Robertson, M.; Willett, P.: ¬An upperbound to the performance of ranked output searching : optimal weighting of query terms using a genetic algorithms (1996)
0.00
0.0013976095 = product of:
0.006988047 = sum of:
0.006988047 = weight(_text_:e in 6977) [ClassicSimilarity], result of:
0.006988047 = score(doc=6977,freq=2.0), product of:
0.055003747 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.03826694 = queryNorm
0.12704675 = fieldWeight in 6977, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.0625 = fieldNorm(doc=6977)
0.2 = coord(1/5)
- Language
- e
