Robertson, S.E.: ¬The probability ranking principle in IR (1977)
0.01
0.006865305 = product of:
0.04805713 = sum of:
0.012107591 = weight(_text_:information in 1935) [ClassicSimilarity], result of:
0.012107591 = score(doc=1935,freq=2.0), product of:
0.052020688 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.029633347 = queryNorm
0.23274569 = fieldWeight in 1935, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.09375 = fieldNorm(doc=1935)
0.03594954 = weight(_text_:retrieval in 1935) [ClassicSimilarity], result of:
0.03594954 = score(doc=1935,freq=2.0), product of:
0.08963835 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.029633347 = queryNorm
0.40105087 = fieldWeight in 1935, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.09375 = fieldNorm(doc=1935)
0.14285715 = coord(2/14)
- Footnote
- Wiederabgedruckt in: Readings in information retrieval. Ed.: K. Sparck Jones u. P. Willet. San Francisco: Morgan Kaufmann 1997. S.281-286.