CRANV2
Aslib Cranfield Research Project: Factors Determining the Performance of Indexing Systems: Volume 2
Main test results
chapter
Cyril Cleverdon
Michael Keen
Cranfield
An investigation supported by a grant to Aslib by the National Science Foundation.
Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government.
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0 tO 20
F1GURE 4.844P
\
30 40 50 60 70 80 90 ;OO
°Jo PP, ECISION
INDEX LANGUAGE III.5.a. SEARCH A (BROKEN LINE)
AND SEARCH E. 200 DOCUMENTS (FIGURES
4. 804T and 4. 814T)
iŠo
90 [OCRerr][OCRerr]
[OCRerr]0
60
-J
_J
(.9 SO
Ul
O\
\
Io
10 20
FIGURE 4.845P
o''-
30 40 50 60 70 8090 IOO
°/o PRECISION
INDEX LANGUAGE llI. 6.a. SEARCH A (BROKEN LINE)
AND SEARCH E. 200 DOCUMENTS (FIGURES
4.805T and 4.815T)