Philgoo Han writeup of Klein and Manning

From Cohen Courses
Revision as of 10:42, 3 September 2010 by WikiAdmin (talk | contribs) (1 revision)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigationJump to search

This is a review of Klein_2002_conditional_structure_versus_conditional_estimation_in_nlp_models by user:Ironfoot.

  • Where is the perfomance comming from, the structure, objective function or the feature selection.
  • Different objective functions (loss function)
    • Joint likelihood
    • Conditional likelihood: This must be something like logistic regression?
    • Sum of conditional likelihood
    • Any other important objectives?
  • Scoring
    • Accurcacy : Why use this specific scoring?
  • Optimization
    • What is a deficient model? Probability may not sum up to 1?
    • How do you know a certain local optima is global in actual?
  • Result
    • CL is generally better than JL
      • Any tunning possible for rare observations in JL?
      • Can we make a criterion depending on the data(feature) without actually testing both?


  • Different model structure
    • HMM
      • Objective function: JL, CL
    • CMM
      • Observation bias
      • Label bias is not much likely to occur