{"id":78011,"date":"2018-03-09T23:23:38","date_gmt":"2018-03-09T23:23:38","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/geostatistics-for-constrained-variables-positive-data-compositions-and-probabilities-applications-to-environmental-hazard-monitoring\/"},"modified":"2018-03-09T23:23:38","modified_gmt":"2018-03-09T23:23:38","slug":"geostatistics-for-constrained-variables-positive-data-compositions-and-probabilities-applications-to-environmental-hazard-monitoring","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-tecnologicas\/geostatistics-for-constrained-variables-positive-data-compositions-and-probabilities-applications-to-environmental-hazard-monitoring\/","title":{"rendered":"Geostatistics for constrained variables: positive data, compositions and probabilities. applications to environmental hazard monitoring"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Raimon Tolosana Delgado <\/strong><\/h2>\n<p>Un modelo que permita la estimaci\u00f3n consistente de la probabilidad de un suceso debe tener en cuenta que a menudo los datos presentan dependencia espacio-temporal, y su soporte y escala no corresponden a los de una variable real. Nos centramos en como estimar la distribuci\u00f3n de las variables regionalizadas cuyo soporte acepte una estructura de espacio euclidiano. La herramienta fundamental es el principio del trabajo en coordenadas: esc\u00f3jase una base ortonormal, h\u00e1gase estad\u00edstica sobre las coordenadas de los datos, y apl\u00edquense los output a la base para recuperar un resultado en el mismo espacio. Con esta estrategia, por ejemplo, se define una distribuci\u00f3n normal en cualquier espacio eucl\u00eddeo. aplicando este principio a las variables regionalizadas, obtenemos una aproximaci\u00f3n \u00fanica consistente, que generaliza las conocidas propiedades de las distintas t\u00e9cnicas del kirgeado a varios espacios soporte: datos reales, positivos y composicionales (vectores de componentes positivas cuya suma es constante) son tratados como casos particulares. El caso real da la geoestad\u00edstica lineal cl\u00e1sica, mientras que las otras dos ofrecen alternativas que resuelven muchos de los problemas habituales de la geoestad\u00edstica no-lineal. El caso positivo, por ejemplo, ofrece un estimador de krigeado tipo media geom\u00e9trica ponderada, robusto frente a errores en la determinaci\u00f3n del variograma y con buenas propiedades de estimaci\u00f3n por intervalo.  en particular, nunca da resultados negativos, como s\u00ed sucede con otros m\u00e9todos. Adem\u00e1s, es v\u00e1lido tambi\u00e9n para bloques, y conduce a un modelo consistente de cambio de soporte: a diferencia del m\u00e9todo cl\u00e1sico, no resulta necesario asumir la conservaci\u00f3n de la lognormalidad. para el caso composicional, simplemente se generalizan las conclusiones del estudio de datos positivos. Sin embargo, dado el paralelismo existente entre una composici\u00f3n y un vector multinomial, conseguimos tambi\u00e9n una alternativa al krigeado indicador.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Geostatistics for constrained variables: positive data, compositions and probabilities. applications to environmental hazard monitoring<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Geostatistics for constrained variables: positive data, compositions and probabilities. applications to environmental hazard monitoring <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Raimon Tolosana Delgado <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Girona<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 19\/12\/2005<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Vera Pawlowsky Glahn<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Juan  jos\u00e9 Egozcue rub\u00ed <\/li>\n<li>eugenia Marti roca (vocal)<\/li>\n<li>manel Poch espallargas (vocal)<\/li>\n<li>heinz Burger (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Raimon Tolosana Delgado Un modelo que permita la estimaci\u00f3n consistente de la probabilidad de un suceso debe [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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