Reciprocal rank fusion | Elasticsearch Guide 8.13 | Elastic

Reciprocal Rank Fusion outperforms Condorcet and individual Rank Learning Methods

kを増やすと1位と2位の差が小さくなる

nishio

[Reciprocal rank fusion | Elasticsearch Guide 8.13 | Elastic https://www.elastic.co/guide/en/elasticsearch/reference/current/rrf.html]

[$ score_i = {1\over a_i} + {1\over b_i}]

	大小関係としては[調和平均]と同じ

		[https://gyazo.com/7fd3a17c5cc500f57a9a380e421765a1]

 		[Reciprocal Rank Fusion outperforms Condorcet and individual Rank Learning Methods https://plg.uwaterloo.ca/~gvcormac/cormacksigir09-rrf.pdf](PDF)

		kを増やすと1位と2位の差が小さくなる