R\u00e9sum\u00e9 :<\/strong><\/p>\n\n\n\nLes cha\u00eenes de Markov sont certainement parmi les mod\u00e8les stochastiques les plus connus. Dans ce s\u00e9minaire, ce mod\u00e8le classique est revisit\u00e9 du point de vue des espaces s\u00e9mantiques, o\u00f9 des points sont utilis\u00e9s pour repr\u00e9senter les \u00e9tats de la cha\u00eene, tandis que les probabilit\u00e9s conditionnelles sont approximativement cod\u00e9es comme fonctions exponentielles des distances entre ces points. Il sera montr\u00e9 comment la qualit\u00e9 de cette approximation peut \u00eatre r\u00e9gl\u00e9e, notamment si la dimension de l’espace s\u00e9mantique est choisie en fonction des entropies associ\u00e9es au mod\u00e8le de Markov sous-jacent. Par cons\u00e9quent, pour les mod\u00e8les parcimonieux (\u00e0 faible entropie), repr\u00e9sentations sous forme d’espaces s\u00e9mantiques permettent d’\u00e9conomiser de la m\u00e9moire, aussi bien que d’impl\u00e9menter des versions enti\u00e8rement g\u00e9om\u00e9triques d’algorithmes probabilistes, comme celui de Viterbi. De plus, des \u00e9vidences seront pr\u00e9sent\u00e9es en faveur de propri\u00e9t\u00e9s potentiellement utiles issues de la repr\u00e9sentation g\u00e9om\u00e9trique des mod\u00e8les de Markov, telles que les analogies, les super-\u00e9tats (agr\u00e9gations) et les champs s\u00e9mantiques.<\/p>\n\n\n\n
Biographie: <\/strong><\/p>\n\n\n\nJugurta Montalv\u00e3o – professeur chercheur de l’Universit\u00e9 F\u00e9d\u00e9rale de Sergipe, au Br\u00e9sil, sp\u00e9cialis\u00e9 en traitement num\u00e9rique du signal et reconnaissance de formes. Titulaire d’un dipl\u00f4me de doctorat en \u00ab Automatique et Traitement du Signal \u00bb de l’Universit\u00e9 Paris XI (Orsay, 2000), aussi bien que d’ing\u00e9nieur \u00e9lectronique, par l’Universit\u00e9 f\u00e9d\u00e9rale de Para\u00edba (Campina Grande, 1992) et de \u00ab\u00a0mestrado,\u00a0\u00bb aussi en \u00e9lectronique, par l’Universit\u00e9 d’\u00c9tat de Campinas, UNICAMP (Campinas, 1995). \u00c0 pr\u00e9sent, ses travaux portent notamment sur l’\u00e9tude des sous-espaces math\u00e9matiques associ\u00e9s \u00e0 la repr\u00e9sentation des signaux, en mettant l’accent sur leurs propri\u00e9t\u00e9s, telles que leurs dimensions intrins\u00e8ques et leurs entropies diff\u00e9rentielles.<\/p>\n","protected":false},"excerpt":{"rendered":"
S\u00e9minaire ARMEDIA: Repr\u00e9sentation des cha\u00eenes de Markov sous la forme des espaces s\u00e9mantiques, pr\u00e9sent\u00e9 par Jugurta Montalv\u00e3o, Professeur \u00e0 Federal University of Sergipe, Aracaju, Br\u00e9sil, le 2\/10 \u00e0 14h00, en salle 4A467 \u00e0 IMT Palaiseau batiment A 4eme \u00e9tage et sur le lien zoom suivant: https:\/\/telecom-paris.zoom.us\/j\/95835318578?pwd=73H9bqGHOI1nja9lkhanrvCy50sAnM.1 ID de r\u00e9union:\u00a0958 3531 8578Code secret: 385220 Speaker : […]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"","ocean_second_sidebar":"","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"","ocean_custom_header_template":"","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"","ocean_menu_typo_font_family":"","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"default","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"","ocean_post_oembed":"","ocean_post_self_hosted_media":"","ocean_post_video_embed":"","ocean_link_format":"","ocean_link_format_target":"self","ocean_quote_format":"","ocean_quote_format_link":"post","ocean_gallery_link_images":"on","ocean_gallery_id":[],"footnotes":""},"categories":[286,169],"tags":[],"class_list":["post-6899","post","type-post","status-publish","format-standard","hentry","category-fractualites-ennews-fr","category-seminaires-armedia","entry"],"_links":{"self":[{"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/posts\/6899","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/comments?post=6899"}],"version-history":[{"count":4,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/posts\/6899\/revisions"}],"predecessor-version":[{"id":6905,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/posts\/6899\/revisions\/6905"}],"wp:attachment":[{"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/media?parent=6899"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/categories?post=6899"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/tags?post=6899"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}