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[Experiment] Rank with Okapi BM25 #86

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michelole opened this issue Jul 4, 2017 · 1 comment

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experiment reindex

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michelole commented Jul 4, 2017

This is part of #83 and somehow related to #71 (BM25 uses per-field field-length normalisation).

Some resources:
https://en.wikipedia.org/wiki/Okapi_BM25
https://www.elastic.co/guide/en/elasticsearch/guide/current/pluggable-similarites.html

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Reduce the weight of abstract size #71

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michelole commented Jul 17, 2017

BM25 is the default since Lucene 6 and (at least) ES 5.

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