Universitat de Girona
La Universitat de Girona és una institució pública que cerca l’excel·lència en la docència i en la recerca, i que participa en el progrés i el desenvolupament de la societat, mitjançant la creació, transmissió, difusió i crítica de la ciència, la tècnica, les humanitats, les ciències socials i les arts.La Universitat de Girona està arrelada al país i a la cultura catalana i és un dels principals motors econòmics i culturals del seu entorn. Al mateix temps, expressa la vocació d’universalitat i d’obertura a totes les tradicions, avenços i cultures.La Universitat té la seva seu a la ciutat de Girona i s’integra en el sistema d’universitats públiques catalanes.
Si sou autor/a d’algun document elaborat en l’àmbit de la Universitat de Girona i voleu publicar-lo a RECERCAT, contacteu amb recercat@udg.edu.
On standard control charts, the hypothesis of normality is usually assumed without any additional verification. Nevertheless, in some cases this assumption is not accurate and might cause errors in process quality ...
A Monte-Carlo model of exospheres was extended by treating the solar wind ion induced sputtering process, quantitatively in a self-consistent way starting with the actual release of particles from the mineral surface of ...
The development of russet on ’Golden Delicious’ apples is a problem of concern to growers of fresh market apples. Russeting is considered to be due to untimely divisions of cells in the epidermis of the fruit initiated ...
Generation of random variables are needed in the simulations of many natural process. For some random variables, different methodologies are known, specially into euclidean spaces. In this paper a routine for dealing ...
Perturbation and powering are two operations in the simplex that define a vector-space structure. Perturbation and powering in the simplex play the same role as the sum and product by scalars in real space. A standard ...
The biplot is a widely and powerful methodology used with multidimensional data sets to describe and display the relationships between observations and variables in an easy way. Compositional data consist of positive ...
The choice of the sediment size fraction in the analysis of fossil planktonic foraminifera is of great importance in determining the composition of assemblages. In past studies several size fractions have been utilised. ...
Bayes theorem (discrete case) is taken as a paradigm of information acquisition. As mentioned by Aitchison, Bayes formula can be identified with perturbation of a prior probability vector and a discrete likelihood function, ...
Bootstrap resampling is an attractive, computationally-intensive approach for estimating population parameters and their associated uncertainties. Values below detection limit- also referred to as non-detects- frequently ...
In this paper we compare multivariate methods using both traditional approaches, which ignore issues of closure and provide relatively simple methods to deal with censored or missing data, and log-ratio methods to determine ...
Principal balances are defined as a sequence of orthonormal balances which maximize successively the explained variance in a data set. Apparently, computing principal balances requires an exhaustive search along all ...
Historically CoDaPack 3D has intended to be a software of Compositional Data with an easy and intuitive way of use. For this reason from the beginning it has been associated to Excel, a software known and used for many ...
The variety of resources that a population exploits is known as the “niche width”. A particular population has a narrow niche if only few kinds of the available resources are exploited by its members. When the individuals ...
