Cooper, W.S.: ¬On selecting a measure of retrieval effectiveness, revisited (1973)
0.02
0.021659832 = product of:
0.043319665 = sum of:
0.043319665 = product of:
0.08663933 = sum of:
0.08663933 = weight(_text_:p in 1930) [ClassicSimilarity], result of:
0.08663933 = score(doc=1930,freq=2.0), product of:
0.18174732 = queryWeight, product of:
3.5955126 = idf(docFreq=3298, maxDocs=44218)
0.050548375 = queryNorm
0.47670212 = fieldWeight in 1930, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5955126 = idf(docFreq=3298, maxDocs=44218)
0.09375 = fieldNorm(doc=1930)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Footnote
- Wiederabgedruckt in: Readings in information retrieval. Ed.: K. Sparck Jones u. P. Willett. San Francisco: Morgan Kaufmann 1997. S.191-204.