Mattison, R.: Data warehousing and data mining for telecommunications (1997)
0.02
0.015235557 = product of:
0.07617778 = sum of:
0.07617778 = weight(_text_:r in 246) [ClassicSimilarity], result of:
0.07617778 = score(doc=246,freq=2.0), product of:
0.14877617 = queryWeight, product of:
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.044943977 = queryNorm
0.51202947 = fieldWeight in 246, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.109375 = fieldNorm(doc=246)
0.2 = coord(1/5)