Listar Dpto. Estadística, Informática y Matemáticas - Estatistika, Informatika eta Matematika Saila [desde mayo 2018 / 2018ko maiatzetik] por título
Mostrando ítems 381-400 de 511
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Quadcopter neural controller for take-off and landing in windy environments
(Elsevier, 2023) Artículo / ArtikuluaThis paper proposes the design of a quadcopter neural controller based on Reinforcement Learning (RL) for controlling the complete maneuvers of landing and take-off, even in variable windy conditions. To facilitate RL ... -
Quantifying external information in social network analysis: an application to comparative mythology
Social network analysis is a popular tool to understand the relationships between interacting agents by studying the structural properties of their connections. However, this kind of analysis can miss some of the domain-specific ... -
Quasi-greedy bases in ℓp (0 < p < 1) are democratic
The list of known Banach spaces whose linear geometry determines the (nonlinear) democracy functions of their quasi-greedy bases to the extent that they end up being democratic, reduces to c0, ℓ2, and all separable L1-spaces. ... -
Quasi-metrics for possibility results: intergenerational preferences and continuity
In this paper, we provide the counterparts of a few celebrated impossibility theorems for continuous social intergenerational preferences according to P. Diamond, L.G. Svensson and T. Sakai. In particular, we give a topology ... -
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, ... -
Risk-averse decision-making to maintain supply chain viability under propagated disruptions
(Taylor and Francis Group, 2023) Artículo / ArtikuluaIn this paper, stochastic optimisation of CVaR is applied to maintain risk-averse viability and improve resilience of a supply chain under propagated disruptions. In order to establish the risk-averse boundaries on supply ... -
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 ... -
A scalable approach for short-term disease forecasting in high spatial resolution areal data
Short-term disease forecasting at specific discrete spatial resolutions has become a high-impact decision-support tool in health planning. However, when the number of areas is very large obtaining predictions can be ... -
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, ...