Tseng, Y.-H.: Keyword extraction techniques and relevance feedback (1997)
0.01
0.008806311 = product of:
0.06164417 = sum of:
0.06164417 = weight(_text_:techniques in 1830) [ClassicSimilarity], result of:
0.06164417 = score(doc=1830,freq=2.0), product of:
0.18093403 = queryWeight, product of:
4.405231 = idf(docFreq=1467, maxDocs=44218)
0.04107254 = queryNorm
0.3406997 = fieldWeight in 1830, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.405231 = idf(docFreq=1467, maxDocs=44218)
0.0546875 = fieldNorm(doc=1830)
0.14285715 = coord(1/7)