IRS13
Scientific Report No. IRS-13 Information Storage and Retrieval
Test Environment
chapter
E. M. Keen
Harvard University
Gerard Salton
Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government.
SPECIAL REQUESTS GE[OCRerr]ERAL REQUESTS
Cut-off, n Documents Cut-off, n Documents
[OCRerr]rmance fl 1 2 3 4 5 n 1 2 3 `4 5
.[OCRerr],...
eved 17 34 51 68 85 17 34 51 68 85
aened 12 21 27 32 38 14 24 37 48 61
elevant 5 13 24 36 47 3 10 14 20 24
eved
1 .09 .16 .21 .25 .30 .03 .05 .08 .10 .13
ut .00038 .00181 .00355 .00023 .00109 .00186
.00098 .00272 .00078 .00155
sion .71 .62 .53 .47 .45 .82 .71 .73 .71 .72
Collection, Abstracts, Stem Dictionary, Micro Averages over 17 Specific and 17 General Requests.
Compari[OCRerr]on of Specific and General Requests in the
IRE-3 Collection at the First Five Document Cut -offs
Fig. 16