Robertson, S.E.; Sparck Jones, K.: Relevance weighting of search terms (1976)
0.00
0.0047037303 = product of:
0.023518652 = sum of:
0.023518652 = weight(_text_:information in 71) [ClassicSimilarity], result of:
0.023518652 = score(doc=71,freq=6.0), product of:
0.08751074 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.049850095 = queryNorm
0.2687516 = fieldWeight in 71, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.0625 = fieldNorm(doc=71)
0.2 = coord(1/5)
- Abstract
- Examines statistical techniques for exploiting relevance information to weight search terms. These techniques are presented as a natural extension of weighting methods using information about the distribution of index terms in documents in general. A series of relevance weighting functions is derived and is justified by theoretical considerations. In particular, it is shown that specific weighted search methods are implied by a general probabilistic theory of retrieval. Different applications of relevance weighting are illustrated by experimental results for test collections
- Source
- Journal of the American Society for Information Science. 27(1976), S.129-146
