-
Egghe, L.; Rousseau, R.: Averaging and globalising quotients of informetric and scientometric data (1996)
0.04
0.042194232 = product of:
0.084388465 = sum of:
0.084388465 = sum of:
0.04750981 = weight(_text_:l in 7659) [ClassicSimilarity], result of:
0.04750981 = score(doc=7659,freq=2.0), product of:
0.18031335 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.045365814 = queryNorm
0.26348472 = fieldWeight in 7659, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.046875 = fieldNorm(doc=7659)
0.03687865 = weight(_text_:22 in 7659) [ClassicSimilarity], result of:
0.03687865 = score(doc=7659,freq=2.0), product of:
0.15886335 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045365814 = queryNorm
0.23214069 = fieldWeight in 7659, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.046875 = fieldNorm(doc=7659)
0.5 = coord(1/2)
- Source
- Journal of information science. 22(1996) no.3, S.165-170
-
Egghe, L.; Rousseau, R.: Duality in information retrieval and the hypegeometric distribution (1997)
0.02
0.015836604 = product of:
0.031673208 = sum of:
0.031673208 = product of:
0.063346416 = sum of:
0.063346416 = weight(_text_:l in 647) [ClassicSimilarity], result of:
0.063346416 = score(doc=647,freq=2.0), product of:
0.18031335 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.045365814 = queryNorm
0.35131297 = fieldWeight in 647, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.0625 = fieldNorm(doc=647)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Egghe, L.; Rousseau, R.: ¬A theoretical study of recall and precision using a topological approach to information retrieval (1998)
0.02
0.015836604 = product of:
0.031673208 = sum of:
0.031673208 = product of:
0.063346416 = sum of:
0.063346416 = weight(_text_:l in 3267) [ClassicSimilarity], result of:
0.063346416 = score(doc=3267,freq=2.0), product of:
0.18031335 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.045365814 = queryNorm
0.35131297 = fieldWeight in 3267, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.0625 = fieldNorm(doc=3267)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Egghe, L.; Rousseau, R.: Topological aspects of information retrieval (1998)
0.01
0.013857029 = product of:
0.027714059 = sum of:
0.027714059 = product of:
0.055428118 = sum of:
0.055428118 = weight(_text_:l in 2157) [ClassicSimilarity], result of:
0.055428118 = score(doc=2157,freq=2.0), product of:
0.18031335 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.045365814 = queryNorm
0.30739886 = fieldWeight in 2157, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.0546875 = fieldNorm(doc=2157)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- Let (DS, DQ, sim) be a retrieval system consisting of a document space DS, a query space QS, and a function sim, expressing the similarity between a document and a query. Following D.M. Everett and S.C. Cater (1992), we introduce topologies on the document space. These topologies are generated by the similarity function sim and the query space QS. 3 topologies will be studied: the retrieval topology, the similarity topology and the (pseudo-)metric one. It is shown that the retrieval topology is the coarsest of the three, while the (pseudo-)metric is the strongest. These 3 topologies are generally different, reflecting distinct topological aspects of information retrieval. We present necessary and sufficient conditions for these topological aspects to be equal