{"id":36429,"date":"1998-01-01T00:00:00","date_gmt":"1998-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/desarrollo-de-metodos-quimiometricos-para-el-tratamiento-de-datos-multivariables\/"},"modified":"1998-01-01T00:00:00","modified_gmt":"1998-01-01T00:00:00","slug":"desarrollo-de-metodos-quimiometricos-para-el-tratamiento-de-datos-multivariables","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/quimica\/desarrollo-de-metodos-quimiometricos-para-el-tratamiento-de-datos-multivariables\/","title":{"rendered":"Desarrollo de metodos quimiometricos para el tratamiento de datos multivariables."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Antonio Ruiz Puigdomenech <\/strong><\/h2>\n<p>La memoria constituye un estudio sobre la aplicaci\u00f3n de m\u00e9todos quimiom\u00e9tricos para resolver problem\u00e1ticas industriales, modificando y desarrollando nuevos algoritmos con el objetivo de mejorar m\u00e9todos quimiom\u00e9tricos convencionales.  se adapta el m\u00e9todo de davidon-fletcher-powell como m\u00e9todo iterativo de c\u00e1lculo y se aplica a la resoluci\u00f3n de mezclas de principios activos presentes en preparados farmac\u00e9uticos (cafeina, \u00e1cido acetilsalic\u00edlico, paracetamol, etafedrina, doxilamina, fenilefrina y teofilina) a partir de sus espectros uv-vis. Las concentraciones calculadas no difieren significativamente de las obtenidas con un m\u00e9todo de regresi\u00f3n r\u00edgida como es la regresi\u00f3n lineal m\u00faltiple.  se ha desarrollado un nuevo procedimiento de selecci\u00f3n de variables para la regresi\u00f3n lineal m\u00faltiple basado en el criterio d-\u00f3ptimo, comparando dos criterios de optimizaci\u00f3n: el n\u00famero de condici\u00f3n y los par\u00e1metros de calidad de lorber. El m\u00e9todo se aplica a la resoluci\u00f3n de mezclas de iones met\u00e1licos (al, cu, ni y fe) registrando el espectro uv-vis de sus oxinatos extra\u00eddos con cloroformo. Las concentraciones calculadas con el m\u00e9todo de selecci\u00f3n propuesto se determinan con m\u00e1s exactitud que si se emplean todas las longitudes de onda disponibles.  se modifica el algoritmo pls para realizar de forma autom\u00e1tica la selecci\u00f3n de las variables m\u00e1s informativas aplicando un test de significaci\u00f3n estad\u00edstica de lso elementos de la matriz de pesos de los loadings. Con el procedimiento desarrollado se resuleven mezclas de al, ga e in a partir de los espectros de emisi\u00f3n de fluorescencia de sus oxinatos extra\u00eddos con cloroformo.  se obtiene una mejora muy significativa en los errores relativos de predicci\u00f3n de las mezclas estudiadas respecto a los calculados con el algoritmo pls cl\u00e1sico.  en el siguiente cap\u00edtulo se modela el comportamiento de un par\u00e1metro de inter\u00e9s medioambiental, la opacidad bacharach (u<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Desarrollo de metodos quimiometricos para el tratamiento de datos multivariables.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Desarrollo de metodos quimiometricos para el tratamiento de datos multivariables. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Antonio Ruiz Puigdomenech <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma de barcelona<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1998<\/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>Marcelo Blanco Romia<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Michele Forina <\/li>\n<li> Rius Ferrus Francesc Xavier (vocal)<\/li>\n<li>Victor Cerda Martin (vocal)<\/li>\n<li>Xavier Tom\u00ed\u00a0s Morer (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Antonio Ruiz Puigdomenech La memoria constituye un estudio sobre la aplicaci\u00f3n de m\u00e9todos quimiom\u00e9tricos para resolver problem\u00e1ticas [&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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