Rachid Ahmed-Ouamer

Learn More
RÉSUMÉ. Pour satisfaire les besoins d'informations d'un utilisateur et la personnalisation de O¶LQIRUPDWLRQ O HPSORL GX SURILO XWLOLVDWHXU D pWp DGRSWp &HFL HQJHQGUH OH SUREOqPH G¶pYROXWLRQ GH FH SURILO DX FRXUV GX WHPSV 'DQV FH SDSLHU HVW SURSRVp XQ PRGqOH G¶pYROXWLRn du profil utilisateur en se basant sur les réseaux Bayésiens temporels. Ce modèle est le(More)
Nowadays, resources on the web increase considerably. In this immense data warehouse, current information retrieval systems do not allow users to obtain results to their requests that meet exactly their needs. Mainly this is due to indexing techniques used (key words, thesaurus). In order to improve the relevance of information retrieval, an ontology-based(More)
RÉSUMÉ. De nos jours, les ressources disponibles sur le web augmentent considérablement. Dans cet immense entrepôt de données, les systèmes de recherche d’information actuels ne permettent pas de retourner aux utilisateurs les documents répondant exactement à leurs besoins exprimés par une requête sur une collection de documents. Cela est dû, en grande(More)
Nowadays, resources on the web increase considerably. In this immense data warehouse, current information retrieval systems do not allow users to obtain results to their requests that meet exactly their needs. Mainly this is due to indexing techniques used (key words, thesaurus). In order to improve the relevance of information retrieval, we propose in this(More)
Most traditional information retrieval systems are based on single terms indexing. However, it is admitted that semantic content of a document (or a query) cannot be accurately captured by a simple set of independent keywords. Although, several works have incorporated phrases or other syntactic information in IR, such attempts have shown slight benefit, at(More)
RÉSUMÉ. Dans cet article nous présentons une nouvelle technique de reformulation de requête. Cette technique considère la requête comme un ensemble de termes composés et un ensemble de termes simples. Pour déterminer les termes d'expansion on additionne les poids des relations d'un terme candidat avec chacun des termes de la requête (simple, composé). Un(More)
In the web personalization how to represent user profile is one of the key issues. The user profile refers to his/her interests which change over time. This paper, presents a personalized search approach for representation and evolution of the user profile, based on dynamic bayesian network. The theoretical framework provided by these networks allows to(More)
Many educational and training institutions acquired proprietary e-Learning systems which are tailored-made and difficult to reuse in the development process of new systems. This paper aims to look into the issue of reusability of the functionalities in the e-Learning domain. The functionalities that span across many e-Learning systems (common(More)
Most existing Information Retrieval model including probabilistic and vector space models are based on the term independence hypothesis. To go beyond this assumption and thereby capture the semantics of document and query more accurately, several works have incorporated phrases or other syntactic information in IR, such attempts have shown slight benefit,(More)
RÉSUMÉ. Plusieurs caractéristiques ont été utilisées pour estimer la probabilité a priori d’un document comme : la longueur du document, la structure des liens, le facteur temps. Cependant, ces caractéristiques dépendent seulement du document lui même. Or, dans le contexte du web une page web fait partie en général d’un site web. L’idée que nous explorons(More)