Un algorithme multi-SOM amélioré
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Les m�thodes de regroupement visent � obtenir des partitions homog�nes d'objets tout en favorisant l'h�t�rog�n�it� entre ces partitions. Chaque approche de regroupement, qu'elle soit hi�rarchique, par partitionnement ou neuronale, pr�sente finalement ses avantages et ses limites. Nous nous concentrons sur les m�thodes neuronales, car elles surmontent les limites des m�thodes hi�rarchiques et de partitionnement et constituent les approches de regroupement les plus appropri�es pour un grand nombre de donn�es. Dans ce travail, nous proposons un algorithme multi-SOM utilisant un crit�re d'�valuation diff�rent. Il est donc n�cessaire de passer en revue les mesures d'�valuation propos�es dans la litt�rature. N�anmoins, la m�thode multi-SOM, malgr� sa force et son efficacit� dans la d�limitation des clusters, pr�sente �galement une limite au niveau de la condition d'arr�t.
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