer-aided diagnosis systems. In this field, advances in deep learning techniques play an important role, as they carry out ... -
Data-driven framework for the detection of non-technical losses in distribution grids
(Cartagena de Indias, 2020-12-24)Non-technical losses (NTL) occurring in the electric grid, particularly at the distribution level may cause a negative impact on utilities' interest, paying consumers and states. Reducing NTL can increase revenue, profit, ... -
Lineamientos de estimación de costos para proyectos privados arquitectónicos, con base en un modelo de clasificación único
(Cartagena de Indias, 2020)El presente trabajo de investigación muestra una propuesta de pautas de estimación de costos para proyectos arquitectónicos privados en Colombia. Basado en la teoría de que un modelo de clasificación permite desarrollos ... -
Control by second order sliding modes for a double-fed induction generator for a wind turbine
(Cartagena de Indias, 2020)In recent years, the consumption of electrical energy in the world has increased, increasing the construction of power plants that operate with fossil fuels, which emit a large amount of CO2. Due to this polluting process, ... -
Biomechanical Analysis of Common Postures during Mobile Phone Use
(Cartagena de Indias, 2020-12-24)The use of mobile phones for long periods of time has been associated with musculoskeletal and vision symptoms. This work uses simplified biomechanical models of the head, neck, back, and forearms to estimate the forces ... -
Bibliobrabot: Diseño de un Brazo Robotico Asistente en Biblioteca para Discapacitados en Silla de Ruedas
(Cartagena de Indias, 2020-12-24)Libraries require physical adaptation to strengthen inclusion and equal accessibility for all people. This paper presents an assistant robot design focused on wheelchair users who demand library services. It is proposed ... -
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 ... -
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. ... -
A second-order cone programming reformulation of the economic dispatch problem of bess for apparent power compensation in ac distribution networks
(Cartagena de Indias, 2020-10-14)The problem associated with economic dispatch of battery energy storage systems (BESSs) in alternating current (AC) distribution networks is addressed in this paper through convex optimization. The exact nonlinear programming ... -
A practical methodology of design of off-line reservoirs for reducing maximum water levels in urban channels
(Cartagena de Indias, 2020-08-06)Flooding can often occur in many places due to the increasing trend of rainfall events (climate change), the urbanization process of a catchment area, or by an undersized urban channel. Reservoirs are used for limiting ... -
A novel approach for QRS complex detection in patients with atrial arrhythmia
(Cartagena de Indias, 2020-11-03)Atrial fibrillation (AF) is the most common cardiac arrhythmia in the world which shows rising prevalence leading to increased comorbidities, such as, Ischemic heart disease and Stroke that the main cause of deaths in the ... -
A New Iterative Power Flow Method for AC Distribution Grids with Radial and Mesh Topologies
(Cartagena de Indias, 2020-11-25)This brief discusses the classical problem of power flow analysis in alternating current (ac) distribution networks through Taylor series expansion. The main advantage of this approach is that it can work with radial and ... -
A Method to Rationalize the Product Portfolio in Retail Stores
(Cartagena de Indias, 2020-04-29)Retail store operations face a variety of challenges and complexities. Determining the best assortment is the main problem in the retail store. This re-search presents a practical methodology for the analysis of products ... -
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 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 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 ... -
Unidades didácticas en física como potenciadores del aprendizaje en estudiantes de ingeniería
(Cartagena de Indias, 2020-12)El objetivo del presente trabajo fue diseñar e implementar unidades didácticas en temas de física clásica y medir su impacto en los procesos de aprendizaje de estudiantes de ingeniería. El diseño de las unidades didácticas ...
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.
