ISR11
Scientific Report No. ISR-11 Information Storage and Retrieval
A Modified Two-Level Search Algorithm Using Request Clustering
chapter
V. R. Lesser
Harvard University
Gerard Salton
Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government.
VII-21
QUERY ID[OCRerr]TTIFICATION = QA15C
OF DOCU[OCRerr][OCRerr]NTS TO BE RETRIEVED = 9
ABOVE CUT-OFF CORFELATION = .300
USING MODIFIED T[OCRerr][OCRerr]-LEVEL SEARCH BASED ON DISTRIBUTION OF PREVIOUS QUERIES
CORRELATIONS OF QUERY VERSUS CLASSIFICATION VECTORS
CLASSIFICATION VECTOR QUERY CORRELATIOI[OCRerr]
2 .608
7 .4i8
1 337
8 .274
6 .i86
4 .182
.179
5 .149
H[OCRerr]VE SATISFIED SDARCH BY CHECKING 3 CATEGORIES
[OCRerr] A TOTAL [OCRerr][OCRerr]BE? OF DOCUMENTS = 29
RETRIEVED DOCUMENTS RANICED BY CORRELATION WITH QUERY
DOCUMENT NU[OCRerr][OCRerr]ER DOCU[OCRerr][OCRerr]ENT' IDENT. CORRELA[OCRerr]ION
47
62
11
37
1
1116R .573
809A .432
1117P .[OCRerr]26
306PR .424
llO[OCRerr]'T .386
51 IIiSS .349
43 1206T .341
27 5041s .333
12 1113T .302
Exanpie of Document Retrieval in the Modified
Querying Sy[OCRerr]tem
Figure 2