Hsieh-Yee, I.: ¬The retrieval power of selected search engines : how well do they address general reference questions and subject questions? (1998)
0.02
0.023949215 = product of:
0.04789843 = sum of:
0.04789843 = sum of:
0.0042112665 = weight(_text_:s in 2186) [ClassicSimilarity], result of:
0.0042112665 = score(doc=2186,freq=2.0), product of:
0.05008241 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.046063907 = queryNorm
0.08408674 = fieldWeight in 2186, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.0546875 = fieldNorm(doc=2186)
0.043687165 = weight(_text_:22 in 2186) [ClassicSimilarity], result of:
0.043687165 = score(doc=2186,freq=2.0), product of:
0.16130796 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.046063907 = queryNorm
0.2708308 = fieldWeight in 2186, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0546875 = fieldNorm(doc=2186)
0.5 = coord(1/2)
- Date
- 25.12.1998 19:22:51
- Source
- Reference librarian. 1998, no.60, S.27-47