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. Results for Query No. 12 OAl2J0URI[OCRerr]AL Document Rank No. Name Relevant Correlation 1 1[OCRerr] 307R0LE OF/ x .99146269 2 40 11O2CENTRALI .34989921 3 19 3O2RECORDING .30969005 4 46 lO9STATUS RE .25531480 5 33 1l0171NFORL'[OCRerr] .22165517 6 17 3OIDOCUMENT .22003279 7 60 121220WARD A .21004201 8 81 l107THE AU[OCRerr]O .19837301 9 22 914THE RAB[OCRerr]D .18670401 10 71 lo8S[OCRerr]C[OCRerr]S .173689250 11 35 IO04DENSITY .16349177 12 32 90[OCRerr]CUME:I'TT .16114324 13 37 3O6FROGRESS .15403081 14 73 906I[OCRerr]CR0FILM .15244319 15 69 8l[OCRerr]UT0[OCRerr]AkTIC .15105098, Rankin& took .150000 seconds Relevant Document Ranks Document Rank No. Name Relevant Correlation 1 4 3OYROLE OF/ x 99146269 16 9 206A[OCRerr][OCRerr]LYsIs x .15089864 19 42 203NE[OCRerr]'[OCRerr] PHOTO X .14963301 28 7 21IA C0I'[OCRerr]TE X .10226200 31 25 209THE P[OCRerr]UC X .09115047 vI-67 Normalized Recall = .7948718 Normalized Precision = .5505320 Rank Recall = .1579 Log Precision = .3835 N [OCRerr][OCRerr]IGHT(I)[OCRerr] Document of Rank I Query(2) = Ouery(l) + Alpha [OCRerr] (1) 1=1 Document Rank 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Weight 100000000000000 N = Number of retrieved documents Alpha = 2 (f) Results after First Update (Constant Alpha Strate[OCRerr]) Figure 12 (continued)