Browsing EAMOArtigos by Title
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Soil organic carbon in peninsular Spain: Influence of environmental factors and spatial distribution
(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
(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
(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
(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 ... 
Spatial distribution of invasive species: an extent of occurrence approach
(Springer, 2021)Ecological Risk Assessment faces the challenge of determining the impact of invasive species on biodiversity conservation. Although many statistical methods have emerged in recent years in order to model the evolution of ... 
A Spatially Adaptive EdgePreserving Denoising Method Based on FractionalOrder Variational PDEs
(IEEE, 2020)Image denoising is a basic problem in image processing. An important task of image denoising is to preserve the significant geometric features such as edges and textures while filtering out noise. So far, this is still a ... 
SpatioTemporal Dynamic of Malaria Incidence: A Comparison of Two Ecological Zones in Mali
(MDPI, 2020)Malaria transmission largely depends on environmental, climatic, and hydrological conditions. In Mali, malaria epidemiological patterns are nested within three ecological zones. This study aimed at assessing the relationship ... 
Stability of periodic solutions of firstorder difference equations lying between lower and upper solutions
(SpringerOpen, 2005)We prove that if there exists α ≤ β, a pair of lower and upper solutions of the firstorder discrete periodic problem Δu(n) = f (n,u(n)); n ∈ IN ≡ {0, . . . ,N −1}, u(0) = u(N), with f a continuous Nperiodic function ... 
Statistical Computing in Functional Data Analysis: The R Package fda.usc
(Foundation for Open Access Statistics, 2012)This paper is devoted to the R package fda.usc which includes some utilities for functional data analysis. This package carries out exploratory and descriptive analysis of functional data analyzing its most important ... 
Statistics in biomedical research
(Consejo Superior de Investigaciones Científicas (CSIC), 2007)La Bioestadística es hoy en día una componente científica fundamental de la investigación en Biomedicina, salud pública y servicios de salud. Las áreas tradicionales y emergentes de aplicación incluyen ensayos clínicos, ... 
Stieltjes differential systems with nonmonotonic derivators
(Springer, 2020)In this work we study Stieltjes differential systems of which the derivators are allowed to change sign. This leads to the definition of the notion of a function of controlled variation, a characterization of precompact ... 
Study of solutions to some functional differential equations with piecewise constant arguments
(Hindawi, 2012)We provide optimal conditions for the existence and uniqueness of solutions to a nonlocal boundary value problem for a class of linear homogeneous secondorder functional differential equations with piecewise constant ... 
Surname regions and dialectal variation in the Asturian linguistic space
(Cambridge University Press, 2020)Studies on the correlations between spatial distribution of linguistic varieties and genetic structure of populations began by dealing with geographic spaces and extensive linguistic families. In the last two decades, ... 
System of fractional boundary value problem with pLaplacian and advanced arguments
(Springer, 2021)In this paper, we discuss the existence and multiplicity of positive solutions for a system of fractional differential equations with boundary condition and advanced arguments. The existence result is proved via Leray–Schauder’s ... 
Terminal value problem for differential equations with Hilfer–Katugampola fractional derivative
(MDPI, 2019)We present in this work the existence results and uniqueness of solutions for a class of boundary value problems of terminal type for fractional differential equations with the Hilfer–Katugampola fractional derivative. ... 
Testing for signif cant differences between two spatial patterns using covariates
(Elsevier, 2019)This paper addresses the problem of comparing the spatial distribution of two point patterns. A formal statistical test is proposed to decide whether two observed patterns share the same theoretical intensity model. ... 
Testing for the equality of k regression curves
(Academia Sinica, Institute of Statistical Science, 2007)Assume that (Xj , Yj ) are independent random vectors satisfying the nonparametric regression models Yj = mj (Xj ) + σj (Xj )εj , for j = 1, . . . , k, where mj (Xj ) = E(Yj Xj ) and σ 2 j (Xj ) = Var (Yj Xj ) are ... 
Testing in generalized partially linear models: A robust approach
(Elsevier, 2013)In this paper, we introduce a family of robust statistics which allow to decide between a parametric model and a semiparametric one. More precisely, under a generalized partially linear model, i.e., when the observations ... 
The DDGclassifier in the functional setting
(Springer, 2017)The maximum depth classifier was the first attempt to use data depths instead of multivariate raw data in classification problems. Recently, the DDclassifier has addressed some of the serious limitations of this classifier ... 
The eigenvalue characterization for the constant sign Green’s functions of (k,n−k)(k,n−k) problems
(Springer International Publishing, 20160211)This paper is devoted to the study of the sign of the Green’s function related to a general linear nthorder operator, depending on a real parameter, Tn[M]Tn[M], coupled with the (k,n−k)(k,n−k) boundary value conditions. If ...