Sparck Jones, K.; Jackson, D.M.: ¬The use of automatically obtained keyword classification for information retrieval (1970)
0.06
0.06453113 = product of:
0.25812453 = sum of:
0.17977181 = weight(_text_:storage in 5177) [ClassicSimilarity], result of:
0.17977181 = score(doc=5177,freq=2.0), product of:
0.1866346 = queryWeight, product of:
5.4488444 = idf(docFreq=516, maxDocs=44218)
0.034252144 = queryNorm
0.9632287 = fieldWeight in 5177, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.4488444 = idf(docFreq=516, maxDocs=44218)
0.125 = fieldNorm(doc=5177)
0.07835273 = weight(_text_:retrieval in 5177) [ClassicSimilarity], result of:
0.07835273 = score(doc=5177,freq=4.0), product of:
0.10360982 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.034252144 = queryNorm
0.75622874 = fieldWeight in 5177, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.125 = fieldNorm(doc=5177)
0.25 = coord(2/8)
- Source
- Information storage and retrieval. 5(1970), S.175-201
Sparck Jones, K.: Index term weighting (1973)
0.06
0.058793887 = product of:
0.23517555 = sum of:
0.17977181 = weight(_text_:storage in 5491) [ClassicSimilarity], result of:
0.17977181 = score(doc=5491,freq=2.0), product of:
0.1866346 = queryWeight, product of:
5.4488444 = idf(docFreq=516, maxDocs=44218)
0.034252144 = queryNorm
0.9632287 = fieldWeight in 5491, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.4488444 = idf(docFreq=516, maxDocs=44218)
0.125 = fieldNorm(doc=5491)
0.055403747 = weight(_text_:retrieval in 5491) [ClassicSimilarity], result of:
0.055403747 = score(doc=5491,freq=2.0), product of:
0.10360982 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.034252144 = queryNorm
0.5347345 = fieldWeight in 5491, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.125 = fieldNorm(doc=5491)
0.25 = coord(2/8)
- Source
- Information storage and retrieval. 9(1973), S.619-633
