How we utilized a variant of BM25 for sparse vector scoring and combined it with cosine similarity between dense vectors to achieve a hybrid ranking algorithm with better search performance than either technique alone, validated at TREC 2021
A guest post from the Metarank team write on field boosts, Learning to Boost and Learning to Rank
This week Relevance Slack, which OSC created a few years ago, hit the milestone of 1750 users. Relevance Slack was founded to give the growing search relevance community a…
How to use low level Lucene term statistics with Elasticsearch LTR plugin using TermStatQuery for feature engineering
Two weeks ago we ran our first ever virtual relevance conference – Haystack 2020, as part of a combined week of events including Berlin Buzzwords and MICES, the e-commerce…
When the COVID-19 crisis hit back in early March we were already planning our annual Haystack US conference – hoping to welcome 150 relevance specialists to Charlottesville in late…
In August’s Summer of Relevance we took 19 attendees through intense, small-class search relevance training workshops – including “Think Like a Relevance Engineer” and “Hello LTR – Learning to…
MICES is a one-day, free to attend event held in Berlin just after the Berlin Buzzwords conference – it’s a combination of talks and less formal discussion sessions, run…
I consume a lot of search materials: blogs, webinars, papers, and marketing collateral. There’s a consistent theme that crops up over the years: buzzwords! I understand why this happens,…
Did you miss Haystack? This summer, we’ll be fulfilling our mission of empowering search teams, showing you how it’s done with 100% open source tools, by holding a full…
I’ve already written about the first day of Haystack 2019, here’s a quick summary of the second day. We returned to the cinema, noted that Avengers Endgame was still…
You may remember I was ever so slightly enthusiastic about last year’s inaugural Haystack conference in Charlottesville, Virginia – it would perhaps be unseemly to be so effusive again,…
