-
Cleverdon, C.W.: Evaluation tests of information retrieval systems (1970)
0.02
0.019623749 = product of:
0.08830687 = sum of:
0.023668459 = weight(_text_:of in 2272) [ClassicSimilarity], result of:
0.023668459 = score(doc=2272,freq=4.0), product of:
0.06054254 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.03871607 = queryNorm
0.39093933 = fieldWeight in 2272, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.125 = fieldNorm(doc=2272)
0.064638406 = weight(_text_:systems in 2272) [ClassicSimilarity], result of:
0.064638406 = score(doc=2272,freq=2.0), product of:
0.11898123 = queryWeight, product of:
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.03871607 = queryNorm
0.5432656 = fieldWeight in 2272, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.125 = fieldNorm(doc=2272)
0.22222222 = coord(2/9)
- Source
- Journal of documentation. 26(1970), S.55-67
-
Cleverdon, C.W.: Design and evaluation of information systems (1971)
0.02
0.019623749 = product of:
0.08830687 = sum of:
0.023668459 = weight(_text_:of in 248) [ClassicSimilarity], result of:
0.023668459 = score(doc=248,freq=4.0), product of:
0.06054254 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.03871607 = queryNorm
0.39093933 = fieldWeight in 248, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.125 = fieldNorm(doc=248)
0.064638406 = weight(_text_:systems in 248) [ClassicSimilarity], result of:
0.064638406 = score(doc=248,freq=2.0), product of:
0.11898123 = queryWeight, product of:
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.03871607 = queryNorm
0.5432656 = fieldWeight in 248, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.125 = fieldNorm(doc=248)
0.22222222 = coord(2/9)
- Source
- Annual review of information science and technology. 6(1971), S.41-74
-
Cleverdon, C.W.: On the inverse relationship of recall and precision (1972)
0.00
0.0026298289 = product of:
0.023668459 = sum of:
0.023668459 = weight(_text_:of in 1843) [ClassicSimilarity], result of:
0.023668459 = score(doc=1843,freq=4.0), product of:
0.06054254 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.03871607 = queryNorm
0.39093933 = fieldWeight in 1843, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.125 = fieldNorm(doc=1843)
0.11111111 = coord(1/9)
- Source
- Journal of documentation. 28(1972), S.195-201