Bellardo, T.; Saracevic, T.: Online searching and search output : relationships between overlap, relevance, recall and precision (1987)
0.02
0.018919867 = product of:
0.037839733 = sum of:
0.037839733 = product of:
0.075679466 = sum of:
0.075679466 = weight(_text_:t in 4150) [ClassicSimilarity], result of:
0.075679466 = score(doc=4150,freq=4.0), product of:
0.20491594 = queryWeight, product of:
3.9394085 = idf(docFreq=2338, maxDocs=44218)
0.05201693 = queryNorm
0.36931956 = fieldWeight in 4150, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.9394085 = idf(docFreq=2338, maxDocs=44218)
0.046875 = fieldNorm(doc=4150)
0.5 = coord(1/2)
0.5 = coord(1/2)