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. VIw62 Res[OCRerr][OCRerr]t for Cuery No. 12 Q![OCRerr] alOURNAL Docui[OCRerr]nt R[OCRerr]nk No. Name Relevant Correlation 1 4' 307?0M[OCRerr] OF;' x .6[OCRerr]956980 2 [OCRerr].0 1lC2CFN[OCRerr]RAiJI . 3825[OCRerr]603 3 19 302P.[OCRerr]C0RDIITG 30Q96[OCRerr]63 L [OCRerr].6 109STATU[OCRerr][OCRerr] R? . 2977![OCRerr]567 5 60 1212[OCRerr]0WARD A .2[OCRerr][OCRerr]9[OCRerr][OCRerr]897 6 10 12QiACCRDD17 .20[OCRerr]l2[OCRerr]15 7 S-j l10[OCRerr][OCRerr] AIY'0 .20[OCRerr]l2[OCRerr]15 F;' 5 20IA SY[OCRerr]T[OCRerr]i .20l3[OCRerr]682 9 1[OCRerr]3 l206TH[OCRerr] [OCRerr]DUC .19658927 10 21 1209SC[OCRerr]TC .1723[OCRerr]550 11 35 lOCLD ITSI 1 .16823165 12 1.3 lll9[OCRerr] C[OCRerr] A . l6[OCRerr] 39899 1:," 57 [OCRerr] .l63063[OCRerr]2 1[OCRerr]i. 2i[OCRerr] l[OCRerr]15 CRADU .15861032 15 8 [OCRerr]o[OCRerr]o .1')7131+81[OCRerr] ?.an'[OCRerr]n[OCRerr] took o565[OCRerr] econas Relevant Document Ranks Document [OCRerr] ic. [OCRerr]ame Relevant Correlation 1 [OCRerr] 30[OCRerr]0LB OF;' X .64956980 16 7 21IA C0;.*[OCRerr]2? x . 1[OCRerr]907l20 17 9 206ANAL[OCRerr]I3 x . 1)[OCRerr]6647l2 25 25 PC9m.[OCRerr] RDDUC X .106298S0 33 *`i2 203i[OCRerr]q ?:[OCRerr]`[OCRerr]`0 X .0Q[OCRerr]7ll56l lormalizea- ?eeall = .8cr:.5641 Normalized Precision = .5599956 Rank Recall = .1630 Lo Precision = .3886 `TF[OCRerr]GI[OCRerr](I) Query(1) = Qucij'(0) + Alpha [OCRerr] (1) * Document of Rani I 1=1 Document Rank 1 2 3 [OCRerr] 5 6 7 8 9 10 11 12 13 1[OCRerr] 15 Neight 100000000000000 N = Number of retrieved documents Alpha = 1 (a) Initial Results (Increasing Alpha Strategy) Comparison of Results After r.Th.ree Iterations as a Function of the Value of Alpha used in First Update Cosine Correlation Function Figure 12