Exploració per autor "Ortego Martínez, María Isabel"
Ara es mostren els items 21-36 de 36
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Evaluation of natural background levels of high mountain karst aquifers in complex hydrogeological settings. A Gaussian mixture model approach in the Port del Comte (SE, Pyrenees) case study
Herms Canellas, Joan Ignasi; Jódar, Jorge; Soler, Albert; Lambán, Javier; Custodio Gimena, Emilio; Nuñez, Joan Agustí; Arnó, Georgina; Ortego Martínez, María Isabel; Parcerisa Duocastella, David; Jorge, Joan (Elsevier, 2021-02)
Article
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Modelling of future extreme storm surges at the NW Mediterranean coast (Spain)
Lin Ye, Jue; García León, Manuel; Gracia Garcia, Vicente; Ortego Martínez, María Isabel; Lionello, Piero; Conte, Dario; Pérez Gómez, Begoña; Sánchez-Arcilla Conejo, Agustín (2020-02)
Article
Accés obertStorm surges are one of the main drivers for extreme flooding at the coastal areas. Such events can be characterized with the maximum level in an extreme storm surge event (surge peak), as well as the duration of the event. ... -
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. ... -
Multivariate hybrid modelling of future wave-storms at the northwestern Black Sea
Lin Ye, Jue; García León, Manuel; Gracia Garcia, Vicente; Ortego Martínez, María Isabel; Stanica, Adrian; Sánchez-Arcilla Conejo, Agustín (2018-02)
Article
Accés obertThe characterization of future wave-storms and their relationship to large-scale climate can provide useful information for environmental or urban planning at coastal areas. A hybrid methodology (process-based and statistical) ... -
Multivariate statistical modelling of future marine storms
Lin Ye, Jue; García León, Manuel; Gracia Garcia, Vicente; Ortego Martínez, María Isabel; Lionello, Piero; Sánchez-Arcilla Conejo, Agustín (2017-04)
Article
Accés obertExtreme events, such as wave-storms, need to be characterized for coastal infrastructure design purposes. Such description should contain information on both the univariate behaviour and the joint-dependence of storm-variables. ... -
Pluviometric regionalization of Catalunya: a compositional data methodology
Gibergans Bàguena, José; Ortego Martínez, María Isabel; Tolosana Delgado, Raimon (Centro Internacional de Métodos Numéricos en Ingeniería (CIMNE), 2011)
Text en actes de congrés
Accés obertThe aim of this paper is to introduce a methodology for de¯ning groups from regionalized com- positional data, through a hierarchical clustering algorithm aware of both the spatial dependence and the compositional character ... -
Pluviometric regionalization of Catalunya: a compositional data methodology
Gibergans Bàguena, José; Ortego Martínez, María Isabel; Tolosana Delgado, Raimon (CIMNE, 2011)
Text en actes de congrés
Accés obertThe aim of this paper is to introduce a methodology for de¯ning groups from regionalized com- positional data, through a hierarchical clustering algorithm aware of both the spatial dependence and the compositional character ... -
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 ... -
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 ... -
Spurious copulas
Ortego Martínez, María Isabel; Egozcue Rubí, Juan José (2013)
Text en actes de congrés
Accés obertModeling dependence between two or more variables is a common issue in statistical applications. The Pearson correlation coefficient is often used to measure dependence, although it -
Tree ecosystem services, for everyone? A compositional analysis approach to assess the distribution of urban trees as an indicator of environmental justice
Cruz Sandoval, Marco Antonio; Ortego Martínez, María Isabel; Roca Bosch, Elisabet (2020-02-07)
Article
Accés obertTrees provide a broad amount of ecosystem services in urban areas. Although it is well documented that trees are essential for the well-being and livability of cities, trees are often not evenly distributed. Studies have ... -
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 (2009-09-11)
Text en actes de congrés
Accés obertFrequency analysis of hydrological series is a key point to acquire an in-depth understanding of the behaviour of hydrologic events. The occurrence of extreme hydrologic events in an area may imply great social and ... -
Use of statistical tools in a development context analysis of variance (ANOVA)
Ortego Martínez, María Isabel; Lloret, Enric (GDEE, 2015)
Capítol de llibre
Accés obert -
Wind/Wave directional modelling: a compositional approach
Ortego Martínez, María Isabel; Egozcue Rubí, Juan José; Gómez Aguar, Jesús Javier; Mösso Aranda, César; Sánchez-Arcilla Conejo, Agustín (2015)
Comunicació de congrés
Accés obert