Browsing EAMOArtigos by Title
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Parametric Estimation of Diffusion Processes: A Review and Comparative Study
(MDPI, 2021)This paper provides an indepth review about parametric estimation methods for stationary stochastic differential equations (SDEs) driven by Wiener noise with discrete time observations. The shortterm interest rate dynamics ... 
Periodic solutions for some phiLaplacian and reflection equations
(Springer International Publishing, 20160229)This work is devoted to the study of the existence and periodicity of solutions of initial differential problems, paying special attention to the explicit computation of the period. These problems are also connected with ... 
Permanence and Periodic Solution of PredatorPrey System with Holling Type Functional Response and Impulses
(Hindawi, 2007)We considered a nonautonomous two dimensional predatorprey system with impulsive effect. Conditions for the permanence of the system and for the existence of a unique stable periodic solution are obtained. 
A perspectiva de xénero na planificación da actividade estatística na Comunidade Autónoma de Galicia
(Universidade de Santiago de Compostela, 2010)O propósito deste artigo é referir o estado da cuestión polo que respecta á integración da perspectiva de xénero nas estatísticas oficiais na Comunidade galega a través da revisión da planificación estatística. Este ... 
A plugin bandwidth selector for nonparametric quantile regression
(Springer, 2018)In the framework of quantile regression, local linear smoothing techniques have been studied by several authors, particularly by Yu and Jones (J Am Stat Assoc 93:228–237, 1998). The problem of bandwidth selection was ... 
Polynomial volume estimation and its applications
(Elsevier, 2018)Given a compact set S ⊂ R d we consider the problem of estimating, from a random sample of points, the Lebesgue measure of S, µ(S), and its boundary measure, L(S) (as defined by the Minkowski content of ∂S). This topic ... 
A positive fixed point theorem with applications to systems of Hammerstein integral equations
(Springer, 2014)We present new criteria on the existence of fixed points that combine some monotonicity assumptions with the classical fixed point index theory. As an illustrative application, we use our theoretical results to prove the ... 
Positive periodic solutions for impulsive differential equations with infinite delay and applications to integro‐differential equations
(Wiley, 2020)Sufficient conditions for the existence of at least one positive periodic solution are established for a family of scalar periodic differential equations with infinite delay and nonlinear impulses. Our criteria, obtained ... 
Positive solutions for discontinuous systems via a multivalued vector version of Krasnosel’skiĭ’s fixed point theorem in cones
(MDPI, 2019)We establish the existence of positive solutions for systems of second–order differential equations with discontinuous nonlinear terms. To this aim, we give a multivalued vector version of Krasnosel’ski˘ı’s fixed point ... 
Positive solutions for secondorder boundaryvalue problems with sign changing Green's functions
(Texas State University, 2017)In this article we analyze some possibilities of finding positive solutions for secondorder boundaryvalue problems with the Dirichlet and periodic boundary conditions, for which the corresponding Green's functions change ... 
Positive solutions for φLaplacian equations with discontinuous statedependent forcing terms
(Vilnius University Press, 2019)This paper concerns the existence, localization and multiplicity of positive solutions for a Laplacian problem with a perturbed term that may have discontinuities in the state variable. First, the initial discontinuous ... 
Postoperative stress hyperglycemia is a predictor of mortality in liver transplantation
(BMC, 2018)A significant association is known between increased glycaemic variability and mortality in critical patients. To ascertain whether glycaemic profiles during the first week after liver transplantation might be associated ... 
Powerseries solution of compartmental epidemiological models
(AIMS Press, 2021)In this work, powerseries solutions of compartmental epidemiological models are used to provide alternate methods to solve the corresponding systems of nonlinear differential equations. A simple and classical SIR compartmental ... 
Predicting Malaria Transmission Dynamics in Dangassa, Mali: A Novel Approach Using Functional Generalized Additive Models
(MDPI, 2020)Mali aims to reach the preelimination stage of malaria by the next decade. This study used functional regression models to predict the incidence of malaria as a function of past meteorological patterns to better prevent ... 
Predicting seasonal influenza transmission using functional regression models with temporal dependence
(Public Library of Science, 20180425)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
(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
(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 ... 
A QIMbased evaluation of sensory quality of frozen–thawed roundnose grenadier (Coryphaenoides rupestris) and its applications
(ACS Publications, 2021)The quality index method (QIM) is widely used for fish sensory assessment, but there are hardly any studies on quality changes in fish that have been previously frozen. A QIM scheme was developed for frozen Roundnose ... 
Quantile regression: estimation and lackoffit tests
(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 leastsquares regression ... 
R implementation of a polyhedral approximation to a 3D set of points using the αshape
(American Statistical Association, 201401)This work presents the implementation in R of the αshape of a nite set of points in the threedimensional space R3. This geometric structure generalizes the convex hull and allows to recover the shape of nonconvex and ...