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Power Balancing in Cascaded H-Bridge and Modular Multilevel Converters Under Unbalanced Operation: A Review
(IEEE, 2021)
Multilevel Voltage-Source Converters (VSC) based on modular structures are envisioned as a prominent alternative for grid and industry applications. Foremost among these are the Cascaded H-Bridge (CHB) and the Modular ...
Ofermod y heroísmo humilde: sobre la interpretación de Tolkien
(Universidad de La Laguna, 2021)
El presente trabajo estudia la interpretación del heroísmo germano por Tolkien tomando como punto de partida su ensayo-poema «The Homecoming of Beorhtnoth Beorhthelm’s Son» sobre La Batalla de Maldon. A través de textos ...
Calendar Ageing Model for Li-Ion Batteries Using Transfer Learning Methods
(MDPI, 2021)
Getting accurate lifetime predictions for a particular cell chemistry remains a challenging process, largely dependent on time and cost-intensive experimental battery testing. This paper proposes a transfer learning (TL) ...
Análisis de las creencias sobre la concepción de la educación física de los futuros docentes durante la formación universitaria
(Juan Carlos Muñoz Díaz, 2021)
El objetivo de este estudio consiste en analizar cómo influyen las creencias previas sobre la Educación Física en los futuros docentes de esa área. Así mismo, se pretende valorar en qué medida la formación universitaria ...
Novel High Accuracy Resolver Topology for Space Applications
(MDPI, 2021)
In recent years, the space industry has experienced a significant change mainly due to the incursion of private companies, which has shaken up the sector. This new situation allows for a reduction regarding the reliability ...
Analytical Model to Calculate Radial Forces in Permanent-Magnet Synchronous Machines
(MDPI, 2021)
There are three principal sources of noise and vibration in electrical machines: electromagnetic sources, mechanical sources, and aerodynamic sources. Nowadays, one of the major advantages of permanent-magnet synchronous ...
Giza eta gizarte-zientziak eta irakasleen Prestakuntzarako unibertsitate-masterra: paradigma epistemologikoa
(2021)
Humanitate eta Gizarte Zientzien arloko Irakasleak Prestatzeko Masterra egiten ari di-ren ikasleek gizarteaz eta gizarteak irakaskuntzari buruz duen ikuspegiaz gogoeta egin behar luketela iri-tzita, eta, ...
Petri net-based semi-compiled code generation for programmable logic controllers
(MDPI, 2021)
Industrial discrete event dynamic systems (DEDSs) are commonly modeled by means of Petri nets (PNs). PNs have the capability to model behaviors such as concurrency, synchronization, and resource sharing, compared to a step ...
Using Machine Learning to Build Test Oracles: an Industrial Case Study on Elevators Dispatching Algorithms
(IEEE, 2021)
The software of elevators requires maintenance over several years to deal with new functionality, correction of bugs or legislation changes. To automatically validate this software, test oracles are necessary. A typical ...
DC-Link Neutral Point Control for 3L-NPC Converters Utilizing Selective Harmonic Elimination PWM
(IEEE, 2021)
Selective harmonic elimination–pulsewidth modulation (SHE–PWM) is a modulation technique widely used to improve the efficiency and harmonic content in medium-voltage high-power converters. Among these converters, the ...
Microservices for Continuous Deployment, Monitoring and Validation in Cyber-Physical Systems: an Industrial Case Study for Elevators Systems
(IEEE, 2021)
Cyber-Physical Systems (CPSs) are systems that integrate digital cyber computations with physical processes. The software embedded in CPSs has a long life-cycle, requiring constant evolution to support new requirements, ...
Contact pressure, sliding velocity and viscosity dependent friction behavior of lubricants used in tube hydroforming processes
(2021)
The final quality of sheet and tube metal formed components strongly depends of the tribology and friction conditions between the tools and the material to be formed. Furthermore, it has been recently demonstrated that ...
How to Quantify the Security Level of Embedded Systems? A Taxonomy of Security Metrics
(IEEE, 2020)
Embedded Systems (ES) development has been historically focused on functionality rather than security, and today it still applies in many sectors and applications. However, there is an increasing number of security threats ...
In-depth Life Cycle Cost Analysis of a Li-ion Battery-based Hybrid Diesel-Electric Multiple Unit
(IEEE, 2020)
This study analyzes the life cycle costs of railway projects involving hybrid diesel-electric multiple units, focusing on the influence of lithium-ion battery technologies and energy management strategies. Specifically, 3 ...
Partial Power Processing Based Charging Unit for Electric Vehicle Extreme Fast Charging Stations
(IEEE, 2020)
This paper presents an analysis and design of a charging unit inside an electric vehicle extreme fast charging station. Due to the benefits that partial power processing achieves in terms of size reduction and efficiency ...
A Holistic and Interoperable Approach towards the Implementation of Services for the Digital Transformation of Smart Cities: The Case of Vitoria-Gasteiz
(MDPI, 2021)
Cities in the 21st century play a major role in the sustainability and climate impact reduction challenges set by the European agenda. As the population of cities grows and their environmental impact becomes more evident, ...
Molinos de viento patentados por Jerónimo de Ayanz y Beaumont en el año 1606: un análisis conceptual desde una perspectiva ingenieril del año 2021
(Mondragon Unibertsitatea, 2021)
En el presente documento técnico, se realiza un análisis desde un punto de vista ingenieril de los molinos de viento patentados por Jerónimo de Ayanz y Beaumont el siglo XVII. El análisis que se presenta podría denominarse ...
Numerical characterization of local and global non-uniformities in the load distribution in ball screws
(Springer, 2021)
Load distribution in ball screws is a representation of the ball contact stress, and it is fundamental to understanding the behavior of these machine elements. This work aims to conduct a multi-variable analysis of the ...
The Neverending Story: Memory Corruption 30 Years Later
(Springer, 2021)
Memory errors have been present in software for more than three decades now, leading to numerous security issues. Low-level languages like C and C++ that are prone to this class of errors are in widespread use, meaning ...
Initiation of dynamic recrystallization of as-cast N08028 alloy
(ESAFORM, 2021)
The use of high nickel content austenitic stainless steels (SASS) has significantly increased in the last decade. The corrosion and high fatigue resistance of these materials make them suitable for manufacturing oil country ...