'Ir model' diaporamas de présentation

592 views • 49 slides

Application of Markov chains in an interactive information retrieval system

Application of Markov chains in an interactive information retrieval system. A brief introduction for people knowledgeable of Markov chains, but not information retrieval, and vice versa. Scenario. Need info to perform a task, but are uncertain about the utility of the documents ...

506 views • 40 slides

Information Retrieval Modeling

Information Retrieval Modeling. CS 652 Information Extraction and Integration. Introduction. IR systems usually adopt index terms to index documents & process queries Index term: a keyword or group of selected/related words any word (in general) Problems of IR based on index terms:

481 views • 37 slides

Information Retrieval Models

Information Retrieval Models. Retrieval Models. A retrieval model specifies the details of: Document representation Query representation Retrieval function Determines a notion of relevance. Notion of relevance can be binary or continuous (i.e. ranked retrieval ).

1.86k views • 19 slides