[TR-68] Implement Multinomial Field-based DFR Model Created: 16/Oct/09  Updated: 05/Mar/10  Resolved: 25/Feb/10

Status: Resolved
Project: Terrier Core
Component/s: .matching
Affects Version/s: 3.0
Fix Version/s: 3.0

Type: New Feature Priority: Minor
Reporter: Craig Macdonald Assignee: Craig Macdonald
Resolution: Fixed  
Labels: None

Issue Links:
Related

 Description   
See Vassilis' ECIR 2007 paper

 Comments   
Comment by Craig Macdonald [ 16/Oct/09 ]

Paper is at http://ir.dcs.gla.ac.uk/terrier/publications/fulltext_plachouras.pdf

Vassilis discussed two approximations of the multinomial model, which were called ML2 and ML_

{D}

2. The latter of these used Lancos approximation instead of using Stirling series to calcualte the factorials in ML2.

Comment by Craig Macdonald [ 25/Feb/10 ]

Ok. I have recoded to work in new version of fields. These will be committed to core in TREC-160.

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