Losee, R.M.; Paris, L.A.H.: Measuring search-engine quality and query difficulty : ranking with Target and Freestyle (1999)
0.07
0.06607349 = product of:
0.13214698 = sum of:
0.13214698 = product of:
0.26429397 = sum of:
0.26429397 = weight(_text_:r.m in 4310) [ClassicSimilarity], result of:
0.26429397 = score(doc=4310,freq=2.0), product of:
0.2963294 = queryWeight, product of:
6.727074 = idf(docFreq=143, maxDocs=44218)
0.044050265 = queryNorm
0.89189243 = fieldWeight in 4310, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
6.727074 = idf(docFreq=143, maxDocs=44218)
0.09375 = fieldNorm(doc=4310)
0.5 = coord(1/2)
0.5 = coord(1/2)