Abstract

Introduction We continue our work in trec performing runs in adhoc, routing and part of the cross language track. The major investigations this year are the weight schemes modification to take into account the document length. We also experiment the high precision procedure in automatic adhoc environment by tuning the term weight parameters. 2 Mercure model Mercure is an information retrieval system based on a connexionist approach and modelled by a network (as shown in the figure 1) containing an input representing the query, a term layer representing the indexing terms, a document layer representing the documents and an output representing the retrieved documents. The term nodes (or neurons) are connected to the document nodes (or neurons) by weighted indexing links. Mercure includes the implementation of two main components : the query evaluation based on spreading activation from the input to the output through the indexing links and the automatic query mo

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