News Feed

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

DevShed: The Active Record Pattern, Concluded

Marco Pivetta: Accessing private PHP class members without reflection

Johannes Schluter's Blog: Escaping from the statement mess

Enterprise PHP Magazine: How Many Perl, PHP, Python and Ruby Developers Are There? Introduction to using Google's search API

Community Events

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

install symfony library security voicesoftheelephpant version podcast community composer framework language release series interview opinion introduction laravel package application update

All content copyright, 2014 :: - Powered by the Solar PHP Framework