Exploració per autor "Egozcue Rubí, Juan José"
Ara es mostren els items 21-40 de 53
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Evidence information in Bayesian updating
Egozcue Rubí, Juan José; Pawlowsky Glahn, Vera (CIMNE, 2011-06)
Altres
Accés obertBayes theorem (discrete case) is taken as a paradigm of information acquisition. As men-tioned by Aitchison, Bayes formula can be identified with perturbation of a prior probability vector and a discrete likelihood function, ... -
Exploration of geochemical data with compositional canonical biplots
Graffelman, Jan; Pawlowsky Glahn, Vera; Egozcue Rubí, Juan José; Buccianti, A. (2018-07-25)
Article
Accés obertThe study of the relationships between two compositions is of paramount importance in geochemical data analysis. This paper develops a compositional version of canonical correlation analysis, called CoDA-CCO, for this ... -
Fractal and compositional analysis of soil aggregation
Parent, Leon Etienne; Parent, Serge-Etienne; Kätterer, Thomas; Egozcue Rubí, Juan José (CIMNE, 2011)
Text en actes de congrés
Accés obertA soil aggregate is made of closely packed sand, silt, clay, and organic particles building up soil structure. Soil aggregation is a soil quality index integrating the chemical, physical, and biological processes ... -
Irrigation suitability, health risk assessment and source apportionment of heavy metals in surface water used for irrigation near marble industry in Malakand, Pakistan
Khan, Asghar; Khan, Muhammad Saleem; Egozcue Rubí, Juan José; Shafique, Munib Ahmed; Nadeem, Sidra; Saddiq, Ghulam (Public Library of Science (PLOS), 2022-12-01)
Article
Accés obertWater is a vital, finite resource whose quantity and quality are deteriorating as the world population increases. The current study aims to investigate the concentration of heavy metals (HM) in surface water for irrigation ... -
Long-term impact of fecal transplantation in healthy volunteers
Goloshchapov, Oleg V.; Olekhnovich, Evgenii I.; Sidorenko, Sergey V.; Egozcue Rubí, Juan José (2019-12)
Article
Accés obertFecal microbiota transplantation (FMT) has been recently approved by FDA for the treatment of refractory recurrent clostridial colitis (rCDI). Success of FTM in treatment of rCDI led to a number of studies investigating ... -
Microbiome datasets are compositional: and this is not optional
Gloor, Gregory B.; Macklaim, Jean M.; Pawlowsky Glahn, Vera; Egozcue Rubí, Juan José (2017-11)
Article
Accés obertDatasets collected by high-throughput sequencing (HTS) of 16S rRNA gene amplimers, metagenomes or metatranscriptomes are commonplace and being used to study human disease states, ecological differences between sites, and ... -
Modelización de la peligrosidad sísmica: aplicación a Cataluña
Canas Torres, José Antonio; Egozcue Rubí, Juan José; Miquel Canet, Juan; Barbat Barbat, Horia Alejandro (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 1996)
Llibre
Accés obertUn método Bayesiano para la evaluación de la probabilidad de ocurrencia de sismos. Pseudo-aceleraciones del terreno en el subbloque ibero-costero pirenaico. Determinación de las acciones sísmicas de diseño. -
Modelling compositional change with simplicial linear ordinary differential equations
Jarauta Bragulat, Eusebio; Egozcue Rubí, Juan José (2013)
Text en actes de congrés
Accés obert -
Modified Kolmogorov-Smirnov test of goodness of fit
Monti, Gianna S.; Mateu Figueras, Gloria; Ortego Martínez, María Isabel; Pawlowsky Glahn, Vera; Egozcue Rubí, Juan José (2017)
Text en actes de congrés
Accés obertA modified version of the Kolmogorov-Smirnov (KS) test is presented as a tool to assess whether a specified, although arbitrary, probability model is unsuitable to describe the underlying distribution of a set of observations. ... -
Power bias in maximum entropy spectral analysis
Egozcue Rubí, Juan José; Pagès Fita, Jaume (Universitat Politècnica de Barcelona. Centre de Càlcul, 1983-06)
Article
Accés obertSeveral algorithms have been used in maximum entropy spectral analysis. Among them, the standard Burg procedure and the forward-backward least squares method are considered. When the autoregressive model, which is implicit ... -
Principal balances
Pawlowsky Glahn, Vera; Egozcue Rubí, Juan José; Tolosana Delgado, Raimon (International Centre for Numerical Methods in Engineering (CIMNE), 2011)
Text en actes de congrés
Accés obertPrincipal 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 possible ... -
Principal balances
Pawlowsky Glahn, Vera; Egozcue Rubí, Juan José; Tolosana Delgado, Raimon (CIMNE, 2011)
Text en actes de congrés
Accés obertPrincipal balances are de ned 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 ... -
Probabilistic analysis of an a posteriori error estimator for finite elements
Díez, Pedro; Egozcue Rubí, Juan José (2001-08)
Article
Accés obertA residual type a posteriori error estimator for finite elements is analyzed using a new technique. In this case, the error estimate is the result of two consecutive projections of the exact error on two finite-dimensional ... -
Proportionality: a valid alternative to correlation for relative data
Lovell, David; Pawlowsky-Glahn, Vera; Egozcue Rubí, Juan José; Marguerat, Samuel; Baehler, Juerg (2015-03-01)
Article
Accés obertIn the life sciences, many measurement methods yield only the relative abundances of different components in a sample. With such relative-or compositional-data, differential expression needs careful interpretation, and ... -
Relationship between popularity of key words in the Google browser and the evolution of worldwide financial indexes
ORTELLS SESÉ, ROBERT; Egozcue Rubí, Juan José; Ortego Martínez, María Isabel; Garola Crespo, Àlvar (2015)
Text en actes de congrés
Accés obertThe purpose of this contribution is to evaluate whether there is enough statistical basis to establish a relationship between the popularity of certain terms in the Google, Inc. browser and the evolution of several worldwide ... -
Relationship between the popularity of key words in the Google browser and the evolution of worldwide financial indices
Ortells Sesé, Robert; Egozcue Rubí, Juan José; Ortego Martínez, María Isabel; Garola Crespo, Àlvar (Springer, 2016)
Capítol de llibre
Accés restringit per política de l'editorialThe authoritative contributions gathered in this volume reflect the state of the art in compositional data analysis (CoDa). The respective chapters cover all aspects of CoDa, ranging from mathematical theory, statistical ... -
Reply to
Egozcue Rubí, Juan José (2009-10)
Article
Accés restringit per política de l'editorial -
Rethinking the Kolmogorov-Smirnov test of Goodness of fit in a compositional way
Monti, Gianna S.; Mateu Figueras, Gloria; Ortego Martínez, María Isabel; Pawlowsky Glahn, Vera; Egozcue Rubí, Juan José (Pearson, 2018)
Text en actes de congrés
Accés obertThe Kolmogorov Smirnov test (KS) is a well known test used to asses how a set of observations is significantly different from the probability model specified under the null hypothesis. The KS test statistic quantifies the ... -
Some thoughts on counts in sequencing studies
Egozcue Rubí, Juan José; Graffelman, Jan; Ortego Martínez, María Isabel; Pawlowsky Glahn, Vera (2020-12-01)
Article
Accés obertMeasurements in sequencing studies are mostly based on counts. There is a lack of theoretical developments for the analysis and modelling of this type of data. Some thoughts in this direction are presented, which might ... -
Space-time compositional models: an introduction to simplicial partial differential operators
Jarauta Bragulat, Eusebio; Egozcue Rubí, Juan José (2015)
Text en actes de congrés
Accés obertA function assigning a composition to space-time points is called a compositional or simplicial field. These fields can be analysed using the compositional analysis tools. A study of linear models for evolutionary compositions ...