Search (2 results, page 1 of 1)
- Did you mean:
- rvk_ss%3a%2000 76400 allgemeines %2f buch- und bibliothekswesen%2c informationswissenschaft %2f bibliothekswesen %2f bibliotheksbenutzung %2f auskunft%2c information%22 2
- rvk_ss%3a%2200 73400 allgemeines %2f buch- und bibliothekswesen%2c informationswissenschaft %2f bibliothekswesen %2f bibliotheksbenutzung %2f auskunft%2c information%22 2
- rvk_ss%3a%2200 76400 allgemeinen %2f buch- und bibliothekswesen%2c informationswissenschaft %2f bibliothekswesen %2f bibliotheksbenutzung %2f auskunft%2c information%22 2
- rvk_ss%3a%2200 76400 allgemeines %2f buch- und bibliothekswesen%2c informationswissenschaft %2f bibliothekswesen %2f bibliotheksbenutzung %2f auskunfts%2c information%22 2
- rvk_ss%3a%2200 76400 allgemeines %2f buch- und bibliothekswesen%2c informationswissenschaft %2f bibliothekswesen %2f bibliotheksbenutzung %2f auskünfte%2c information%22 2
-
Robertson, S.E.; Sparck Jones, K.: Relevance weighting of search terms (1976)
0.00
4.6749692E-4 = product of: 0.0070124534 = sum of: 0.0070124534 = product of: 0.014024907 = sum of: 0.014024907 = weight(_text_:information in 71) [ClassicSimilarity], result of: 0.014024907 = score(doc=71,freq=6.0), product of: 0.05218539 = queryWeight, product of: 1.7554779 = idf(docFreq=20772, maxDocs=44218) 0.02972717 = 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) 0.5 = coord(1/2) 0.06666667 = coord(1/15)
- 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
-
Vechtomova, O.; Karamuftuoglum, M.; Robertson, S.E.: On document relevance and lexical cohesion between query terms (2006)
0.00
2.8628221E-4 = product of: 0.004294233 = sum of: 0.004294233 = product of: 0.008588466 = sum of: 0.008588466 = weight(_text_:information in 987) [ClassicSimilarity], result of: 0.008588466 = score(doc=987,freq=4.0), product of: 0.05218539 = queryWeight, product of: 1.7554779 = idf(docFreq=20772, maxDocs=44218) 0.02972717 = queryNorm 0.16457605 = fieldWeight in 987, product of: 2.0 = tf(freq=4.0), with freq of: 4.0 = termFreq=4.0 1.7554779 = idf(docFreq=20772, maxDocs=44218) 0.046875 = fieldNorm(doc=987) 0.5 = coord(1/2) 0.06666667 = coord(1/15)
- Abstract
- Lexical cohesion is a property of text, achieved through lexical-semantic relations between words in text. Most information retrieval systems make use of lexical relations in text only to a limited extent. In this paper we empirically investigate whether the degree of lexical cohesion between the contexts of query terms' occurrences in a document is related to its relevance to the query. Lexical cohesion between distinct query terms in a document is estimated on the basis of the lexical-semantic relations (repetition, synonymy, hyponymy and sibling) that exist between there collocates - words that co-occur with them in the same windows of text. Experiments suggest significant differences between the lexical cohesion in relevant and non-relevant document sets exist. A document ranking method based on lexical cohesion shows some performance improvements.
- Source
- Information processing and management. 42(2006) no.5, S.1230-1247