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Detalhes

Detalhes

Publicações

2022

Forecasting Student s Dropout: A UTAD University Study

Autores
Da Silva, DEM; Pires, EJS; Reis, A; Oliveira, PBD; Barroso, J;

Publicação
FUTURE INTERNET

Abstract
In Portugal, the dropout rate of university courses is around 29%. Understanding the reasons behind such a high desertion rate can drastically improve the success of students and universities. This work applies existing data mining techniques to predict the academic dropout mainly using the academic grades. Four different machine learning techniques are presented and analyzed. The dataset consists of 331 students who were previously enrolled in the Computer Engineering degree at the Universidade de Tras-os-Montes e Alto Douro (UTAD). The study aims to detect students who may prematurely drop out using existing methods. The most relevant data features were identified using the Permutation Feature Importance technique. In the second phase, several methods to predict the dropouts were applied. Then, each machine learning technique's results were displayed and compared to select the best approach to predict academic dropout. The methods used achieved good results, reaching an Fl-Score of 81% in the final test set, concluding that students' marks somehow incorporate their living conditions.

2021

A Set of Active Disturbance Rejection Controllers Based on Integrator Plus Dead-Time Models

Autores
Huba, M; Oliveira, PM; Bistak, P; Vrancic, D; Zakova, K;

Publicação
APPLIED SCIENCES-BASEL

Abstract
The paper develops and investigates a novel set of constrained-output robust controllers with selectable response smoothing degree designed for an integrator-plus-dead-time (IPDT) plant model. The input-output response of the IPDT system is internally approximated by several time-delayed, possibly higher-order plant models of increasing complexity. Since they all contain a single integrator, the presented approach can be considered as a generalization of active disturbance rejection control (ADRC). Due to the input/output model used, the controller commissioning can be based on a simplified process modeling, similar to the one proposed by Ziegler and Nichols. This allows it to be compared with several alternative controllers commonly used in practice. Its main advantage is simplicity, since it uses only two identified process parameters, even when dealing with more complex systems with distributed parameters. The proposed set of controllers with increasing complexity includes the stabilizing proportional (P), proportional-derivative (PD), or proportional-derivative-acceleration (PDA) controllers. These controllers can be complemented by extended state observers (ESO) for the reconstruction of all required state variables and non-measurable input disturbances, which also cover imperfections of a simplified plant modeling. A holistic performance evaluation on a laboratory heat transfer plant shows interesting results from the point of view of the optimal least sensitive solution with smooth input and output.

2021

Practical Validation of a Dual Mode Feedforward-Feedback Control Scheme in an Arduino Kit

Autores
de Moura Oliveira, PB; Vrancic, D;

Publicação
Lecture Notes in Electrical Engineering

Abstract

2021

Your Turn to Learn – Flipped Classroom in Automation Courses

Autores
Soares, F; de Moura Oliveira, PB; Leão, CP;

Publicação
Lecture Notes in Electrical Engineering

Abstract

2021

Bridging Theory to Practice: Feedforward and Cascade Control with TCLab Arduino Kit

Autores
de Moura Oliveira, PB; Hedengren, JD; Boaventura Cunha, J;

Publicação
Lecture Notes in Electrical Engineering

Abstract

Teses
supervisionadas

2021

An Explainable Approach for Lung Cancer Classification and Integrative Survival Analysis using Omics Data

Autor
Bernardo Manuel Faria Ramos

Instituição
UP-FEUP

2019

Chat Bot -o diagmóstico de bolso

Autor
Duarte Rui Afonso Gomes Tavares do Amaral

Instituição
UTAD

2018

Análise da variabilidade da frequência cardíaca em indivíduos saudáveis e doentes

Autor
Cristina Monteiro Pinto

Instituição
UTAD

2018

Centro de Ciência de Vila Real- conceção e desenvolvimento de conteúdos multimédia

Autor
Manuel Joaquim Seixas Beteriano

Instituição
UTAD

2018

Ambientes virtuais multissensoriais: equivalência entre treino virtual e real

Autor
David  Gonçalves Narciso

Instituição
UTAD