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Table 1 Meta-Features of Runs

From: A robust approach to optimizing multi-source information for enhancing genomics retrieval performance

Meta-Feature Description
FusionIR fusion - combining results from 2 or more systems regardless of fusion operator used
OkapiIR passage retrieval using an Okapi BM25 model
TfIdfIR passage retrieval using a vector space model with any variant of TF-IDF
LmIR passage retrieval using any language model
DfrIR passage retrieval using a vector space model with any variant of divergence from randomness (DFR)
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  1. In the TREC 2007 Genomics Track, submissions have employed multiple approaches for retrieval processes, such as query expansion, various levels of passage retrieval granularity, and varying IR models with many different scoring schemes. This table presents five typical and popular meta-features as follows.
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