Formalization and Models for Information Retrieval

Modelling an Information Retrieval Systems (IRS) consists on building a formal description of an IRS module (Analysis, Indexing, Matching, or Ranking). This modelling activity is essential to understand the behavior of existing IRS, and it can be a way to proposed alternative and better IRS solutions. We work on modelling the matching and ranking IRS activity by using logical models. The use of logic for this modelling, rises from the following hypothesis:

A document is an answer to a query, if there exists a logical deduction chain that starts from the document and ends to the query.

This deduction chain can be a fuzzy one, i.e. a probability to deduce the query from the documents and used for ranking. We have proposed a new IR logic matching model using logical Boolean lattice mixed with a probabilistic function over this lattice.This modelling enables matching functions to be decomposed into a direct matching function (deduction from the document to the query), and a reverse matching function, that evaluate the strength of the deduction from the query to the document. Moreover we have shown that most IR matching function can be decomposed into these two more basic matching functions. This work as conducted to a PhD thesis (Mr. Abdulahhad), and as also being published as short paper in the top conference ACM-SIGIR 2013.

Laboratoire d'Informatique de Grenoble
Bâtiment IMAG
700 avenue Centrale
CS 40700, 38058 Grenoble Cedex 9 - France
Phone: +33 4 57 42 15 48
Group Leader: Georges QUÉNOT

Ph.D. defense of Mateusz Budnik on 24 February 2017.

We're organizing the 40th European Conference ot Information Retrieval (ECIR) in march 2018

We've organizing the 2nd SIGIR workshop on medical information retrieval

Ph.D. defense of Isaac-Bernardo Caicedo-Castro on 12 May 2015.

Ph.D. defense of Pathathai Na-Lumpoon on 12 May 2015.

Le projet FUI GUIMUTEIC co-labélilsé par Minalogic et Imaginove a été retenu, octobre 2014

Ph.D. defense of Abdelkader Hamadi on 23 October 2014.

Organization of École d'Automne en Recherche d’Information Et Applications. 15-17 Octobre 2014.

Ph.D. defense of Nadia Derbas on 30 September 2014.

Recruitement of Associate Professor Lorraine Gœuriot at UJF in september 2014.