Probabilistic ir - PowerPoint PPT Presentation

Information Retrieval

Information Retrieval. Lecture 11 Probabilistic IR. Recap of the last lecture. Improving search results Especially for high recall. E.g., searching for aircraft so it matches with plane; thermodynamic with heat Options for improving results… Global methods Query expansion Thesauri

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Chapter 4: Advanced IR Models

Chapter 4: Advanced IR Models. 4.1 Probabilistic IR 4.1.1 Principles 4.1.2 Probabilistic IR with Term Independence 4.1.3 Probabilistic IR with 2-Poisson Model (Okapi BM25) 4.1.4 Extensions of Probabilistic IR 4.2 Statistical Language Models 4.3 Latent-Concept Models.

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