{"id":89121,"date":"2001-02-03T00:00:00","date_gmt":"2001-02-03T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/metodos-de-maxima-entropia-en-el-estudio-estructural-de-cuasicristales\/"},"modified":"2001-02-03T00:00:00","modified_gmt":"2001-02-03T00:00:00","slug":"metodos-de-maxima-entropia-en-el-estudio-estructural-de-cuasicristales","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/metodos-de-maxima-entropia-en-el-estudio-estructural-de-cuasicristales\/","title":{"rendered":"M\u00e9todos de maxima entropia en el estudio estructural de cuasicristales"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Amaia P\u00e9rez Echevarria <\/strong><\/h2>\n<p>La aplicaci\u00f3n del m\u00e9todo de m\u00e1xima entrop\u00eda (men) en el estudio estrucutral de cuasicristales ha encontrado muchas dificultades debidas a la alta dimensionalidad del problema. Para mejorar la resoluci\u00f3n de la imagen superespacial se han propuesto diferentes algoritmos en los cuales men es aplicada tanto en el espacio f\u00edsico c\u00f3mo en el interno. En elpresente trabajo  se propone un algoritmo nuevo que permite recuperar sucesivas secciones per\u00f3dicas que contienen direcciones en el espaico f\u00edsico y en el interno. el algoritmo debe garantizar que la soluci\u00f3n obtenida al aplicar men en la secci\u00f3n se formalmente id\u00e9ntica a la obtenida (para la misma secci\u00f3n) mediante la aplicaci\u00f3n de men de la manera tradicional en el superespacio completo. Esta condici\u00f3n se satisface cuando los datos que restringen el proceso de men en la secci\u00f3n est\u00e1n basados en una distribuci\u00f3n normal de proyecciones repasadas de los factores de la estructura en la secic\u00f3n. el peso asignado a cada reflexi\u00f3n en la proyecci\u00f3n es el inverso de la varianza experimental correspondiente a cada factor de estrucuta. El truncamiento de los factores de estructura debido a la incompletitud del conjunto de datos experimental es evitado mediante la introducci\u00f3n de una restricci\u00f3n adicional (modelo a priori), que limita las posibles soluciones. \u00e9sta es introducida en el espacio rec\u00edproco en vez de usar una distribuci\u00f3n de probabilidad definida en el espacio directo. Se presenta la aplicaci\u00f3n del algoritmo en el estudio estructural de la fase decagonal al-co-ni y de la fase icosa\u00e9drica al-cu-li.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>M\u00e9todos de maxima entropia en el estudio estructural de cuasicristales<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 M\u00e9todos de maxima entropia en el estudio estructural de cuasicristales <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Amaia P\u00e9rez Echevarria <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Pa\u00eds vasco\/euskal herriko unibertsitatea<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 02\/03\/2001<\/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>Gotzon Madariaga Menendez<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal:  P\u00e9rez mato Juan  manuel <\/li>\n<li>Luis Arag\u00f3n jose (vocal)<\/li>\n<li>mart\u00edn Mart\u00ednez ripoll (vocal)<\/li>\n<li> Zu\u00f1iga lagares Francisco Javier (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Amaia P\u00e9rez Echevarria La aplicaci\u00f3n del m\u00e9todo de m\u00e1xima entrop\u00eda (men) en el estudio estrucutral de cuasicristales [&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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