IRS13
Scientific Report No. IRS-13 Information Storage and Retrieval
Document Length
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.
v-il
Request data appears in Figure 2.
[OCRerr]ent [OCRerr]l Non-Relevant is entitled: Analysis, indexing and correlation
of information.
Document [OCRerr]l looked-up in Thesaurus Dictionary
Concept Weight Concept Weight Concept Weight
Title only ( 1 1 33 1
([OCRerr] concepts)
1 296 1
1 1 33 1 128 1
1 36 1 1140 1
Abstract
19 1 142 1 267 1
(17 concepts)
20 1 148 1 286 1
22 1 51 2 296 1
32 2 66 1
Cosine Correlation Coefficients
1. Title only Cos = 2 - 0.11082
2
2. Abstract Cos = - 0.1703
Example of the change in cosine correlation between request QA8 (see Figure 2)
and non-relevant document 141, when title only is compared with abstract[OCRerr].
(ADI Collection, Thegaurus Dictionary)
Figure 3.