SP500215 Appendix B: System Features Appendix National Institute of Standards and Technology D. K. Harman BC. QUERY CONSThU[OCRerr]ON -- FEEDBACK (ADHOC) [OCRerr]TEM NAME [OCRerr] GE [OCRerr] CLARIT [ 151 [OCRerr] HNC [OCRerr] NYU [OCRerr] SYRACUSE (adhoc) No No iery Manual or [OCRerr] Automatic [OCRerr]rson doing feedback (*) b ____________ rime for complete feedback time (cpu seconds) < 1 second (only did one iteration C time (minutes) 10 min. riumber of iterations 1 age number of Documents teration 20 n number of Iterations N/A [OCRerr] number of Iterations N/A termines end of Iteration N/A k metbods used omatic Term Reweigbting ________________ _______________ _______________ _______________________ omatic Query ECpansion (+) ______________ _____________ ____________ Adding relevant [er automatic methods document context vectors in the query context vector nual Methods N/A [1 terms in relevant documents added [OCRerr]) only top X terms added (c) user selected terms added