Now showing items 162-181 of 203

    • Predicting seasonal influenza transmission using functional regression models with temporal dependence 

      Oviedo de la Fuente, Manuel; Febrero Bande, Manuel; Muñoz Gracia, María del Pilar; Domínguez García, Ángela (Public Library of Science, 2018-04-25)
      This paper proposes a novel approach that uses meteorological information to predict the incidence of influenza in Galicia (Spain). It extends the Generalized Least Squares (GLS) methods in the multivariate framework to ...
    • Predicting trace gas concentrations using quantile regression models 

      Conde Amboage, Mercedes; González Manteiga, Wenceslao; Sánchez Sellero, César Andrés (Springer, 2017)
      Quantile regression methods are evaluated for computing predictions and prediction intervals of NOx concentrations measured in the vicinity of the power plant in As Pontes (Spain). For these data, smaller prediction errors ...
    • Presmoothing in functional linear regression 

      Ferraty, Frédéric; González Manteiga, Wenceslao; Martínez Calvo, Adela; Vieu, Philippe (Academia Sinica, Institute of Statistical Science, 2012)
      In this paper, we consider the functional linear model with scalar response, and explanatory variable valued in a function space. In recent literature, functional principal components analysis (FPCA) has been used to ...
    • Quantile regression: estimation and lack-of-fit tests 

      Conde Amboage, Mercedes; González Manteiga, Wenceslao; Sánchez Sellero, César Andrés (Sociedad de Estadística e Investigación Operativa, 2018)
      Although mean regression achieved its greatest diffusion in the twentieth century, it is very surprising to observe that the ideas of quantile regression appeared earlier. While the beginning of the least-squares regression ...
    • R implementation of a polyhedral approximation to a 3D set of points using the α-shape 

      Lafarge, Thomas; Pateiro López, Beatriz; Possolo, Antonio; Dunkers, Joy P. (American Statistical Association, 2014-01)
      This work presents the implementation in R of the α-shape of a nite set of points in the three-dimensional space R3. This geometric structure generalizes the convex hull and allows to recover the shape of non-convex and ...
    • Real-time predictive seasonal influenza model in Catalonia, Spain 

      Basile, Luca; Oviedo de la Fuente, Manuel; Torner, Nuria; Martínez, Ana I.; Jané, Mireia (Public Library of Science, 2018-05-07)
      Influenza surveillance is critical to monitoring the situation during epidemic seasons and predictive mathematic models may aid the early detection of epidemic patterns. The objective of this study was to design a real-time ...
    • Recent Existence Results for Second-Order Singular Periodic Differential Equations 

      Chu, Jifeng; Nieto Roig, Juan José (SpringerOpen, 2009)
      We present some recent existence results for second-order singular periodic differential equations. A nonlinear alternative principle of Leray-Schauder type, a well-known fixed point theorem in cones, and Schauder's fixed ...
    • A Reliable Algorithm for a Local Fractional Tricomi Equation Arising in Fractal Transonic Flow 

      Singh, Jagdev; Kumar, Devendra; Nieto Roig, Juan José (MDPI, 2016-05-25)
      The pivotal proposal of this work is to present a reliable algorithm based on the local fractional homotopy perturbation Sumudu transform technique for solving a local fractional Tricomi equation occurring in fractal ...
    • A reliable method for estimating the postmortem interval from the biochemistry of the vitreous humor, temperature and body weight 

      Cordeiro, Cristina; Ordóñez Mayán, Lucía; Lendoiro Belío, Elena; Febrero Bande, Manuel; Vieira, Duarte Nuno; Muñoz Barús, José Ignacio (Elsevier, 2019)
      The estimation of the time elapsed since death is of paramount importance in the field of forensic sciences and criminal investigation, owing, among other factors, to the possible legal repercussions. Over the past few ...
    • Resolution methods for mathematical models based on differential equations with Stieltjes derivates 

      López Pouso, Rodrigo; Márquez Albés, Ignacio (University of Szeged, 2019)
      Stieltjes differential equations, i.e. differential equations with usual derivatives replaced by derivatives with respect to given functions (derivators), are useful to model processes which exhibit dead times and/or ...
    • Robust fixed-time synchronization of discontinuous Cohen–Grossberg neural networks with mixed time delays 

      Kong, Fanchao; Zhu, Quanxin; Liang, Feng; Nieto Roig, Juan José (Vilnius University Press, 2019)
      This paper aims to investigate the fixed-time synchronization (i.e., synchronization in fixed-time sense) of Cohen–Grossberg drive-response neural networks with discontinuous neuron activations and mixed time delays (both ...
    • Second order evolution equations with nonlocal conditions 

      Benchohra, Mouffak; Nieto Roig, Juan José; Rezoug, Noreddine (De Gruyter, 2017)
      In this paper, we shall establish su cient conditions for the existence of solutions for second order semilinear functional evolutions equation with nonlocal conditions in Fréchet spaces. Our approach is based on the ...
    • Semiparametric prediction models for variables related with energy production 

      González Manteiga, Wenceslao; Febrero Bande, Manuel; Piñeiro Lamas, María (SpringerOpen, 2018)
      In this paper a review of semiparametric models developed throughout the years thanks to an extensive collaboration between the Department of Statistics and Operations Research of the University of Santiago de Compostela ...
    • Simulation and Optimization Models of Steady-state Gas Transmission Networks 

      Bermúdez de Castro López-Varela, Alfredo; González Díaz, Julio; González Diéguez, Francisco Javier; González Rueda, Ángel Manuel; Pérez Fernández de Cordoba, María (Elsevier, 2015)
      Managing a gas transport network is a complex problem because of the number of possibilities of routing the gas through the pipes. The most important aim in this kind of systems is to fulfill the demand within the pressure ...
    • Sistemas de control suplementario da contaminación atmosférica 

      Bermúdez Cela, José Luis; Fernández de Castro, Belén María; Souto González, José Antonio (Universidade de Santiago de Compostela, 2002)
      Os sistemas de control suplementario da contaminación atmosférica, baseados en efectuar cambios nas condicións de operación para reduci-las emisións atmosféricas en condicións meteorolóxicas adversas, permiten evita-la ...
    • Skim yoghurt with microbial transglutaminase: evaluation of consumer acceptance 

      García Gómez, Belén; Romero Rodríguez, María Ángeles; Vázquez Odériz, María Lourdes; Muñoz Ferreiro, María de las Nieves; Vázquez Vázquez, Manuel (Taylor & Francis, 2019)
      The decrease in the fat content of yoghurt causes sensory modifications. Microbial transglutaminase (TG) has been proposed as an alternative for reducing the problems caused by the fat reduction. This work deals with the ...
    • Soil organic carbon in peninsular Spain: Influence of environmental factors and spatial distribution 

      Calvo de Anta, Rosa María; Luis Calvo, Elías; Febrero Bande, Manuel; Galiñanes Costa, Juan Manuel; Macías Vázquez, Felipe; Ortíz, Roque; Casás Sabarís, Francisco (Elsevier, 2020)
      Soil organic carbon (SOC) stocks and their geographical distribution in peninsular Spain were estimated from a georeferenced database consisting of 12,724 surface samples (0–30 cm) and 3607 subsurface samples (30–50 cm), ...
    • Solutions and Green’s function of the first order linear equation with reflection and initial conditions 

      Cabada Fernández, Alberto; Fernández Tojo, Fernando Adrián (Springer International Publishing, 2014)
      This work is devoted to the study of the existence and sign of Green’s functions for first order linear problems with constant coefficients and initial (one point) conditions. We first prove a result on the existence ...
    • Some Results for Integral Inclusions of Volterra Type in Banach Spaces 

      Agarwal, Ravi P.; Benchohra, Mouffak; Nieto Roig, Juan José; Ouahab, Abdelghani (SpringerOpen, 2010)
      We first present several existence results and compactness of solutions set for the following Volterra type integral inclusions of the form: yt ∈ t 0 at − s Ays Fs, ys ds, a.e. t ∈ J, where J 0, b , A is the ...
    • Sparse matrix classification on imbalanced datasets using convolutional neural networks 

      Pichel Campos, Juan Carlos; Pateiro López, Beatriz (IEEE, 2019)
      This paper deals with the class imbalance problem in the context of the automatic selection of the best storage format for a sparse matrix with the aim of maximizing the performance of the sparse matrix vector multiplication ...





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