-
Fuhr, N.; Niewelt, B.: ¬Ein Retrievaltest mit automatisch indexierten Dokumenten (1984)
0.05
0.04789843 = product of:
0.09579686 = sum of:
0.09579686 = sum of:
0.008422533 = weight(_text_:s in 262) [ClassicSimilarity], result of:
0.008422533 = score(doc=262,freq=2.0), product of:
0.05008241 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.046063907 = queryNorm
0.16817348 = fieldWeight in 262, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.109375 = fieldNorm(doc=262)
0.08737433 = weight(_text_:22 in 262) [ClassicSimilarity], result of:
0.08737433 = score(doc=262,freq=2.0), product of:
0.16130796 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.046063907 = queryNorm
0.5416616 = fieldWeight in 262, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.109375 = fieldNorm(doc=262)
0.5 = coord(1/2)
- Date
- 20.10.2000 12:22:23
- Pages
- S.319-339
-
Hodges, P.R.: Keyword in title indexes : effectiveness of retrieval in computer searches (1983)
0.02
0.023949215 = product of:
0.04789843 = sum of:
0.04789843 = sum of:
0.0042112665 = weight(_text_:s in 5001) [ClassicSimilarity], result of:
0.0042112665 = score(doc=5001,freq=2.0), product of:
0.05008241 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.046063907 = queryNorm
0.08408674 = fieldWeight in 5001, 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=5001)
0.043687165 = weight(_text_:22 in 5001) [ClassicSimilarity], result of:
0.043687165 = score(doc=5001,freq=2.0), product of:
0.16130796 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.046063907 = queryNorm
0.2708308 = fieldWeight in 5001, 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=5001)
0.5 = coord(1/2)
- Date
- 14. 3.1996 13:22:21
- Source
- Special libraries. 74(1983) no.1, S. 56-60
-
Biebricher, P.; Fuhr, N.; Niewelt, B.: ¬Der AIR-Retrievaltest (1986)
0.00
0.0015040238 = product of:
0.0030080476 = sum of:
0.0030080476 = product of:
0.006016095 = sum of:
0.006016095 = weight(_text_:s in 4040) [ClassicSimilarity], result of:
0.006016095 = score(doc=4040,freq=2.0), product of:
0.05008241 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.046063907 = queryNorm
0.120123915 = fieldWeight in 4040, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.078125 = fieldNorm(doc=4040)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Pages
- S.127-143
-
Lochbaum, K.E.; Streeter, A.R.: Comparing and combining the effectiveness of latent semantic indexing and the ordinary vector space model for information retrieval (1989)
0.00
0.0012762066 = product of:
0.0025524131 = sum of:
0.0025524131 = product of:
0.0051048263 = sum of:
0.0051048263 = weight(_text_:s in 3458) [ClassicSimilarity], result of:
0.0051048263 = score(doc=3458,freq=4.0), product of:
0.05008241 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.046063907 = queryNorm
0.101928525 = fieldWeight in 3458, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.046875 = fieldNorm(doc=3458)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- A retrievalsystem was built to find individuals with appropriate expertise within a large research establishment on the basis of their authored documents. The expert-locating system uses a new method for automatic indexing and retrieval based on singular value decomposition, a matrix decomposition technique related to the factor analysis. Organizational groups, represented by the documents they write, and the terms contained in these documents, are fit simultaneously into a 100-dimensional "semantic" space. User queries are positioned in the semantic space, and the most similar groups are returned to the user. Here we compared the standard vector-space model with this new technique and found that combining the two methods improved performance over either alone. We also examined the effects of various experimental variables on the system`s retrieval accuracy. In particular, the effects of: term weighting functions in the semantic space construction and in query construction, suffix stripping, and using lexical units larger than a a single word were studied.
- Source
- Information processing and management. 25(1989) no.6, S. 665-676