Convex linear combination processes for compositions
dc.contributor.author
dc.contributor.editor
dc.date.accessioned
2008-05-06T07:16:07Z
dc.date.available
2008-05-06T07:16:07Z
dc.date.issued
2005-10
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.isbn
84-8458-222-1
dc.identifier.uri
dc.description.abstract
Aitchison and Bacon-Shone (1999) considered convex linear combinations of
compositions. In other words, they investigated compositions of compositions, where
the mixing composition follows a logistic Normal distribution (or a perturbation
process) and the compositions being mixed follow a logistic Normal distribution. In
this paper, I investigate the extension to situations where the mixing composition
varies with a number of dimensions. Examples would be where the mixing
proportions vary with time or distance or a combination of the two. Practical
situations include a river where the mixing proportions vary along the river, or across
a lake and possibly with a time trend. This is illustrated with a dataset similar to that
used in the Aitchison and Bacon-Shone paper, which looked at how pollution in a
loch depended on the pollution in the three rivers that feed the loch. Here, I explicitly
model the variation in the linear combination across the loch, assuming that the mean
of the logistic Normal distribution depends on the river flows and relative distance
from the source origins
dc.description.sponsorship
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
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Universitat de Girona. Departament d’Informàtica i Matemàtica Aplicada
dc.rights
Tots els drets reservats
dc.subject
dc.title
Convex linear combination processes for compositions
dc.type
info:eu-repo/semantics/conferenceObject
dc.rights.accessRights
info:eu-repo/semantics/openAccess