IRS13 Search Matching Functions 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. "`-39 A[OCRerr]UNT OF DICTIONARY TOTAL PERFORMANCE INCREASE OF (ADI CONCEPTS NE[ERIC OVER LOGICAL IN TEXT) DICTIONARY NORMED. NORMED. PRECISION AT RECALL: REC[OCRerr] PRECISION .2 .5 .8 Suffix `5' 7,615 -.O2[OCRerr]8 .O15[OCRerr] +e0363 +.0692 +.o4i[OCRerr] Stem 5,606 +.oo81[OCRerr] +.0325 +e0778 +.0755 +.0571 Thesaurus-i [OCRerr]4i +.0387 +.ii8i +.1874 +.2032 +.1003 Thesaurus-2 289 +.0890 +e1109 +.1037 +.0957 +.0867 Comparisons of performance increases from numeric to logical in four ADI dictionaries, using ADI text results with five measures of performance. Figure 2[OCRerr].