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All fields Title Creator / Publisher Keyword Year AND OR AND NOT All fields Title Creator / Publisher Keyword Year AND OR AND NOT All fields Title Creator / Publisher Keyword Year AND OR AND NOT All fields Title Creator / Publisher Keyword Year AND OR AND NOT All fields Title Creator / Publisher Keyword Year Sort by creator [A → Z]' creator [Z → A]' publishing year ↑ (asc)' publishing year ↓ (desc)' title [A → Z]' title [Z → A]' Simple Search Hits 1 – 7 of 7 1 A Hybrid Approach for QA Track Definitional Questions Blair-Goldensohn, Sasha; McKeown, Kathleen R.; Schlaikjer, Andrew H. In: DTIC (2006) Abstract: This paper presents an overview of DefScriber, a hybrid goal-driven and data-driven system for definitional questions that was developed at Columbia University. DefScriber combines knowledge-based and statistical methods to answer definitional questions of the form, "What is X?" The authors explain how the system was modified and applied to answer definitional questions in the TREC 2003 QA track. They present DefScriber's results on the definitional questions, which were significantly above median, achieving an average F-score of .338 compared with the median of .192. Finally, they analyze their scores on certain individual questions, discussing areas in which their system performed well and areas in which it could be improved. ; The original document contains color images. Keyword: *ARTIFICIAL INTELLIGENCE; *COMPUTATIONAL LINGUISTICS; *COMPUTER PROGRAMS; *DEFINITIONAL QUESTIONS; *HYBRID SYSTEMS; *INFORMATION RETRIEVAL; *LEARNING MACHINES; *PATTERN RECOGNITION; *QUESTION AND ANSWER; ALGORITHMS; CLASSIFICATION; CLUSTERING; COHESION ORDERING; Computer Programming and Software; Cybernetics; DATA BASES; DEFINITIONAL PREDICATES; EXTRACTION; INDEX TERMS; Information Science; INTERNET; Linguistics; MACHINE LEARNING; MATCHING; MULTI-SENTENCE ANSWERS; NSD(NON-SPECIFIC DEFINITIONAL); PERFORMANCE(ENGINEERING); PREDICATE IDENTIFICATION; RIPPER ALGORITHM; SEARCH QUERIES; SEARCHING; SENTENCE CLUSTERING; SENTENCE SELECTION; SOFTWARE ARCHITECTURE; STATISTICAL ANALYSIS; SUMMARIZATION; SYNTAX; SYNTAX-TREE PATTERNS URL: http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA456354 http://www.dtic.mil/docs/citations/ADA456354 BASE Hide details 2 UML Design and Auto-Generated Code: Issues and Practical Solutions Lipkin, Ilya; Huber, A. K. In: DTIC (2005) BASE Show details 3 Science and Technology Text Mining: Cross-Disciplinary Innovation Kostoff, Ronald N. In: DTIC AND NTIS (2003) BASE Show details 4 Science and Technology Text Mining: Cross-Disciplinary Innovation Kostoff, Ronald N. In: DTIC AND NTIS (2003) BASE Show details 5 Decomposing Large, Complex, Concurrent Systems into Manageable Building Blocks Lynch, Nancy In: DTIC AND NTIS (2001) BASE Show details 6 A Survey of Current Paradigms in Machine Translation Dorr, Bonnie J.; Jordan, Pamela W.; Benoit, John W. In: DTIC (1998) BASE Show details 7 SENET Simulator User's Guide. Castello,D In: DTIC AND NTIS (1978) BASE Show details

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