Improving Retrieval Performance by Relevance Feedback Gerard Salton; Chris Buckley Journal of the American Society for Information Science (1986-1998); Jun 1990; 41, 4; ABI/INFORM Global pg. 288
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Improving Retrieval Performance by Relevance Feedback
the years are examined briefly, and evaluation data are included to ... terms are deleted by reducing to 0 the weight of terms that were initially positive.