Retrieval Modelling in Artificial Intelligence
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Questions and Answers

In the Boolean model framework, documents are composed of:

  • Sets of index terms
  • Probability distributions
  • Sets of documents (correct)
  • Vectors in a T-dimensional space

    • What is the primary purpose of index terms in a document?

  • To perform standard linear algebra operations on vectors
  • To provide a full text representation of the document
  • To apply Bayes' theorem for probabilistic modeling
  • To represent the theme of the document as a set of nouns (correct)

    • According to the Vector model framework, what kind of space is F composed of?

  • A set of index terms
  • A T-dimensional vectorial space (correct)
  • A probability distribution
  • A set of documents

    • What is the primary operation used in the Probabilistic model framework?

    <p>Standard probability operations</p> Signup and view all the answers

    How do search engines typically represent documents?

    <p>As a set of representative keywords or index terms</p> Signup and view all the answers

    What is a typical example of filtering retrieval?

    <p>A news wiring service</p> Signup and view all the answers

    What is the purpose of the ranking function R (qi, dj)?

    <p>To associate a real number with a query and a document representation</p> Signup and view all the answers

    What does the set Q represent in the IR model?

    <p>Set of user information needs</p> Signup and view all the answers

    What is the difference between filtering retrieval and other types of retrieval?

    <p>The stability of the user's information need</p> Signup and view all the answers

    What is the role of the framework F in the IR model?

    <p>To model document representations, queries, and their relationships</p> Signup and view all the answers

    What is the primary purpose of adopting index terms in IR systems?

    <p>To process queries and build an inverted file</p> Signup and view all the answers

    Why do users often get unsatisfied with IR systems?

    <p>Because users have no training in query formation</p> Signup and view all the answers

    What is the primary goal of ranking in IR systems?

    <p>To reflect the relevance of documents to the user query</p> Signup and view all the answers

    What is the main difference between ad hoc and filtering retrieval?

    <p>Ad hoc retrieval is used for a single query, while filtering is used for a stream of documents</p> Signup and view all the answers

    What is a fundamental premise of IR models regarding relevance?

    <p>All of the above</p> Signup and view all the answers

    What is the primary characteristic of filtering retrieval?

    <p>It uses a user profile to filter documents</p> Signup and view all the answers

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