IRS13
Scientific Report No. IRS-13 Information Storage and Retrieval
Word-Word Associations in Document Retrieval Systems
chapter
M. E. Lesk
Harvard University
Gerard Salton
Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government.
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PRECISION
I-C
0.6 -
O.E -
0.4 -
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Stem
Stem Concon (Frequency
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Abstract Stem Stem
Stem Concon
6-100, K--
Stem Concon (Frequency
6-100, K:0.45)
6-100, [OCRerr] 0.45)
PRECISION PRECISION
I C I.C -
0.6 - 0.E -
00½
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0.E
O[OCRerr][OCRerr]O0[OCRerr]0[OCRerr] QE -
--0[OCRerr]0[OCRerr]
0[OCRerr][OCRerr];00[OCRerr]o 0.4 -
0.2 - 0.2 -
0 0'.2 0.4 -RECALL
0.6 0.8 1.0
IRE- 3, 34 Requests
I I I I RECALL
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C. field-I, Abstracts, 42 Requests
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ADI, Full Text, 35 RequE
Comparison of word stem dictionary with addition of
Stati[OCRerr]tical Word-Word Association (Stem Concon).
Fig. 4