Exploració per autor "Tolosana Delgado, Raimon"
Ara es mostren els items 9-25 de 25
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Geochemistry versus grain-size relations of sediments in the light of comminution, chemical alteration, and contrasting source rocks
von Eynatten, Hilmar; Tolosana Delgado, Raimon (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2011)
Text en actes de congrés
Accés obertAround 170 sediment samples from glacial and proximal glacio-fluvial deposits have been analysed for their geochemical composition. Samples derive from two strongly contrasting source areas (granitoids vs. amphibolite) and ... -
Geochemistry versus grain-size relations of sediments in the light of comminution, chemical alteration, and contrasting source rocks
Von Eynatten, H.; Tolosana Delgado, Raimon (CIMNE, 2011)
Text en actes de congrés
Accés obertAround 170 sediment samples from glacial and proximal glacio-fluvial deposits have been analysed for their geochemical composition. Samples derive from two strongly contrasting source areas (granitoids vs. amphibolite) ... -
Grain-size control on petrographic composition of sediments: compositional regression and rounded zeroes
Tolosana Delgado, Raimon; von Eynatten, Hilmar (2009-03-26)
Article
Accés obertIt is well-known that sediment composition strongly depends on grain size. A number of studies have tried to quantify this relationship focusing on the sand fraction, but only very limited data exists covering wider grain ... -
Guía para el análisis espacial de datos composicionales
Tolosana Delgado, Raimon (2011)
Article
Accés obertEl tratamiento de bases de datos composicionales (proporciones, porcentajes, concentraciones, etc.) con dependencia espacial debe hacerse atendiendo a las características matemáticas de éstos: una composición válida debe ... -
Jurassic granitoid magmatism in the Dinaride Neotethys: geochronological constraints from detrital minerals
Mikes, Tamás; Bäresel, Björn; Kronz, Andreas; Frei, Dirk; Dunkl, István; Tolosana Delgado, Raimon; von Eynatten, Hilmar (2009-12-01)
Article
Accés restringit per política de l'editorialThree independent single-grain geochronometers applied to detrital minerals from Central Dinaride sediments constrain the timing of felsic magmatism that associated the Jurassic evolution of the Neotethys. The Lower ... -
Modelling barrier beaches under storms with XBEACH: The case of the Trabucador bar
García León, Manuel; Solé, J.M.; Gracia Garcia, Vicente; Alomar, Marta; Tolosana Delgado, Raimon; Fernández, J.; Pallarès López, Elena; Jiménez Quintana, José Antonio; Sánchez-Arcilla Conejo, Agustín (2011)
Text en actes de congrés
Accés obert -
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 ... -
Principal balances
Pawlowsky Glahn, Vera; Egozcue Rubí, Juan José; Tolosana Delgado, Raimon (International Centre for Numerical Methods in Engineering (CIMNE), 2011)
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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 ... -
The compositional meaning of a detection limit
Gerald van den Boogaart, K.; Tolosana Delgado, Raimon; Bren, Matevz (CIMNE, 2011)
Text en actes de congrés
Accés obertIn compositional data analysis a value below detection limit (BDL) is typically modeled as the definitive information that the actual value is below some fixed value - the detection limit (see e.g. Palarea- Albaladejo ... -
The compositional meaning of a detection limit
van den Boogaart, Karl Gerald; Tolosana Delgado, Raimon; Bren, Matevz (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2011)
Text en actes de congrés
Accés obertConclusions The chemical interpretation of the detection limit and its stochastic model counterpart has thus different consequences for the statistical analysis than we would expect from the word by word interpretation of ... -
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 ... -
Unmixing compositional data with Bayesian techniques
Tolosana Delgado, Raimon (CIMNE, 2011)
Text en actes de congrés
Accés obertA general problem in compositional data analysis is the unmixing of a composition into a series of pure endmembers. In its most complex version, one does neither know the composition of these endmembers, nor their relative ... -
Unmixing compositional data with Bayesian techniques
Tolosana Delgado, Raimon (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2011)
Text en actes de congrés
Accés obertA general problem in compositional data analysis is the unmixing of a composition into a series of pure endmembers. In its most complex version, one does neither know the composition of these endmembers, nor their relative ... -
Uses and misuses of compositional data in sedimentology
Tolosana Delgado, Raimon (2012-12)
Article
Accés restringit per política de l'editorialThis paper serves two goals. The first part shows how mass evolution processes of different nature become undistinguishable once we take a size-limited, noisy sample of its compositional fingerprint: processes of exponential ... -
Wave height data assimilation using non-stationary kriging
Tolosana Delgado, Raimon; Egozcue Rubí, Juan José; Sánchez-Arcilla Conejo, Agustín; Gómez Aguar, Jesús Javier (2011-03)
Article
Accés restringit per política de l'editorialData assimilation into numerical models should be both computationally fast and physically meaningful, in order to be applicable in online environmental surveillance. We present a way to improve assimilation for computationally ...