News Feed
Sections




News Archive
Looking for more information on how to do PHP the right way? Check out PHP: The Right Way

Ian Barber's Blog:
Alternative Term Weighting
November 09, 2009 @ 12:24:36

In this new post from Ian Barber he takes a look at something that can come in very handy when you need something a bit more complex than the standard search results - term weighting.

The term weighting and ranking function is at the core of any information retrieval system. The vector space model with the cosine similarity is maybe the best known and most widely used, but there are plenty of alternatives. We're looking at two here, the BM25 function based around a probabilistic model, and a function based around language modeling.

He's put together a few examples on some basic weighting practices - simple string evaluation based on word occurrence, using the Okapi/BM25 method and language modeling with a little bit of probability and scoring involved.

0 comments voice your opinion now!
alternative term weighting search


blog comments powered by Disqus

Similar Posts

IBM developerWorks: Create a Yahoo! SearchMonkey application

PHPClasses.org: PHP Zeitgeist 2010: What PHP developers have been looking for in the last year?

Joshua Thijssen's Blog: Bloom Filters

Rob Allen's Blog: Luke - Lucene Index Toolbox

Jeroen van Dijk: Multi-select faceting in Solr with Solarium


Community Events





Don't see your event here?
Let us know!


deployment laravel package list release symfony series introduction tips framework language podcast interview bugfix opinion voicesoftheelephpant library install community api

All content copyright, 2014 PHPDeveloper.org :: info@phpdeveloper.org - Powered by the Solar PHP Framework