Listar Dpto. Estadística, Informática y Matemáticas - Estatistika, Informatika eta Matematika Saila [desde mayo 2018 / 2018ko maiatzetik] por título
Mostrando ítems 377-396 de 498
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Real elements and p-nilpotence of finite groups
Our first main result proves that every element of order 4 of a Sylow 2-subgroup S of a minimal non-2-nilpotent group G, is a real element of S. This allows to give a character-free proof of a theorem due to Isaacs and ... -
Reducing SO₂ doses in red wines by using grape stem extracts as antioxidants
SO₂ is a very important wine preservative. However, there are several drawbacks associated with the use of SO₂ in wine. The aim of this work is to evaluate the effect of the partial substitution of SO₂ in the Tempranillo ... -
Reduction of the size of L-fuzzy contexts. A tool for differential diagnoses of diseases
Information extraction from an L-fuzzy context becomes a hard problem when we work with a large set of objects and/or attributes. The goal of this paper is to present two different and complementary techniques to reduce ... -
Reeb’s theorem and periodic orbits for a rotating Hénon–Heiles potential
We apply Reeb’s theorem to prove the existence of periodic orbits in the rotating Hénon– Heiles system. To this end, a sort of detuned normal form is calculated that yields a reduced system with at most four non degenerate ... -
Reemplazo de la función de pooling de redes neuronales convolucionales por combinaciones lineales de funciones crecientes
Las redes convolucionales llevan a cabo un proceso automatico de extracción y fusión de características mediante el cual obtienen la información más relevante de una imagen dada. El proceso de submuestreo mediante el cual ... -
Relevance of sex, age and gait kinematics when predicting fall-risk and mortality in older adults
Approximately one-third of elderly people fall each year with severe consequences, including death. The aim of this study was to identify the most relevant features to be considered to maximize the accuracy of a logistic ... -
Remarkable bolides recorded along August 2021 in the framework of the Southwestern Europe Meteor Network
The most remarkable fireballs observed along August 2021 in the framework of the Southwestern Europe Meteor Network (SWEMN) and the SMART project are presented in this work. These fireballs overflew the Iberian Peninsula ... -
Remarkable fireballs spotted in the framework of the Southwestern Europe Meteor Network along August and September 2022
Some of the bright bolides observed in the framework of the Southwestern Europe Meteor Network between August and September 2022 are described in this work. These have been spotted from the Iberian Peninsula. Their ... -
Replacing pooling functions in convolutional neural networks by linear combinations of increasing functions
Traditionally, Convolutional Neural Networks make use of the maximum or arithmetic mean in order to reduce the features extracted by convolutional layers in a downsampling process known as pooling. However, there is no ... -
Representation and aggregation of crisp and fuzzy ordered structures: applications to social choice
The present memory is structured as follows: after the Introduction, in the Chapter 2 of preliminaries, we will pay attention to the three areas which sustain the development of this thesis. These are, binary relations, ... -
Robots for elderly care: review, multi-criteria optimization model and qualitative case study
This paper focuses on three areas: the first is a review of current knowledge about social and service robots for elderly care. The second is an optimization conceptual model aimed at maximizing the efficiency of assigning ... -
Scalable Bayesian modeling for smoothing disease mapping risks in large spatial data sets using INLA
Several methods have been proposed in the spatial statistics literature to analyse big data sets in continuous domains. However, new methods for analysing high-dimensional areal data are still scarce. Here, we propose a ... -
Scale recoding in sociological research: a new validation methodology. An application to a political survey
La recodificación de variables es una etapa habitual en el análisis de datos de encuesta. No está exenta de riesgos, como pueden ser la introducción de sesgos o las posibles deformaciones de los datos originales. En este ... -
Scores of hesitant fuzzy elements revisited: "Was sind und was sollen"
(Elsevier, 2023) Artículo / ArtikuluaThis paper revolves around the notion of score for hesitant fuzzy elements, the constituent parts of hesitant fuzzy sets. Scores allow us to reduce the level of uncertainty of hesitant fuzzy sets to classical fuzzy sets, ... -
Searching for a Debreu’s open gap lemma for semiorders
In 1956 R. D. Luce introduced the notion of a semiorder to deal with indifference relations in the representation of a preference. During several years the problem of finding a utility function was studied until a ... -
Selecting freight transportation modes in last-mile urban distribution in Pamplona (Spain): an option for drone delivery in smart cities
Urban distribution in medium-sized cities faces a major challenge, mainly when deliveries are difficult in the city center due to: an increase of e-commerce, weak public transportation system, and the promotion of urban ... -
Semiorders and continuous Scott–Suppes representations. Debreu’s Open Gap Lemma with a threshold
The problem of finding a utility function for a semiorder has been studied since 1956, when the notion of semiorder was introduced by Luce. But few results on continuity and no result like Debreu’s Open Gap Lemma, but for ... -
Sensorimotor functional connectivity: a neurophysiological factor related to BCI performance
Brain-computer interfaces (BCIs) are systems that allow users to control devices using brain activity alone. However, the ability of participants to command BCIs varies from subject to subject. About 20% of potential users ... -
Series representations of the Volterra function and the Fransén–Robinson constant
The Volterra function μ(t,β,α) was introduced by Vito Volterra in 1916 as the solution to certain integral equations with a logarithmic kernel. Despite the large number of applications of the Volterra function, the only ... -
Short- and mid-term evaluation of the use of electric vehicles in urban freight transport collaborative networks: a case study
Despite its negative impacts, freight transportation is a primary component of all supply chains. Decision makers have considered diverse strategies, such as Horizontal Collaboration (HC) and the usage of alternative types ...