Shaw, W.M.: Subject and citation indexing : pt.2: the optimal, cluster-based retrieval performance of composite representations (1991)
0.00
0.00496344 = product of:
0.034744076 = sum of:
0.006682779 = weight(_text_:information in 4842) [ClassicSimilarity], result of:
0.006682779 = score(doc=4842,freq=2.0), product of:
0.04306919 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.02453417 = queryNorm
0.1551638 = fieldWeight in 4842, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.0625 = fieldNorm(doc=4842)
0.028061297 = weight(_text_:retrieval in 4842) [ClassicSimilarity], result of:
0.028061297 = score(doc=4842,freq=4.0), product of:
0.07421378 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.02453417 = queryNorm
0.37811437 = fieldWeight in 4842, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0625 = fieldNorm(doc=4842)
0.14285715 = coord(2/14)
- Abstract
- Fortsetzung von pt.1: experimental retrieval results are presented as a function of the exhaustivity and similarity of the composite representations and reveal consistent patterns from which optimal performance levels can be identified. The optimal performance values provide an assessment of the absolute capacity of each composite representation to associate documents relevant to different queries in single-link hierarchies. The effectiveness of the exhaustive representation composed of references and citations is materially superior to the effectiveness of exhaustive composite representations that include subject descriptions
- Source
- Journal of the American Society for Information Science. 42(1991) no.9, S.676-684
