MATRIX at the TREC 2005 robust track

Keyphrases

• Term Weighting 100%
• Poisson Model 66%
• Context Model 66%
• Pseudo-relevance Feedback 66%
• Selection Strategy 33%
• Model Use 33%
• Retrieval Model 33%
• Vector Space Model 33%
• Query Terms 33%
• WordNet 33%
• Query Set 33%
• Long Queries 33%
• Passage Retrieval 33%
• Term Selection 33%
• Model Adaptive 33%
• Probabilistic Setting 33%

Computer Science

• Relevance Feedback 100%
• Vector Space Models 50%
• Its-Context 50%
• Probabilistic Context 50%
• retrieval model 50%
• Term Weighting Schemes 50%
• Selection Process 50%