QACTIS Enhancements in TREC QA-2006

Abstract

The QACTIS system has been tested in previous years at the TREC Question Answering Evaluations. This paper describes new enhancements to the system specific to TREC-2006, including basic improvements and thresholding experiments, filtered and Internet-supported pseudo-relevance feedback for information retrieval, and emerging statistics-driven question-answering. For contrast, we also compare our TREC-2006 system performance to that of our top systems from TREC-2004 and TREC-2005 applied to this year's data. Lastly, we analyze evaluator-declared unsupportedness of factoids and nugget decisions of "other" questions to understand major negative changes in performance for these categories over last year.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2006
Accession Number
ADA463732

Entities

People

  • G. Ciany
  • J. Mayfield
  • P. Mcnamee
  • P. Schone
  • R. Cutts
  • Tom Smith

Organizations

  • United States Department of Defense

Tags

Communities of Interest

  • Autonomy
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Abstracts
  • Competition
  • Data Sets
  • Department Of Defense
  • Filtration
  • Information Retrieval
  • Internet
  • Language
  • Machine Learning
  • Physics Laboratories
  • Supervised Machine Learning
  • Test And Evaluation
  • Training

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Artificial Intelligence
  • Information Retrieval

Technology Areas

  • AI & ML
  • AI & ML - Information Retrieval