{"id":216,"date":"2024-10-24T11:16:34","date_gmt":"2024-10-24T09:16:34","guid":{"rendered":"https:\/\/pole-acs.lis-lab.fr\/?p=216"},"modified":"2024-10-25T11:14:39","modified_gmt":"2024-10-25T09:14:39","slug":"salim-zekraoui-et-anes-lazri","status":"publish","type":"post","link":"https:\/\/pole-acs.lis-lab.fr\/?p=216","title":{"rendered":"Salim Zekraoui et Anes Lazri"},"content":{"rendered":"\n<h2 class=\"wp-block-heading has-medium-font-size\">Vendredi 8 novembre 9h, Saint-J\u00e9r\u00f4me<\/h2>\n\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\">Anes Lazri, L2S, Universit\u00e9 Paris Saclay, lien <a href=\"https:\/\/scholar.google.com\/citations?user=l07Iu4oAAAAJ&amp;hl=fr\">Scholar<\/a> <\/h2>\n\n\n\n<p><strong>Titre :<\/strong> Analyse et contr\u00f4le de la synchronisation dans les r\u00e9seaux de syst\u00e8mes complexes<\/p>\n\n\n\n<p><strong>R\u00e9sum\u00e9 : <\/strong><br>Les r\u00e9seaux complexes sont omnipr\u00e9sents dans notre quotidien, qu&rsquo;il<br>s&rsquo;agisse de r\u00e9seaux \u00e9lectriques, de r\u00e9seaux sociaux ou encore de<br>r\u00e9seaux biologiques. Ces r\u00e9seaux interconnectent de nombreux syst\u00e8mes<br>individuels, cr\u00e9ant ainsi des interactions qui influencent leur<br>comportement collectif. En plus de la dynamique propre \u00e0 chaque<br>syst\u00e8me, une dynamique collective \u00e9merge, donnant lieu \u00e0 des<br>ph\u00e9nom\u00e8nes tels que la synchronisation ou le regroupement en clusters.<\/p>\n\n\n\n<p>Lors de ce s\u00e9minaire, nous aborderons deux aspects majeurs influen\u00e7ant<br>la synchronisation : la force des interconnexions et la topologie du<br>r\u00e9seau. Nous explorerons comment ces facteurs impactent la dynamique<br>des r\u00e9seaux de syst\u00e8mes complexes, notamment dans des sc\u00e9narios o\u00f9 :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Le r\u00e9seau est partitionn\u00e9 en plusieurs groupes capables de communiquer entre eux, permettant \u00e0 ces groupes de former des \u00ab\u00a0macro-noeuds\u00a0\u00bb qui peuvent atteindre un comportement commun ou un consensus ;<\/li>\n\n\n\n<li>Les couplages entre n\u0153uds ne sont pas suffisamment forts pour garantir une synchronisation compl\u00e8te, entra\u00eenant l&rsquo;\u00e9mergence de clusters distincts au sein du r\u00e9seau.<\/li>\n<\/ul>\n\n\n\n<p>Nous examinerons ces ph\u00e9nom\u00e8nes avec un certain degr\u00e9 de<br>g\u00e9n\u00e9ralit\u00e9, mais aussi \u00e0 travers des exemples concrets tels que les<br>r\u00e9seaux d&rsquo;oscillateurs. Le but de cette pr\u00e9sentation est de discuter<br>des algorithmes de contr\u00f4le et des outils d&rsquo;analyse permettant<br>d&rsquo;assurer la synchronisation et le consensus dans ces r\u00e9seaux. Nous<br>mettrons \u00e9galement en lumi\u00e8re des cas particuliers o\u00f9 le<br>multi-consensus \u00e9merge, et nous analyserons diff\u00e9rents types de<br>topologies et de connexions dans ce contexte.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\">Salim Zekraoui, LAGEPP, Universit\u00e9 Lyon 1, lien <a href=\"https:\/\/scholar.google.com\/citations?hl=fr&amp;user=GEVYik8AAAAJ&amp;view_op=list_works&amp;sortby=pubdate\">Scholar<\/a><\/h2>\n\n\n\n<p><strong>Titre :<\/strong> Finite-time control of LTI\/PDE systems with input delay using a PDE-based approach.<\/p>\n\n\n\n<p><strong>Abstract : <\/strong><br>Time-delay systems are ubiquitous in control engineering. As time delays may cause performance degradation or instability of the closed-loop system, control design becomes a central issue; however, due to the infinite-dimensional nature of those systems, control continues to be challenging. Moreover, in many applications, like rendezvous and missile guidance, the transient process must occur within a given time while also managing the effect of the delay. The need to meet these time constraints and to increase temporal performance has motivated non-asymptotic stabilization (stabilization + convergence in finite time). In this talk, we will focus on the non-asymptotic stabilization of some classes of infinite-dimensional systems, namely LTI systems with input delays and reaction-diffusion PDEs with boundary input delays, utilizing a PDE backstepping-based approach. The approach consists mainly of rewriting the initial delayed LTI\/PDE system as an ODE\/PDE-PDE cascade system; and then transforming the resulting cascaded system, using an invertible transformation, into a well-chosen non-asymptotically stable target system. We show that the inverse transformation transfers the non-asymptotic stability property back to the initial ODE\/PDE-PDE cascade system.&nbsp;<\/p>\n\n\n\n<p>In addition, we consider the problem of boundary state-dependent finite\/fixed-time stabilization of reaction-diffusion PDEs. To the best of our knowledge, this problem has remained open in the literature for a considerable long time. We tackled this challenging problem using classical methods related to Control Lyapunov functions.<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Vendredi 8 novembre 9h, Saint-J\u00e9r\u00f4me Anes Lazri, L2S, Universit\u00e9 Paris Saclay, lien Scholar Titre : Analyse et contr\u00f4le de la synchronisation dans les r\u00e9seaux de syst\u00e8mes complexes R\u00e9sum\u00e9 : Les r\u00e9seaux complexes sont omnipr\u00e9sents dans notre quotidien, qu&rsquo;ils&rsquo;agisse de r\u00e9seaux \u00e9lectriques, de r\u00e9seaux sociaux ou encore der\u00e9seaux biologiques. Ces r\u00e9seaux interconnectent de nombreux syst\u00e8mesindividuels, cr\u00e9ant &hellip; <a href=\"https:\/\/pole-acs.lis-lab.fr\/?p=216\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Salim Zekraoui et Anes Lazri<\/span><\/a><\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-216","post","type-post","status-publish","format-standard","hentry","category-non-classe"],"_links":{"self":[{"href":"https:\/\/pole-acs.lis-lab.fr\/index.php?rest_route=\/wp\/v2\/posts\/216","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pole-acs.lis-lab.fr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pole-acs.lis-lab.fr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pole-acs.lis-lab.fr\/index.php?rest_route=\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/pole-acs.lis-lab.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=216"}],"version-history":[{"count":4,"href":"https:\/\/pole-acs.lis-lab.fr\/index.php?rest_route=\/wp\/v2\/posts\/216\/revisions"}],"predecessor-version":[{"id":224,"href":"https:\/\/pole-acs.lis-lab.fr\/index.php?rest_route=\/wp\/v2\/posts\/216\/revisions\/224"}],"wp:attachment":[{"href":"https:\/\/pole-acs.lis-lab.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=216"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pole-acs.lis-lab.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=216"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pole-acs.lis-lab.fr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=216"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}