CSIRO Routing and Ad-Hoc Experiments at TREC-6

TREC-3 Ad Hoc Retrieval and Routing Experiments using the WIN System

Automatic Routing and Ad-hoc Retrieval Using SMART: TREC 2

The Smart information retrieval project emphasizes completely automatic approaches to the understanding and retrieval of large quantities of text. We continue our work in the TREC 2 environment, performing both routing and ad-hoc experiments. The ad-hoc work extends our investigations into combining global similarities, giving an overall indication of how a document matches a query, with local ...

Okapi at TREC-5

City submitted two runs each for the automatic ad hoc, very large collection track, automatic routing and Chinese track; and took part in the interactive and ltering tracks. There were no very signi cant new developments; the same Okapi-style weighting as in TREC{3 and TREC{4 was used this time round, although there were attempts, in the ad hoc and more notably in the Chinese experiments, to ex...

Recent Experiments with INQUERY

Past TREC experiments by the University of Massachusetts have focused primarily on ad-hoc query creation. Substantial eeort was directed towards automatically translating TREC topics into queries, using a set of simple heuristics and query expansion. Less emphasis was placed on the routing task, although results were generally good. The Spanish experiments in TREC-3 concentrated on simple index...

Term importance, Boolean conjunct training, negative terms, and foreign language retrieval: probabilistic algorithms at TREC-5

The Berkeley experiments for TREC-5 extend those of TREC-4 in numerous ways. For routing retrieval we experimented with the idea of term importance in three ways -training on Boolean conjuncts of the most important terms, filtering with the most important terms, and, finally, logistic regression on presence or absence of those terms. For ad-hoc retrieval we retained the manual reformulations of...