ISR11 Relevance Feedback in an Information Retrieval System chapter W. Riddle T. Horwitz R. Dietz Harvard University Gerard Salton Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. VI-so Results for Que[OCRerr] No. 9 OA9A[OCRerr]LALYSIS Document Rank No. Name Relevant Correlation 1 [OCRerr] 30[OCRerr]0LE OF / .05[OCRerr]ol[OCRerr]7[OCRerr]7 2 7[OCRerr] 305THE USE U .01273911 3 31 207FRACTICAL 0 1£. [OCRerr]8 804coM[OCRerr][OCRerr]TERI 0 5 57 6O3COMPILATI 0 6 82 3O8MACHINE R X 0 7 15 61OCHARACTER - .01836796 8 25 209T}[OCRerr] REDUC - . 02[OCRerr][OCRerr]8198 9 13 II19RECENT A - .03039738 10 68 8llTHE RELAI - .03125382 ii [OCRerr]6 IO9STATUS RE - .03303192 12 So lOOIDESIGN 0 - . 0[OCRerr]91[OCRerr]283 13 75 20IA SYSTEM - .0372290[OCRerr] l[OCRerr] 18 l122STATE-OF - .03827795 15 28 506TNE ROLE - .0389[OCRerr][OCRerr]33 Ranking took .166667 seconds Relevant Document Ranks Document Rank_T No. Name Relevant Correlation 6 182 308MAC[OCRerr]TE R X 0 28_150 [OCRerr]18ENGLISH-L x -.06677806 Normalized Recall = .8086[OCRerr][OCRerr]20 Normalized Precision = .[OCRerr]535267 Rank Recall = .0882 Log Precision = .1353 1[OCRerr]T = + Alpha [OCRerr] * Document of Rank I Query(2) [OCRerr]uery(l) (1) 1=1 Document Rank 1 2 3 [OCRerr] 5 6 7 8 9 10 11 12 13 1[OCRerr] 15 Weight 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 N = Number of retrieved documents Alpha; = 2 (b) After First Update Figure 10 (continued)