dc.contributor |
Mateu i Figueras, Glòria |
dc.contributor |
Barceló i Vidal, Carles |
dc.contributor |
Universitat de Girona. Departament d’Informàtica i Matemàtica Aplicada |
dc.contributor.author |
Bacon Shone, John |
dc.date |
2005-10 |
dc.date.accessioned |
2009-04-01T08:27:17Z |
dc.date.available |
2009-04-01T08:27:17Z |
dc.date.issued |
2009-04-01T08:27:17Z |
dc.identifier.citation |
Bacon Shone, J. 'Convex linear combination processes for compositions' a CODAWORK’05. Girona: La Universitat, 2005 [consulta: 6 maig 2008]. Necessita Adobe Acrobat. Disponible a Internet a: http://hdl.handle.net/10256/683 |
dc.identifier.citation |
84-8458-222-1 |
dc.identifier.uri |
http://hdl.handle.net/10256/683 |
dc.format |
application/pdf |
dc.language.iso |
eng |
dc.publisher |
Universitat de Girona. Departament d’Informàtica i Matemàtica Aplicada |
dc.rights |
Consulteu les condicions d'ús d'aquest document en el repositori original:http://hdl.handle.net/10256/683 |
dc.subject |
Combinacions (Matemàtica) |
dc.title |
Convex linear combination processes for compositions |
dc.type |
info:eu-repo/semantics/conferenceObject |
dc.description.abstract |
Aitchison and Bacon-Shone (1999) considered convex linear combinations ofcompositions. In other words, they investigated compositions of compositions, wherethe mixing composition follows a logistic Normal distribution (or a perturbationprocess) and the compositions being mixed follow a logistic Normal distribution. Inthis paper, I investigate the extension to situations where the mixing compositionvaries with a number of dimensions. Examples would be where the mixingproportions vary with time or distance or a combination of the two. Practicalsituations include a river where the mixing proportions vary along the river, or acrossa lake and possibly with a time trend. This is illustrated with a dataset similar to thatused in the Aitchison and Bacon-Shone paper, which looked at how pollution in aloch depended on the pollution in the three rivers that feed the loch. Here, I explicitlymodel the variation in the linear combination across the loch, assuming that the meanof the logistic Normal distribution depends on the river flows and relative distancefrom the source origins |
dc.description.abstract |
Geologische Vereinigung; Institut d’Estadística de Catalunya; International Association for Mathematical Geology; Patronat de l’Escola Politècnica Superior de la Universitat de Girona; Fundació privada: Girona, Universitat i Futur; Càtedra Lluís Santaló d’Aplicacions de la Matemàtica; Consell Social de la Universitat de Girona; Ministerio de Ciencia i Tecnología.cat |