A. Paulo Coimbra
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View article: Control and stabilization of quadcopters subjected to propeller failures
Control and stabilization of quadcopters subjected to propeller failures Open
View article: Artificial intelligence-driven protocol for secure and standardized maneuver control in electrical substations
Artificial intelligence-driven protocol for secure and standardized maneuver control in electrical substations Open
View article: MCDM Optimization-Based Development of a Plus-Energy Microgrid Architecture for University Buildings and Smart Parking
MCDM Optimization-Based Development of a Plus-Energy Microgrid Architecture for University Buildings and Smart Parking Open
This paper presents a multi-criteria decision-making (MCDM) approach for optimizing a microgrid system to achieve Plus-Energy Building (PEB) performance at the University of Coimbra’s Electrical Engineering Department. Using Python 3.12.8,…
View article: Artificial intelligence applied in identifying left ventricular walls in myocardial perfusion scintigraphy images: Pilot study
Artificial intelligence applied in identifying left ventricular walls in myocardial perfusion scintigraphy images: Pilot study Open
This paper proposes the use of artificial intelligence techniques, specifically the nnU-Net convolutional neural network, to improve the identification of left ventricular walls in images of myocardial perfusion scintigraphy, with the obje…
View article: EVOLUÇÃO DO CÂNCER EM HUMANOS: COMPARANDO MEIO URBANO E RURAL
EVOLUÇÃO DO CÂNCER EM HUMANOS: COMPARANDO MEIO URBANO E RURAL Open
View article: Architecture and Operational Control for Resilient Microgrids—A University Case Study
Architecture and Operational Control for Resilient Microgrids—A University Case Study Open
The growing frequency of natural disasters has led to an increase in occurrences in which critical infrastructure and small urban centres are damaged and isolated from the main utility grid. Microgrids, with their ability to operate indepe…
View article: Smart Thermostat Controls and Thermal Comfort Optimization: Advancing Energy Efficiency of Flexible Hvac in Nzeb
Smart Thermostat Controls and Thermal Comfort Optimization: Advancing Energy Efficiency of Flexible Hvac in Nzeb Open
View article: Handwriting Assessment Using a Haptic Joystick for Rehabilitation Purposes
Handwriting Assessment Using a Haptic Joystick for Rehabilitation Purposes Open
Writing skills play a major part in communication, whether in a typing or in a handwriting scenario. Thus, a decrease or even loss of these skills can be a major setback. The system described herein aims to promote handwriting rehabilitati…
View article: Enhancement of the Performance of Switched Reluctance Generators in Low Wind Speed Conditions Using Advanced Tracking Techniques
Enhancement of the Performance of Switched Reluctance Generators in Low Wind Speed Conditions Using Advanced Tracking Techniques Open
This paper presents a tracking method to improve the performance of switched reluctance generators in areas with low wind speeds. The main contribution of this work is the proposal of an advanced control system that employs dynamic trackin…
View article: Complexity measure based on sensitivity analysis applied to an intensive care unit system
Complexity measure based on sensitivity analysis applied to an intensive care unit system Open
View article: Forest Vegetation Detection Using Deep Learning Object Detection Models
Forest Vegetation Detection Using Deep Learning Object Detection Models Open
Forest fires have become increasingly prevalent and devastating in many regions worldwide, posing significant threats to biodiversity, ecosystems, human settlements, and the economy. The United States (USA) and Portugal are two countries t…
View article: Sunspot Detection Using YOLOv5 in Spectroheliograph H-Alpha Images
Sunspot Detection Using YOLOv5 in Spectroheliograph H-Alpha Images Open
Solar activity has been subject to increasingly more research in the last decades. Its influence on life on Earth is now better understood. Solar winds impact the earth’s magnetic field and atmosphere. They can disrupt satellite communicat…
View article: Platform and Simulator with Three Degrees of Freedom for Testing Quadcopters
Platform and Simulator with Three Degrees of Freedom for Testing Quadcopters Open
View article: Comparative Evaluation of Mobile Platforms for Non-Structured Environments and Performance Requirements Identification for Forest Clearing Applications
Comparative Evaluation of Mobile Platforms for Non-Structured Environments and Performance Requirements Identification for Forest Clearing Applications Open
The effort to automate is present across all industries. It has an economic purpose but potential impacts go far beyond economics. Research has been carried out and a lot of investment has been made in automation in a variety of industries…
View article: Optimization Process Applied in the Thermal and Luminous Design of High Power LED Luminaires
Optimization Process Applied in the Thermal and Luminous Design of High Power LED Luminaires Open
This work proposes the design of an optimization method for high-power LED luminaires with the introduction of new evaluation metrics. A luminaire geometry computational method is deployed to conduct thermal and optical analysis. This curr…
View article: Comparative Analysis of the Optimization and Implementation of Adjustment Parameters for Advanced Control Techniques
Comparative Analysis of the Optimization and Implementation of Adjustment Parameters for Advanced Control Techniques Open
This paper proposes the implementation, analysis and comparison of the control techniques Proportional, Integral and Derivative, Nonlinear Predictive, Fuzzy control and Sliding Mode Control technique applied to the speed control of an inde…
View article: Application of the Horizontal Soil Stratification and Lateral Profiling Methods for 3D Mapping of the Soil Electrical Resistivity
Application of the Horizontal Soil Stratification and Lateral Profiling Methods for 3D Mapping of the Soil Electrical Resistivity Open
This work presents a methodology for horizontal soil stratification and a device for 3D soil mapping using the discretization of the Wenner’s method. The methodology starts from the application of the lateral profiling method in conjunctio…
View article: Smart Thermostats for a Campus Microgrid: Demand Control and Improving Air Quality
Smart Thermostats for a Campus Microgrid: Demand Control and Improving Air Quality Open
Achieving nearly zero-energy buildings (nZEB) is one of the main objectives defined by the European Union for achieving carbon neutrality in buildings. nZEBs are heavily reliant on distributed renewable generation energy sources, which cre…
View article: Measure of Customer Satisfaction in the Residential Electricity Distribution Service Using Structural Equation Modeling
Measure of Customer Satisfaction in the Residential Electricity Distribution Service Using Structural Equation Modeling Open
The main objective of this study is to apply structural equation modeling with partial least squares, and based on covariance, to assess the satisfaction of residential electricity consumers. The methodology used compares the results of bo…
View article: Measure of Customer Satisfaction in the Residential Electricity Distribution Service Using Structural Equation Modeling
Measure of Customer Satisfaction in the Residential Electricity Distribution Service Using Structural Equation Modeling Open
The main objective of this study is to apply structural equation modeling with partial least squares and based on covariance to assess the satisfaction of residential electricity consumers. The methodology used compares the results of both…
View article: Measure of Customer Satisfaction in the Residential Electricity Distribution Service Using Structural Equation Modeling
Measure of Customer Satisfaction in the Residential Electricity Distribution Service Using Structural Equation Modeling Open
The main objective of this study is to apply structural equation modeling with partial least squares and based on covariance to assess the satisfaction of residential electricity consumers. The methodology used compares the results of both…
View article: Root System Analysis and Influence of Moisture on Soil Electrical Properties
Root System Analysis and Influence of Moisture on Soil Electrical Properties Open
This paper proposes a methodology for plant root system and soil moisture analysis through the geoelectrical prospecting method. Overall, bench and field experiments are implemented to analyze the behavior of electrical conductivity of the…
View article: Analysis and Adequacy Methodology for Voltage Violations in Distribution Power Grid
Analysis and Adequacy Methodology for Voltage Violations in Distribution Power Grid Open
This paper proposes a computational process development capable of filling the electric power sector shortage regarding voltage non-conformities identification in electric distribution power grid accounting for loads dynamic behavior at me…
View article: Non-Destructive Fast Estimation of Tree Stem Height and Volume Using Image Processing
Non-Destructive Fast Estimation of Tree Stem Height and Volume Using Image Processing Open
Measuring biometric tree characteristics to estimate the volume of wood in a forest area is a time consuming task. It is usually performed by a team of two or more people, who measure the diameter and height of several trees in sampling pl…
View article: The NAO Robot in Slippery Scenarios: A Strategy
The NAO Robot in Slippery Scenarios: A Strategy Open
In this paper, a strategy for adapting the NAO robot to different floors with different slipperiness degrees is presented while following a desired human-like Zero Moment Point trajectory. The robot’s gait is generated based on the HRSP so…
View article: Autonomous System for Wildfire and Forest Fire Early Detection and Control
Autonomous System for Wildfire and Forest Fire Early Detection and Control Open
Recurring and increasing large-scale wildfires across the globe (e.g., Southern Europe, California, Australia), as a result of worsening climate conditions with record temperatures, drought, and strong winds, present a challenge to mankind…
View article: Treadmill and Vision System for Human Gait Acquisition and Analysis
Treadmill and Vision System for Human Gait Acquisition and Analysis Open
This paper presents a developed low cost system for human gait analysis. Two web cameras placed in opposite sides of a treadmill are used to acquire images of a person walking at different speeds on a treadmill, carrying a set of passive m…
View article: Calculation of the influence of slot geometry on the magnetic flux density of the air gap
Calculation of the influence of slot geometry on the magnetic flux density of the air gap Open
The objective of this work is to investigate the influence of slotted air gap constructive parameters on magnetic flux density of rotating machines. For this purpose, different approaches were used to solve the air gap field diagram using …