Results 41 to 50 of about 4,431 (78)

A Novel Unified Single-Phase Active Rectifier Topology With Advanced Operating Modes for Smart Grids

IEEE Access
Active rectifiers are of paramount importance for guaranteeing power quality in smart grids, due to their characteristics of sinusoidal current consumption and unitary power factor operation.
Vitor Monteiro, Filipe Costa, Sergio Coelho, Joao L. Afonso   +3 more
doaj   +1 more source

A Novel DC-DC Active Balancer of Currents for Bipolar DC Power Grids

IEEE Open Journal of Power Electronics
DC Power Grids (DCPGs) are becoming more important, mostly due to the inherent DC characterization of new sources and load technologies, like renewables and electric vehicles.
Vitor Monteiro, Pedro Brito, Sergio Coelho, Saghir Amin, Muhammad Awais, Joao L. Afonso   +5 more
doaj   +1 more source

“Interrupting” the Status Quo: A First Glance at the RISC-V Advanced Interrupt Architecture (AIA)

IEEE Access
Interrupt controllers are a crucial component in computing platforms. From cloud computing to embedded systems, interrupts and respective controllers enable more efficient management and operation of a platform’s resources.
Francisco Marques, Manuel Rodriguez, Bruno Sa, Sandro Pinto   +3 more
doaj   +1 more source

Let’s Get Physical: Rethinking the Static Partitioning Hypervisor Architecture for an MMU-Less Memory Model

IEEE Access
Many industries, in particular automotive, are undergoing substantial transformations in their underlying electrical and electronic architecture (E/E), pushing for a transition from traditional flat architectures to more decentralized and zonal systems ...
Afonso Santos, Jose Martins, Joao Sousa, Manuel Rodriguez, Sandro Pinto   +4 more
doaj   +1 more source

Design and Implementation of a DC–DC Resonant LLC Converter for Electric Vehicle Fast Chargers

Energies
This article presents the design and implementation of a DC–DC power converter for application in electric vehicle (EV) fast-charging systems. The prototype is of the resonant LLC type and consists of a high-power transformer operating at high frequency,
Joao Rocha, Saghir Amin, Sergio Coelho, Gonçalo Rego, Joao L. Afonso, Vitor Monteiro   +5 more
doaj   +1 more source

Ethical Decision-Making in Artificial Intelligence: A Logic Programming Approach

AI
This article proposes a framework for integrating ethical reasoning into AI systems through Continuous Logic Programming (CLP), emphasizing the improvement of transparency and accountability in automated decision-making. The study highlights requirements
José Machado, Regina Sousa, Hugo Peixoto, António Abelha   +3 more
doaj   +1 more source

Rethinking Trusted Execution Environments in the Age of Reconfigurable Computing

IEEE Access
As systems become more interconnected and complex, relying solely on general-purpose operating systems (OS) to provide the foundation for security-critical applications becomes increasingly challenging.
Sergio Pereira, David Cerdeira, Cristiano Rodrigues, Sandro Pinto   +3 more
doaj   +1 more source

Resampling approaches to handle class imbalance: a review from a data perspective

Journal of Big Data
This article presents a data-driven review of resampling approaches aimed at mitigating the class imbalance problem in machine learning, a widespread issue that limits classifier performance across numerous sectors.
Miguel Carvalho, Armando J. Pinho, Susana Brás   +2 more
doaj   +1 more source

Left atrial stiffness index – an early marker of left ventricular diastolic dysfunction in patients with coronary heart disease

BMC Cardiovascular Disorders
Aims To evaluate the correlation between left atrial stiffness index (LASI) and left ventricular diastolic function in patients with coronary heart disease (CHD) by Autostrain LA technique.
Yingxuan Tu, Xin Liu, Xiaoqing Li, Na Xue   +3 more
doaj   +1 more source

A Comparison Study of Deep Learning Methodologies for Music Emotion Recognition

Sensors
Classical machine learning techniques have dominated Music Emotion Recognition. However, improvements have slowed down due to the complex and time-consuming task of handcrafting new emotionally relevant audio features. Deep learning methods have recently
Pedro Lima Louro, Hugo Redinho, Ricardo Malheiro, Rui Pedro Paiva, Renato Panda   +4 more
doaj   +1 more source