Now showing items 1-20 of 44

    • A textural deep neural network architecture for mechanical failure analysis 

      Bastidas Rodríguez, Maria Ximena
      Nowadays, many classification problems are approached with deep learning architectures, and the results are outstanding compared to the ones obtained with traditional computer vision approaches. However, when it comes ...
    • Analysis and development of a personal portable lightning protection system 

      Cristancho Caviativa, Jorge Alejandro
      Colombia has a very high lightning activity as shown in different published lightning maps. Any activity that takes place outdoors in stormy weather, even more in places recognized as having high lightning activity, at ...
    • Análisis de la propagación de perturbaciones de calidad de potencia mediante el uso de modelos epidemiológicos 

      Romero Lozano, Miguel Fernando
      En esta tesis se propuso dos metodologías para análisis de perturbaciones de calidad de potencia. La primera metodología consiste en el análisis del impacto de factores de riesgo en la ocurrencia de distorsión armónica en ...
      Universidad Nacional de Colombia Sede Bogotá Facultad de Ingeniería Departamento de Ingeniería Eléctrica y Electrónica. 
    • Application of Time-Frequency Transformations in Polarimetric Ultra-Wideband MIMO-GPR signals for Detection of Colombian Improvised Explosive Devices 

      Gutiérrez Duarte, Sergio Alonso
      Abstract. In this thesis, a new radar technique for GPR detection and discrimination of Improvised Explosive Devices is presented and validated. Data processing, consisting of adaptive filters and time-frequency ...
      Universidad Nacional de Colombia Sede Bogotá Facultad de Ingeniería Departamento de Ingeniería Eléctrica y Electrónica. 
    • Associative learning for collective decision-making in dynamic environments 

      Chica Pedraza, Gustavo Alonso
      In the past few decades, animal behavior has become one of the most attractive subjects of study in the academic field. This can be understood due to its connection with evolutionary theories, which employ concepts of ...
    • Avances en el modelamiento y experimentación de tensiones inducidas en redes de distribución 

      Pérez González, Ernesto
      Abstract. This Phd Thesis was focused on the lightning induced transients modeling on long and complex networks and the induced voltage measurements on energized distribution networks. Here is described and compared two ...
      Universidad Nacional de Colombia Sede Bogotá Facultad de Ingeniería Departamento de Ingeniería Eléctrica y Electrónica Ingeniería Eléctrica. 
    • Combined Heat and Power Economic Dispatch for Isolated Microgrids 

      Romero Quete, David Fernando
      Microgrids (MGs) have gathered significant attention over the last decade due to their potential to integrate Renewable Energies (RE) into power systems, in a reliable and efficient way, and their ability to provide ...
      Universidad Nacional de Colombia Sede Bogotá Facultad de Ingeniería Departamento de Ingeniería Eléctrica y Electrónica Ingeniería Eléctrica. 
    • Control methods for network dynamics and criticality phenomena 

      Caro Ruiz, Claudia Catalina
      This dissertation studies the role of the network structure on the emergence and mitigation of critical phenomena in complex power networks. In particular, the event to consider is the emergence of cascading failures due ...
      Universidad Nacional de Colombia Sede Bogotá Facultad de Ingeniería Departamento de Ingeniería Eléctrica y Electrónica Ingeniería Eléctrica. 
    • Data-driven control of interconnected energy systems 

      Toro Tovar, Billy Wladimir
      This research proposed several algorithms for the identification and control of microgrids based on the Koopman operator. The contributions presented in this manuscript are focused on the control of voltage and reactive ...
    • Desempeño de sensores de campo electrostático en sistemas de alerta de tormentas 

      Aranguren Fino, Harby Daniel
      Esta tesis presenta un estudio operacional y científico de sensores de campo electrostático mediante el análisis de tormentas eléctricas en tres lugares: Colombia (2010), usando una estación de medida en Bogotá; Florida - ...
      Universidad Nacional de Colombia Sede Bogotá Facultad de Ingeniería Departamento de Ingeniería Eléctrica y Electrónica. 
    • Design of a high power ultra wideband system using a fast impulse current generator 

      Vega Stavro, Jose Felix
      This thesis presents a DC-Charged high amplitude electromagnetic radiator. The radiator consists of a Half Impulse Radiating Antenna (HIRA) fed by a coaxial Pulse Forming Line (PFL), which is charged using a mechanism based ...
      Universidad Nacional de Colombia Sede Bogotá Facultad de Ingeniería Departamento de Ingeniería Eléctrica y Electrónica Ingeniería Eléctrica. 
    • Despacho de energía y reserva en microredes considerando criterios de seguridad probabilísticos 

      Luna Ramírez, Luis Ernesto
      First, this PhD thesis presents and discusses the various types of forecasting techniques that may be issued as input to decision-making problems. A particular emphasis on predictions was placed, since markets ought to be ...
      Universidad Nacional de Colombia Sede Bogotá Facultad de Ingeniería Departamento de Ingeniería Eléctrica y Electrónica Ingeniería Eléctrica. 
    • Development of algorithms to improve the technical efficiency of capturing, processing, and identification of EEG signals in the word imagery task 

      Villamizar Delgado, Sergio Iván
      A Brain-Computer Interface (BCI) system is a powerful tool that decodes signals from the brain and translates it into codes which are understood by software to perform a specific task. Through a BCI, a disabled person can ...
    • Dynamic line rating state estimation 

      Álvarez Álvarez, David Leonardo
      Nowadays, the assets of power systems face economic, social, technical and environmental challenges. These challenges arise as a consequence of energy system dynamics that need to increase their reliability and safety as ...
      Universidad Nacional de Colombia Sede Bogotá Facultad de Ingeniería Departamento de Ingeniería Eléctrica y Electrónica Ingeniería Eléctrica. 
    • Efficient interaction with large medical imaging databases 

      Corredor Prada, Germán
      Everyday, a wide quantity of hospitals and medical centers around the world are producing large amounts of imaging content to support clinical decisions, medical research, and education. With the current trend towards ...
      Universidad Nacional de Colombia Sede Bogotá Facultad de Ingeniería Departamento de Ingeniería Eléctrica y Electrónica. 
    • Experimental research work on a sub-millimeter spark-gap for sub-nanosecond gas breakdown 

      Santamaría Piedrahita, Francisco
      Abstract. This thesis presents the results of a study developed in a sub‐millimeter spark‐gap. For developing the study, a coaxial pulse generator with an internal spark‐gap was constructed. The design and construction ...
      Universidad Nacional de Colombia Sede Bogotá Facultad de Ingeniería Departamento de Ingeniería Eléctrica y Electrónica. 
    • Fast security constraint optimal power flow using parallel and heterogenous computing 

      Rodríguez Medina, Diego Fernando
      Optimal and secure grid operation is paramount for modern power systems. However, the ever increasing system size, number of conventional and renewable sources, not to mention system loads and power system controllers, ...
    • Few-mode photonic crystal fibers for mode-converter devices and sensing applications 

      Reyes Vera, Erick Estefen
      One of the major challenges in telecommunications is related with the increase of the transmission capacity of optical links. To carry out this task, several experts recommend the use of spatial division multiplexing ...
      Universidad Nacional de Colombia Sede Bogotá Facultad de Ingeniería Departamento de Ingeniería Eléctrica y Electrónica Ingeniería Eléctrica. 
    • Hardware-based complex natural resonances extraction techniques for portable ground penetrating radar operations 

      Gallego Garcés, Andrés Junior
      Here, a contribution to the Improvised Explosive Devices remote detection in Colombia in terms of Ground Penetrating Radar signal analysis is presented. The Complex Natural Resonances Extraction Methods for characterizing ...
    • Hybrid optical fiber-wireless communication to support tactile internet 

      Rico Martinez, Monica Andrea
      5G technologies are systems that will set to change the way people, devices and machines connect. This generation of mobile services provide connection in just one click. The advanced 5G infrastructure, defined as “ubiquitous ...
      Universidad Nacional de Colombia Sede Bogotá Facultad de Ingeniería Departamento de Ingeniería Eléctrica y Electrónica.