La distance intertextuelle

Utilisation de la théorie des graphes et de la distance d'édition pour la recherche d'information sur documents XML

Information retrieval on semi-structured documents like XML (SIR) allows the user to narrow his search down to the document element level. Queries and semi-structured documents could be seen as hierarchically nested elements. We consider that their structural proximity could be evaluated over their trees similarity. Our SIR approach combines both content and structure scores, the latter being b...

Une distance hiérarchique basée sur la sémantique pour la comparaison d'histogrammes nominaux

Résumé. La plupart des distances entre histogrammes sont définies pour comparer des histogrammes ordonnés (dont les entités représentées sont totalement ordonnées) ou des histogrammes nominaux (dont les entités représentées ne peuvent pas être comparées). Cependant, il n’existe aucune distance qui permette de comparer des histogrammes nominaux dans lesquels il est possible de quantifier des val...

Analyse de forums dans la formation à distance

E-learning students’ fora were studied both manually and by computer. Physically distant students were asked to collaborate to write a program in small groups. Tutors evaluated the records of their discussions to assess the collaborative process and its phases. Discussions were also studied as a collective discourse directed by a goal. Computer parsing based on a discourse model was achieved. R...

Coûts de distance d'édition pour la Recherche d'Information XML

Structured information retrieval (SIR) on XML documents allows to retrieve focused parts of documents that match the user needs. These needs can be expressed throught content and structured queries, that as well as XML documents can be represented as trees. Our approach uses these trees through tree edit distance to estimate the relevance of XML elements. Tree edit distance is the minimum set o...

Etude sur la digestion pancratique de la caseine pour la production de la toxine tetanique