Exploració per autor "Egozcue Rubí, Juan José"
Ara es mostren els items 1-20 de 53
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A posteriori error estimation for standard finite element analysis
Díez, Pedro; Egozcue Rubí, Juan José; Huerta, Antonio (1998-09)
Article
Accés obertA new residual type estimator based on projections of the error on subspaces of locally-supported functions is presented. The estimator is defined by a standard element-by-element refinement. First, an approximation of the ... -
Air quality index revisited from a compositional point of view
Jarauta Bragulat, Eusebio; Hervada Sala, Carme; Egozcue Rubí, Juan José (2016-06)
Article
Accés obertThe so-called Air Quality Index (AQI), expresses the quality of atmospheric air. The overall AQI is determined from the AQIs of some reference air pollutants, which are calculated by a transform of the respective concentrations. ... -
Análisis de datos composicionales: aguas, contaminantes, recursos, sociología...
Egozcue Rubí, Juan José; Tolosana Delgado, Raimon; Jarauta Bragulat, Eusebio; Ortego Martínez, María Isabel; Díaz Barrero, José Luis (Universitat Politècnica de Catalunya. Escola Tècnica Superior d'Enginyers de Camins Canals i Ports de Barcelona, 2011-11-15)
Comunicació de congrés
Accés obertLos datos composicionales describen las partes de un todo. Se presentan en forma de vectores proporciones, porcentajes, concentraciones químicas etc. y aparecen en multitud de campos de la ciencia y la ingeniería. A pesar ... -
Análisis y previsión de fenómenos naturales peligrosos
Tolosana Delgado, Raimon; Egozcue Rubí, Juan José; Ortego Martínez, María Isabel; Sánchez-Arcilla Conejo, Agustín (Universitat Politècnica de Catalunya. Escola Tècnica Superior d'Enginyers de Camins Canals i Ports de Barcelona, 2011-11-16)
Comunicació de congrés
Accés obertLa toma de decisiones referentes al diseño o en sistemas de alerta requieren el estudio de las acciones externas (frecuentemente meteorológicas), la descripción probabilista del sistema (vulnerabilidad, susceptibilidad) ... -
Approaching predator-prey Lotka-Volterra equations by simplicial linear differential equations
Jarauta Bragulat, Eusebio; Egozcue Rubí, Juan José (CIMNE, 2011)
Text en actes de congrés
Accés obertPredator-prey Lotka-Volterra equations was one of the rst models reflecting interaction of different species and modeling evolution of respective populations. It considers a large population of hares (preys) which is ... -
Balances: a new perspective for microbiome analysis
Rivera Pinto, J.; Egozcue Rubí, Juan José; Pawlowsky Glahn, Vera; Paredes, Raul; Noguera Julian, Marc; Calle, M. L. (2018-07)
Article
Accés obertHigh-throughput sequencing technologies have revolutionized microbiome research by allowing the relative quantification of microbiome composition and function in different environments. In this work we focus on the ... -
Bayes linear spaces
van den Boogaart, Karl Gerald; Egozcue Rubí, Juan José; Pawlowsky Glahn, Vera (2010-12)
Article
Accés obertLinear spaces consisting of $\sigma$-finite probability measures and infinite measures (improper priors and likelihood functions) are defined. The commutative group operation, called perturbation, is the updating given by ... -
Bayes linear spaces
van den Boogaart, Karl Gerald; Egozcue Rubí, Juan José; Pawlowsky Glahn, Vera (Institut d'Estadística de Catalunya, 2010)
Article
Accés obertLinear spaces consisting of -finite probability measures and infinite measures (improper priors and likelihood functions) are defined. The commutative group operation, called perturbation, is the updating given by Bayes ... -
Bayesian estimation of the orthogonal decomposition of a contingency table
Ortego Martínez, María Isabel; Egozcue Rubí, Juan José (2016)
Article
Accés obertIn a multinomial sampling, contingency tables can be parametrized by probabilities of each cell. These probabilities constitute the joint probability function of two or more discrete random variables. These probability ... -
Bayesian estimation of the orthogonal decomposition of a contingency table
Ortego Martínez, María Isabel; Egozcue Rubí, Juan José (2015)
Text en actes de congrés
Accés obertContingency tables can be parametrized by probabilities of each cell in a multinomial sampling. These probabilities constitute the joint probability function of the two or more discrete random categorical variables. These ... -
Bayesian trend analysis for daily rainfall series of Barcelona
Ortego Martínez, María Isabel; Gibergans Bàguena, José; Tolosana Delgado, Raimon; Egozcue Rubí, Juan José; Llasat Botija, Maria Carmen (2010-07-15)
Article
Accés obertA Point-Over-Threshold approach using a reparameterization of the Generalized Pareto Distribution (GPD) has been used to assess changes in the daily rainfall Barcelona series (1854–2006). A Bayesian approach, considering ... -
Checking model-data weather hazard occurrence fit in the context of climate change
Tolosana Delgado, Raimon; Ortego Martínez, María Isabel; Egozcue Rubí, Juan José; Sánchez-Arcilla Conejo, Agustín (2011)
Text en actes de congrés
Accés obertIn climate change impact studies it is common to run a given response model (from ecosystem changes to wavestorm or landslide occurrence) nested into one of the available long-term Global or Regional Circulation Models ... -
Chronic kidney disease of unknown origin is associated with environmental urbanisation in Belfast, UK
McKinley, Jennifer M.; Mueller, Ute; Atkinson, Peter M.; Ofterdinger, Ulrich; Cox, Siobhan F.; Doherty, Rory; Fogarty, Damian; Egozcue Rubí, Juan José; Pawlowsky Glahn, Vera (2021-07)
Article
Accés obertChronic kidney disease (CKD), a collective term for many causes of progressive renal failure, is increasing worldwide due to ageing, obesity and diabetes. However, these factors cannot explain the many environmental clusters ... -
Classifying wave forecasts with model-based geostatistics and the Aitchison distribution
Tolosana Delgado, Raimon; Egozcue Rubí, Juan José; Sánchez-Arcilla Conejo, Agustín; Gómez Aguar, Jesús Javier (2010)
Text en actes de congrés
Accés restringit per política de l'editorial -
Climate change in a Point-Over-Threshold model: an example on ocean-wave-storm hazard in NE Spain
Tolosana Delgado, Raimon; Ortego Martínez, María Isabel; Egozcue Rubí, Juan José; Sánchez-Arcilla Conejo, Agustín (2010-09-27)
Article
Accés obertA reparametrization of the Generalized Pareto Distribution is here proposed. It is suitable to parsimoniously check trend assumptions within a Point-Over-Threshold model of hazardous events. This is based on considerations ... -
Compositional data techniques for the analysis of the container traffic share in a multi-port region
Grifoll Colls, Manel; Ortego Martínez, María Isabel; Egozcue Rubí, Juan José (Springer, 2019-12)
Article
Accés obertThe statistical techniques based on compositional data are applied to investigate the evolution of the traffic share of the container throughput in a multi-port system. Compositional vectors are those which contain relative ... -
Descripción del oleaje por el método de las direcciones instantáneas
Arribas Perea, Miguel Ángel; Egozcue Rubí, Juan José (1992-12)
Article
Accés obertSe presenta el método de las direcciones instantáneas para la descripción del oleaje. El punto de partida es el hecho de que las series temporales de la elevación de la superficie del mar contienen más información que la ... -
Estimació del pol i de la variància del soroll d'un model AR(1) mitjançant filtratge no lineal
Muñoz Gracia, María del Pilar; Martí Recober, Manuel; Egozcue Rubí, Juan José (Universitat Politècnica de Barcelona. Centre de Càlcul, 1988)
Article
Accés obertL'estimació dels paràmetres associats a un procés ARMA es pot plantejar com un problema de filtratge no lineai. Per determinar un estimador recursiu d'aquests paràmetres es deflneix un vector d'estat ampliat que inclou les ... -
Estimación del parámetro b de Richter a partir de las medidas imprecisas de intensidad epicentral
Forcada Plaza, Santiago; Egozcue Rubí, Juan José (Institut d'estadística de Catalunya, 1996)
Article
Accés obertEl objetivo de este trabajo es la estimación del parámetro exponencial de Richter que determina la distribución de probabilidad de la variable intensidad de movimientos sísmicos que se producen en una determinada zona. Las ... -
Evidence functions: a compositional approach to information
Egozcue Rubí, Juan José; Pawlowsky Glahn, Vera (Institut d'Estadística de Catalunya, 2018-07-01)
Article
Accés obertThe discrete case of Bayes’ formula is considered the paradigm of information acquisition. Prior and posterior probability functions, as well as likelihood functions, called evidence functions, are compositions following ...