-
Salton, G.; Araya, J.: On the use of clustered file organizations in information search and retrieval (1990)
0.07
0.071673915 = product of:
0.14334783 = sum of:
0.050096344 = weight(_text_:retrieval in 2409) [ClassicSimilarity], result of:
0.050096344 = score(doc=2409,freq=2.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.40105087 = fieldWeight in 2409, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.09375 = fieldNorm(doc=2409)
0.051335193 = weight(_text_:use in 2409) [ClassicSimilarity], result of:
0.051335193 = score(doc=2409,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.40597942 = fieldWeight in 2409, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.09375 = fieldNorm(doc=2409)
0.023188837 = weight(_text_:of in 2409) [ClassicSimilarity], result of:
0.023188837 = score(doc=2409,freq=6.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.3591007 = fieldWeight in 2409, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.09375 = fieldNorm(doc=2409)
0.018727465 = product of:
0.03745493 = sum of:
0.03745493 = weight(_text_:on in 2409) [ClassicSimilarity], result of:
0.03745493 = score(doc=2409,freq=4.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.4123903 = fieldWeight in 2409, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.09375 = fieldNorm(doc=2409)
0.5 = coord(1/2)
0.5 = coord(4/8)
- Imprint
- Edmonton, Alberta : Univ. of Alberta, Faculty of Extension
- Source
- Library classification and its functions. Int. Conf. on ..., 20.-21.6.1989, Edmonton, Alberta. Ed.: A. Nitecki u. T. Fell
-
Milstead, J.L.: Thesauri in a full-text world (1998)
0.06
0.060845025 = product of:
0.09735204 = sum of:
0.020873476 = weight(_text_:retrieval in 2337) [ClassicSimilarity], result of:
0.020873476 = score(doc=2337,freq=2.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.16710453 = fieldWeight in 2337, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0390625 = fieldNorm(doc=2337)
0.037047986 = weight(_text_:use in 2337) [ClassicSimilarity], result of:
0.037047986 = score(doc=2337,freq=6.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.29299045 = fieldWeight in 2337, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0390625 = fieldNorm(doc=2337)
0.017640345 = weight(_text_:of in 2337) [ClassicSimilarity], result of:
0.017640345 = score(doc=2337,freq=20.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.27317715 = fieldWeight in 2337, product of:
4.472136 = tf(freq=20.0), with freq of:
20.0 = termFreq=20.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0390625 = fieldNorm(doc=2337)
0.007803111 = product of:
0.015606222 = sum of:
0.015606222 = weight(_text_:on in 2337) [ClassicSimilarity], result of:
0.015606222 = score(doc=2337,freq=4.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.1718293 = fieldWeight in 2337, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0390625 = fieldNorm(doc=2337)
0.5 = coord(1/2)
0.013987125 = product of:
0.02797425 = sum of:
0.02797425 = weight(_text_:22 in 2337) [ClassicSimilarity], result of:
0.02797425 = score(doc=2337,freq=2.0), product of:
0.1446067 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.041294612 = queryNorm
0.19345059 = fieldWeight in 2337, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0390625 = fieldNorm(doc=2337)
0.5 = coord(1/2)
0.625 = coord(5/8)
- Abstract
- Despite early claims to the contemporary, thesauri continue to find use as access tools for information in the full-text environment. Their mode of use is changing, but this change actually represents an expansion rather than a contrdiction of their utility. Thesauri and similar vocabulary tools can complement full-text access by aiding users in focusing their searches, by supplementing the linguistic analysis of the text search engine, and even by serving as one of the tools used by the linguistic engine for its analysis. While human indexing contunues to be used for many databases, the trend is to increase the use of machine aids for this purpose. All machine-aided indexing (MAI) systems rely on thesauri as the basis for term selection. In the 21st century, the balance of effort between human and machine will change at both input and output, but thesauri will continue to play an important role for the foreseeable future
- Date
- 22. 9.1997 19:16:05
- Imprint
- Urbana-Champaign, IL : Illinois University at Urbana-Champaign, Graduate School of Library and Information Science
- Source
- Visualizing subject access for 21st century information resources: Papers presented at the 1997 Clinic on Library Applications of Data Processing, 2-4 Mar 1997, Graduate School of Library and Information Science, University of Illinois at Urbana-Champaign. Ed.: P.A. Cochrane et al
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Hersh, W.R.; Hickam, D.H.: ¬A comparison of two methods for indexing and retrieval from a full-text medical database (1992)
0.06
0.059102576 = product of:
0.11820515 = sum of:
0.058445733 = weight(_text_:retrieval in 4526) [ClassicSimilarity], result of:
0.058445733 = score(doc=4526,freq=8.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.46789268 = fieldWeight in 4526, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0546875 = fieldNorm(doc=4526)
0.029945528 = weight(_text_:use in 4526) [ClassicSimilarity], result of:
0.029945528 = score(doc=4526,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.23682132 = fieldWeight in 4526, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0546875 = fieldNorm(doc=4526)
0.022089208 = weight(_text_:of in 4526) [ClassicSimilarity], result of:
0.022089208 = score(doc=4526,freq=16.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.34207192 = fieldWeight in 4526, product of:
4.0 = tf(freq=16.0), with freq of:
16.0 = termFreq=16.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0546875 = fieldNorm(doc=4526)
0.007724685 = product of:
0.01544937 = sum of:
0.01544937 = weight(_text_:on in 4526) [ClassicSimilarity], result of:
0.01544937 = score(doc=4526,freq=2.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.17010231 = fieldWeight in 4526, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0546875 = fieldNorm(doc=4526)
0.5 = coord(1/2)
0.5 = coord(4/8)
- Abstract
- Reports results of a study of 2 information retrieval systems on a 2.000 document full text medical database. The first system, SAPHIRE, features concept based automatic indexing and statistical retrieval techniques, while the second system, SWORD, features traditional word based Boolean techniques, 16 medical students at Oregon Health Sciences Univ. each performed 10 searches and their results, recorded in terms of recall and precision, showed nearly equal performance for both systems. SAPHIRE was also compared with a version of SWORD modified to use automatic indexing and ranked retrieval. Using batch input of queries, the latter method performed slightly better
- Source
- Proceedings of the 55th Annual Meeting of the American Society for Information Science, Pittsburgh, 26.-29.10.92. Ed.: D. Shaw
-
Wacholder, N.; Byrd, R.J.: Retrieving information from full text using linguistic knowledge (1994)
0.06
0.056636915 = product of:
0.15103178 = sum of:
0.025048172 = weight(_text_:retrieval in 8524) [ClassicSimilarity], result of:
0.025048172 = score(doc=8524,freq=2.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.20052543 = fieldWeight in 8524, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.046875 = fieldNorm(doc=8524)
0.021168415 = weight(_text_:of in 8524) [ClassicSimilarity], result of:
0.021168415 = score(doc=8524,freq=20.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.32781258 = fieldWeight in 8524, product of:
4.472136 = tf(freq=20.0), with freq of:
20.0 = termFreq=20.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.046875 = fieldNorm(doc=8524)
0.10481519 = sum of:
0.018727465 = weight(_text_:on in 8524) [ClassicSimilarity], result of:
0.018727465 = score(doc=8524,freq=4.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.20619515 = fieldWeight in 8524, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.046875 = fieldNorm(doc=8524)
0.086087726 = weight(_text_:line in 8524) [ClassicSimilarity], result of:
0.086087726 = score(doc=8524,freq=2.0), product of:
0.23157367 = queryWeight, product of:
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.041294612 = queryNorm
0.37175092 = fieldWeight in 8524, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.046875 = fieldNorm(doc=8524)
0.375 = coord(3/8)
- Abstract
- Examines how techniques in the field of natural language processing can be applied to the analysis of text in information retrieval. State of the art text searching programs cannot distinguish, for example, between occurrences of the sickness, AIDS and aids as tool or between library school and school nor equate such terms as online or on-line which are variants of the same form. To make these distinction, systems must incorporate knowledge about the meaning of words in context. Research in natural language processing has concentrated on the automatic 'understanding' of language; how to analyze the grammatical structure and meaning of text. Although many asoects of this research remain experimental, describes how these techniques to recognize spelling variants, names, acronyms, and abbreviations
- Source
- Proceedings of the 15th National Online Meeting 1994, New York, 10-12 May 1994. Ed. by M.E. Williams
-
Plaunt, C.; Norgard, B.A.: ¬An association-based method for automatic indexing with a controlled vocabulary (1998)
0.05
0.049894616 = product of:
0.079831384 = sum of:
0.020873476 = weight(_text_:retrieval in 1794) [ClassicSimilarity], result of:
0.020873476 = score(doc=1794,freq=2.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.16710453 = fieldWeight in 1794, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0390625 = fieldNorm(doc=1794)
0.021389665 = weight(_text_:use in 1794) [ClassicSimilarity], result of:
0.021389665 = score(doc=1794,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.1691581 = fieldWeight in 1794, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0390625 = fieldNorm(doc=1794)
0.015778005 = weight(_text_:of in 1794) [ClassicSimilarity], result of:
0.015778005 = score(doc=1794,freq=16.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.24433708 = fieldWeight in 1794, product of:
4.0 = tf(freq=16.0), with freq of:
16.0 = termFreq=16.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0390625 = fieldNorm(doc=1794)
0.007803111 = product of:
0.015606222 = sum of:
0.015606222 = weight(_text_:on in 1794) [ClassicSimilarity], result of:
0.015606222 = score(doc=1794,freq=4.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.1718293 = fieldWeight in 1794, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0390625 = fieldNorm(doc=1794)
0.5 = coord(1/2)
0.013987125 = product of:
0.02797425 = sum of:
0.02797425 = weight(_text_:22 in 1794) [ClassicSimilarity], result of:
0.02797425 = score(doc=1794,freq=2.0), product of:
0.1446067 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.041294612 = queryNorm
0.19345059 = fieldWeight in 1794, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0390625 = fieldNorm(doc=1794)
0.5 = coord(1/2)
0.625 = coord(5/8)
- Abstract
- In this article, we describe and test a two-stage algorithm based on a lexical collocation technique which maps from the lexical clues contained in a document representation into a controlled vocabulary list of subject headings. Using a collection of 4.626 INSPEC documents, we create a 'dictionary' of associations between the lexical items contained in the titles, authors, and abstracts, and controlled vocabulary subject headings assigned to those records by human indexers using a likelihood ratio statistic as the measure of association. In the deployment stage, we use the dictiony to predict which of the controlled vocabulary subject headings best describe new documents when they are presented to the system. Our evaluation of this algorithm, in which we compare the automatically assigned subject headings to the subject headings assigned to the test documents by human catalogers, shows that we can obtain results comparable to, and consistent with, human cataloging. In effect we have cast this as a classic partial match information retrieval problem. We consider the problem to be one of 'retrieving' (or assigning) the most probably 'relevant' (or correct) controlled vocabulary subject headings to a document based on the clues contained in that document
- Date
- 11. 9.2000 19:53:22
- Source
- Journal of the American Society for Information Science. 49(1998) no.10, S.888-902
-
Hirawa, M.: Role of keywords in the network searching era (1998)
0.05
0.049155936 = product of:
0.09831187 = sum of:
0.033397563 = weight(_text_:retrieval in 3446) [ClassicSimilarity], result of:
0.033397563 = score(doc=3446,freq=2.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.26736724 = fieldWeight in 3446, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0625 = fieldNorm(doc=3446)
0.03422346 = weight(_text_:use in 3446) [ClassicSimilarity], result of:
0.03422346 = score(doc=3446,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.27065295 = fieldWeight in 3446, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0625 = fieldNorm(doc=3446)
0.021862645 = weight(_text_:of in 3446) [ClassicSimilarity], result of:
0.021862645 = score(doc=3446,freq=12.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.33856338 = fieldWeight in 3446, product of:
3.4641016 = tf(freq=12.0), with freq of:
12.0 = termFreq=12.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0625 = fieldNorm(doc=3446)
0.008828212 = product of:
0.017656423 = sum of:
0.017656423 = weight(_text_:on in 3446) [ClassicSimilarity], result of:
0.017656423 = score(doc=3446,freq=2.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.19440265 = fieldWeight in 3446, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0625 = fieldNorm(doc=3446)
0.5 = coord(1/2)
0.5 = coord(4/8)
- Abstract
- A survey of Japanese OPACs available on the Internet was conducted relating to use of keywords for subject access. The findings suggest that present OPACs are not capable of storing subject-oriented information. Currently available keyword access derives from a merely title-based retrieval system. Contents data should be added to bibliographic records as an efficient way of providing subject access, and costings for this process should be estimated. Word standardisation issues must also be addressed
- Source
- Igaku Toshokan (Journal of the Japan Medical Library Association). 45(1998) no.2, S.222-227
-
Lassalle, E.: Text retrieval : from a monolingual system to a multilingual system (1993)
0.05
0.0490637 = product of:
0.0981274 = sum of:
0.041327372 = weight(_text_:retrieval in 7403) [ClassicSimilarity], result of:
0.041327372 = score(doc=7403,freq=4.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.33085006 = fieldWeight in 7403, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0546875 = fieldNorm(doc=7403)
0.029945528 = weight(_text_:use in 7403) [ClassicSimilarity], result of:
0.029945528 = score(doc=7403,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.23682132 = fieldWeight in 7403, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0546875 = fieldNorm(doc=7403)
0.019129815 = weight(_text_:of in 7403) [ClassicSimilarity], result of:
0.019129815 = score(doc=7403,freq=12.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.29624295 = fieldWeight in 7403, product of:
3.4641016 = tf(freq=12.0), with freq of:
12.0 = termFreq=12.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0546875 = fieldNorm(doc=7403)
0.007724685 = product of:
0.01544937 = sum of:
0.01544937 = weight(_text_:on in 7403) [ClassicSimilarity], result of:
0.01544937 = score(doc=7403,freq=2.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.17010231 = fieldWeight in 7403, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0546875 = fieldNorm(doc=7403)
0.5 = coord(1/2)
0.5 = coord(4/8)
- Abstract
- Describes the TELMI monolingual text retrieval system and its future extension, a multilingual system. TELMI is designed for medium sized databases containing short texts. The characteristics of the system are fine-grained natural language processing (NLP); an open domain and a large scale knowledge base; automated indexing based on conceptual representation of texts and reusability of the NLP tools. Discusses the French MINITEL service, the MGS information service and the TELMI research system covering the full text system; NLP architecture; the lexical level; the syntactic level; the semantic level and an example of the use of a generic system
- Source
- Journal of document and text management. 1(1993) no.1, S.65-74
-
Chevallet, J.-P.; Bruandet, M.F.: Impact de l'utilisation de multi terms sur la qualité des résponses dùn système de recherche d'information a indexation automatique (1999)
0.05
0.048978385 = product of:
0.09795677 = sum of:
0.033397563 = weight(_text_:retrieval in 6253) [ClassicSimilarity], result of:
0.033397563 = score(doc=6253,freq=2.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.26736724 = fieldWeight in 6253, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0625 = fieldNorm(doc=6253)
0.03422346 = weight(_text_:use in 6253) [ClassicSimilarity], result of:
0.03422346 = score(doc=6253,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.27065295 = fieldWeight in 6253, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0625 = fieldNorm(doc=6253)
0.017850775 = weight(_text_:of in 6253) [ClassicSimilarity], result of:
0.017850775 = score(doc=6253,freq=8.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.27643585 = fieldWeight in 6253, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0625 = fieldNorm(doc=6253)
0.012484977 = product of:
0.024969954 = sum of:
0.024969954 = weight(_text_:on in 6253) [ClassicSimilarity], result of:
0.024969954 = score(doc=6253,freq=4.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.27492687 = fieldWeight in 6253, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0625 = fieldNorm(doc=6253)
0.5 = coord(1/2)
0.5 = coord(4/8)
- Footnote
- Übers. d. Titels: Impact of the use of multi-terms on the quality of the answers of an information retrieval system based on automatic indexing
-
Bordoni, L.; Pazienza, M.T.: Documents automatic indexing in an environmental domain (1997)
0.05
0.046961453 = product of:
0.093922906 = sum of:
0.041327372 = weight(_text_:retrieval in 530) [ClassicSimilarity], result of:
0.041327372 = score(doc=530,freq=4.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.33085006 = fieldWeight in 530, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0546875 = fieldNorm(doc=530)
0.022089208 = weight(_text_:of in 530) [ClassicSimilarity], result of:
0.022089208 = score(doc=530,freq=16.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.34207192 = fieldWeight in 530, product of:
4.0 = tf(freq=16.0), with freq of:
16.0 = termFreq=16.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0546875 = fieldNorm(doc=530)
0.010924355 = product of:
0.02184871 = sum of:
0.02184871 = weight(_text_:on in 530) [ClassicSimilarity], result of:
0.02184871 = score(doc=530,freq=4.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.24056101 = fieldWeight in 530, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0546875 = fieldNorm(doc=530)
0.5 = coord(1/2)
0.019581974 = product of:
0.039163947 = sum of:
0.039163947 = weight(_text_:22 in 530) [ClassicSimilarity], result of:
0.039163947 = score(doc=530,freq=2.0), product of:
0.1446067 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.041294612 = queryNorm
0.2708308 = fieldWeight in 530, 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=530)
0.5 = coord(1/2)
0.5 = coord(4/8)
- Abstract
- Describes an application of Natural Language Processing (NLP) techniques, in HIRMA (Hypertextual Information Retrieval Managed by ARIOSTO), to the problem of document indexing by referring to a system which incorporates natural language processing techniques to determine the subject of the text of documents and to associate them with relevant semantic indexes. Describes briefly the overall system, details of its implementation on a corpus of scientific abstracts related to environmental topics and experimental evidence of the system's behaviour. Analyzes in detail an experiment designed to evaluate the system's retrieval ability in terms of recall and precision
- Source
- International forum on information and documentation. 22(1997) no.1, S.17-28
-
SIGIR'92 : Proceedings of the 15th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval (1992)
0.04
0.044256803 = product of:
0.088513605 = sum of:
0.048460644 = weight(_text_:retrieval in 6671) [ClassicSimilarity], result of:
0.048460644 = score(doc=6671,freq=22.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.3879561 = fieldWeight in 6671, product of:
4.690416 = tf(freq=22.0), with freq of:
22.0 = termFreq=22.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.02734375 = fieldNorm(doc=6671)
0.014972764 = weight(_text_:use in 6671) [ClassicSimilarity], result of:
0.014972764 = score(doc=6671,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.11841066 = fieldWeight in 6671, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.02734375 = fieldNorm(doc=6671)
0.015619429 = weight(_text_:of in 6671) [ClassicSimilarity], result of:
0.015619429 = score(doc=6671,freq=32.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.24188137 = fieldWeight in 6671, product of:
5.656854 = tf(freq=32.0), with freq of:
32.0 = termFreq=32.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.02734375 = fieldNorm(doc=6671)
0.009460769 = product of:
0.018921537 = sum of:
0.018921537 = weight(_text_:on in 6671) [ClassicSimilarity], result of:
0.018921537 = score(doc=6671,freq=12.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.20833194 = fieldWeight in 6671, product of:
3.4641016 = tf(freq=12.0), with freq of:
12.0 = termFreq=12.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.02734375 = fieldNorm(doc=6671)
0.5 = coord(1/2)
0.5 = coord(4/8)
- Abstract
- The conference was organized by the Royal School of Librarianship in Copenhagen and was held in cooperation with AICA-GLIR (Italy), BCS-IRSG (UK), DD (Denmark), GI (Germany), INRIA (France). It had support from Apple Computer, Denmark. The volume contains the 32 papers and reports on the two panel sessions, moderated by W.B. Croft, and R. Kovetz, respectively
- Content
- HARMAN, D.: Relevance feedback revisited; AALBERSBERG, I.J.: Incremental relevance feedback; TAGUE-SUTCLIFFE, J.: Measuring the informativeness of a retrieval process; LEWIS, D.D.: An evaluation of phrasal and clustered representations on a text categorization task; BLOSSEVILLE, M.J., G. HÉBRAIL, M.G. MONTEIL u. N. PÉNOT: Automatic document classification: natural language processing, statistical analysis, and expert system techniques used together; MASAND, B., G. LINOFF u. D. WALTZ: Classifying news stories using memory based reasoning; KEEN, E.M.: Term position ranking: some new test results; CROUCH, C.J. u. B. YANG: Experiments in automatic statistical thesaurus construction; GREFENSTETTE, G.: Use of syntactic context to produce term association lists for text retrieval; ANICK, P.G. u. R.A. FLYNN: Versioning of full-text information retrieval system; BURKOWSKI, F.J.: Retrieval activities in a database consisting of heterogeneous collections; DEERWESTER, S.C., K. WACLENA u. M. LaMAR: A textual object management system; NIE, J.-Y.:Towards a probabilistic modal logic for semantic-based information retrieval; WANG, A.W., S.K.M. WONG u. Y.Y. YAO: An analysis of vector space models based on computational geometry; BARTELL, B.T., G.W. COTTRELL u. R.K. BELEW: Latent semantic indexing is an optimal special case of multidimensional scaling; GLAVITSCH, U. u. P. SCHÄUBLE: A system for retrieving speech documents; MARGULIS, E.L.: N-Poisson document modelling; HESS, M.: An incrementally extensible document retrieval system based on linguistics and logical principles; COOPER, W.S., F.C. GEY u. D.P. DABNEY: Probabilistic retrieval based on staged logistic regression; FUHR, N.: Integration of probabilistic fact and text retrieval; CROFT, B., L.A. SMITH u. H. TURTLE: A loosely-coupled integration of a text retrieval system and an object-oriented database system; DUMAIS, S.T. u. J. NIELSEN: Automating the assignement of submitted manuscripts to reviewers; GOST, M.A. u. M. MASOTTI: Design of an OPAC database to permit different subject searching accesses; ROBERTSON, A.M. u. P. WILLETT: Searching for historical word forms in a database of 17th century English text using spelling correction methods; FAX, E.A., Q.F. CHEN u. L.S. HEATH: A faster algorithm for constructing minimal perfect hash functions; MOFFAT, A. u. J. ZOBEL: Parameterised compression for sparse bitmaps; GRANDI, F., P. TIBERIO u. P. Zezula: Frame-sliced patitioned parallel signature files; ALLEN, B.: Cognitive differences in end user searching of a CD-ROM index; SONNENWALD, D.H.: Developing a theory to guide the process of designing information retrieval systems; CUTTING, D.R., J.O. PEDERSEN, D. KARGER, u. J.W. TUKEY: Scatter/ Gather: a cluster-based approach to browsing large document collections; CHALMERS, M. u. P. CHITSON: Bead: Explorations in information visualization; WILLIAMSON, C. u. B. SHNEIDERMAN: The dynamic HomeFinder: evaluating dynamic queries in a real-estate information exploring system
-
Renouf, A.: Sticking to the text : a corpus linguist's view of language (1993)
0.04
0.043777823 = product of:
0.08755565 = sum of:
0.029222867 = weight(_text_:retrieval in 2314) [ClassicSimilarity], result of:
0.029222867 = score(doc=2314,freq=2.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.23394634 = fieldWeight in 2314, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0546875 = fieldNorm(doc=2314)
0.029945528 = weight(_text_:use in 2314) [ClassicSimilarity], result of:
0.029945528 = score(doc=2314,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.23682132 = fieldWeight in 2314, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0546875 = fieldNorm(doc=2314)
0.020662563 = weight(_text_:of in 2314) [ClassicSimilarity], result of:
0.020662563 = score(doc=2314,freq=14.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.31997898 = fieldWeight in 2314, product of:
3.7416575 = tf(freq=14.0), with freq of:
14.0 = termFreq=14.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0546875 = fieldNorm(doc=2314)
0.007724685 = product of:
0.01544937 = sum of:
0.01544937 = weight(_text_:on in 2314) [ClassicSimilarity], result of:
0.01544937 = score(doc=2314,freq=2.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.17010231 = fieldWeight in 2314, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0546875 = fieldNorm(doc=2314)
0.5 = coord(1/2)
0.5 = coord(4/8)
- Abstract
- Corpus linguistics is the study of large, computer held bodies of text. Some corpus linguists are concerned with language descriptions for its own sake. On the corpus-linguistic continuum, the study of raw ASCII text is situated at one end, and the study of heavily pre-coded text at the other. Discusses the use of word frequency to identify changes in the lexicon; word repetition and word positioning in automatic abstracting and word clusters in automatic text retrieval. Compares the machine extract with manual abstracts. Abstractors and indexers may find themselves taking the original wording of the text more into account as the focus moves towards the electronic medium and away from the hard copy
-
Wan, T.-L.; Evens, M.; Wan, Y.-W.; Pao, Y.-Y.: Experiments with automatic indexing and a relational thesaurus in a Chinese information retrieval system (1997)
0.04
0.042907372 = product of:
0.11441966 = sum of:
0.06534432 = weight(_text_:retrieval in 956) [ClassicSimilarity], result of:
0.06534432 = score(doc=956,freq=10.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.5231199 = fieldWeight in 956, product of:
3.1622777 = tf(freq=10.0), with freq of:
10.0 = termFreq=10.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0546875 = fieldNorm(doc=956)
0.029945528 = weight(_text_:use in 956) [ClassicSimilarity], result of:
0.029945528 = score(doc=956,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.23682132 = fieldWeight in 956, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0546875 = fieldNorm(doc=956)
0.019129815 = weight(_text_:of in 956) [ClassicSimilarity], result of:
0.019129815 = score(doc=956,freq=12.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.29624295 = fieldWeight in 956, product of:
3.4641016 = tf(freq=12.0), with freq of:
12.0 = termFreq=12.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0546875 = fieldNorm(doc=956)
0.375 = coord(3/8)
- Abstract
- This article describes a series of experiments with an interactive Chinese information retrieval system named CIRS and an interactive relational thesaurus. 2 important issues have been explored: whether thesauri enhance the retrieval effectiveness of Chinese documents, and whether automatic indexing can complete with manual indexing in a Chinese information retrieval system. Recall and precision are used to measure and evaluate the effectiveness of the system. Statistical analysis of the recall and precision measures suggest that the use of the relational thesaurus does improve the retrieval effectiveness both in the automatic indexing environment and in the manual indexing environment and that automatic indexing is at least as good as manual indexing
- Source
- Journal of the American Society for Information Science. 48(1997) no.12, S.1086-1096
-
Chowdhury, G.G.: Natural language processing and information retrieval : pt.1: basic issues; pt.2: major applications (1991)
0.04
0.04236569 = product of:
0.11297517 = sum of:
0.059039105 = weight(_text_:retrieval in 3313) [ClassicSimilarity], result of:
0.059039105 = score(doc=3313,freq=4.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.47264296 = fieldWeight in 3313, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.078125 = fieldNorm(doc=3313)
0.04277933 = weight(_text_:use in 3313) [ClassicSimilarity], result of:
0.04277933 = score(doc=3313,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.3383162 = fieldWeight in 3313, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.078125 = fieldNorm(doc=3313)
0.011156735 = weight(_text_:of in 3313) [ClassicSimilarity], result of:
0.011156735 = score(doc=3313,freq=2.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.17277241 = fieldWeight in 3313, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.078125 = fieldNorm(doc=3313)
0.375 = coord(3/8)
- Abstract
- Reviews the basic issues and procedures involved in natural language processing of textual material for final use in information retrieval. Covers: natural language processing; natural language understanding; syntactic and semantic analysis; parsing; knowledge bases and knowledge representation
-
Micco, M.; Popp, R.: Improving library subject access (ILSA) : a theory of clustering based in classification (1994)
0.04
0.04217807 = product of:
0.08435614 = sum of:
0.029222867 = weight(_text_:retrieval in 7715) [ClassicSimilarity], result of:
0.029222867 = score(doc=7715,freq=2.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.23394634 = fieldWeight in 7715, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0546875 = fieldNorm(doc=7715)
0.029945528 = weight(_text_:use in 7715) [ClassicSimilarity], result of:
0.029945528 = score(doc=7715,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.23682132 = fieldWeight in 7715, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0546875 = fieldNorm(doc=7715)
0.017463053 = weight(_text_:of in 7715) [ClassicSimilarity], result of:
0.017463053 = score(doc=7715,freq=10.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.2704316 = fieldWeight in 7715, product of:
3.1622777 = tf(freq=10.0), with freq of:
10.0 = termFreq=10.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0546875 = fieldNorm(doc=7715)
0.007724685 = product of:
0.01544937 = sum of:
0.01544937 = weight(_text_:on in 7715) [ClassicSimilarity], result of:
0.01544937 = score(doc=7715,freq=2.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.17010231 = fieldWeight in 7715, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0546875 = fieldNorm(doc=7715)
0.5 = coord(1/2)
0.5 = coord(4/8)
- Abstract
- The ILSA prototype was developed using an object-oriented multimedia user interfcae on six NeXT workstations with two databases: the first with 100.000 MARC records and the second with 20.000 additional records enhanced with table of contents data. The items are grouped into subject clusters consisting of the classification number and the first subject heading assigned. Every other distinct keyword in the MARC record is linked to the subject cluster in an automated natural language mapping scheme, which leads the user from the term entered to the controlled vocabulary of the subject clusters in which the term appeared. The use of a hierarchical classification number (Dewey) makes it possible to broaden or narrow a search at will
- Theme
- Klassifikationssysteme im Online-Retrieval
-
Harman, D.: Automatic indexing (1994)
0.04
0.04055009 = product of:
0.10813357 = sum of:
0.033397563 = weight(_text_:retrieval in 7729) [ClassicSimilarity], result of:
0.033397563 = score(doc=7729,freq=2.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.26736724 = fieldWeight in 7729, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0625 = fieldNorm(doc=7729)
0.05927678 = weight(_text_:use in 7729) [ClassicSimilarity], result of:
0.05927678 = score(doc=7729,freq=6.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.4687847 = fieldWeight in 7729, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0625 = fieldNorm(doc=7729)
0.0154592255 = weight(_text_:of in 7729) [ClassicSimilarity], result of:
0.0154592255 = score(doc=7729,freq=6.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.23940048 = fieldWeight in 7729, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0625 = fieldNorm(doc=7729)
0.375 = coord(3/8)
- Content
- Enthält die Abschnitte: What constitutes a record; What constitutes a word and what 'words' to index; Use of stop lists; Use of suffixing or stemming; Advanced automatic indexing techniques (term weighting, query expansion, the use of multiple-word phrases for indexing)
- Theme
- Semantisches Umfeld in Indexierung u. Retrieval
-
Leyva, I.G.; Munoz, J.V.R.: Tendencias en los sistemas de indizacion automatica : estudio evolutivo (1996)
0.04
0.04020617 = product of:
0.16082469 = sum of:
0.0154592255 = weight(_text_:of in 1462) [ClassicSimilarity], result of:
0.0154592255 = score(doc=1462,freq=6.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.23940048 = fieldWeight in 1462, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0625 = fieldNorm(doc=1462)
0.14536546 = sum of:
0.030581824 = weight(_text_:on in 1462) [ClassicSimilarity], result of:
0.030581824 = score(doc=1462,freq=6.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.33671528 = fieldWeight in 1462, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0625 = fieldNorm(doc=1462)
0.11478364 = weight(_text_:line in 1462) [ClassicSimilarity], result of:
0.11478364 = score(doc=1462,freq=2.0), product of:
0.23157367 = queryWeight, product of:
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.041294612 = queryNorm
0.4956679 = fieldWeight in 1462, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.0625 = fieldNorm(doc=1462)
0.25 = coord(2/8)
- Abstract
- Early research at the end of the 1950s on computerized indexing used statistical methods based on e.g. frequency, probability, clustering, and relevance. In the 1960s interest began to focus on linguistic analysis and natural language processing e.g. morphological, morphosyntactical, syntactical and semantic analysis. Since the 1980s computerized indexing research has widened to include images, graphics and sound. Examples are given of notable systems developed within each line of approach
-
Buckley, C.; Allan, J.; Salton, G.: Automatic routing and retrieval using Smart : TREC-2 (1995)
0.04
0.03634963 = product of:
0.09693235 = sum of:
0.050096344 = weight(_text_:retrieval in 5699) [ClassicSimilarity], result of:
0.050096344 = score(doc=5699,freq=8.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.40105087 = fieldWeight in 5699, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.046875 = fieldNorm(doc=5699)
0.025667597 = weight(_text_:use in 5699) [ClassicSimilarity], result of:
0.025667597 = score(doc=5699,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.20298971 = fieldWeight in 5699, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.046875 = fieldNorm(doc=5699)
0.021168415 = weight(_text_:of in 5699) [ClassicSimilarity], result of:
0.021168415 = score(doc=5699,freq=20.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.32781258 = fieldWeight in 5699, product of:
4.472136 = tf(freq=20.0), with freq of:
20.0 = termFreq=20.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.046875 = fieldNorm(doc=5699)
0.375 = coord(3/8)
- Abstract
- The Smart information retrieval project emphazises completely automatic approaches to the understanding and retrieval of large quantities of text. The work in the TREC-2 environment continues, performing both routing and ad hoc experiments. The ad hoc work extends investigations into combining global similarities, giving an overall indication of how a document matches a query, with local similarities identifying a smaller part of the document that matches the query. The performance of ad hoc runs is good, but it is clear that full advantage of the available local information is not been taken advantage of. The routing experiments use conventional relevance feedback approaches to routing, but with a much greater degree of query expansion than was previously done. The length of a query vector is increased by a factor of 5 to 10 by adding terms found in previously seen relevant documents. This approach improves effectiveness by 30-40% over the original query
- Theme
- Semantisches Umfeld in Indexierung u. Retrieval
-
Ferber, R.: Automated indexing with thesaurus descriptors : a co-occurence based approach to multilingual retrieval (1997)
0.04
0.03610243 = product of:
0.07220486 = sum of:
0.029519552 = weight(_text_:retrieval in 4144) [ClassicSimilarity], result of:
0.029519552 = score(doc=4144,freq=4.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.23632148 = fieldWeight in 4144, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0390625 = fieldNorm(doc=4144)
0.021389665 = weight(_text_:use in 4144) [ClassicSimilarity], result of:
0.021389665 = score(doc=4144,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.1691581 = fieldWeight in 4144, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0390625 = fieldNorm(doc=4144)
0.015778005 = weight(_text_:of in 4144) [ClassicSimilarity], result of:
0.015778005 = score(doc=4144,freq=16.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.24433708 = fieldWeight in 4144, product of:
4.0 = tf(freq=16.0), with freq of:
16.0 = termFreq=16.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0390625 = fieldNorm(doc=4144)
0.0055176322 = product of:
0.0110352645 = sum of:
0.0110352645 = weight(_text_:on in 4144) [ClassicSimilarity], result of:
0.0110352645 = score(doc=4144,freq=2.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.121501654 = fieldWeight in 4144, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0390625 = fieldNorm(doc=4144)
0.5 = coord(1/2)
0.5 = coord(4/8)
- Abstract
- Indexing documents with descriptors from a multilingual thesaurus is an approach to multilingual information retrieval. However, manual indexing is expensive. Automazed indexing methods in general use terms found in the document. Thesaurus descriptors are complex terms that are often not used in documents or have specific meanings within the thesaurus; therefore most weighting schemes of automated indexing methods are not suited to select thesaurus descriptors. In this paper a linear associative system is described that uses similarity values extracted from a large corpus of manually indexed documents to construct a rank ordering of the descriptors for a given document title. The system is adaptive and has to be tuned with a training sample of records for the specific task. The system was tested on a corpus of some 80.000 bibliographic records. The results show a high variability with changing parameter values. This indicated that it is very important to empirically adapt the model to the specific situation it is used in. The overall median of the manually assigned descriptors in the automatically generated ranked list of all 3.631 descriptors is 14 for the set used to adapt the system and 11 for a test set not used in the optimization process. This result shows that the optimization is not a fitting to a specific training set but a real adaptation of the model to the setting
-
Alexander, M.: Retrieving digital data with fuzzy matching (1996)
0.03
0.032842048 = product of:
0.087578796 = sum of:
0.033397563 = weight(_text_:retrieval in 6961) [ClassicSimilarity], result of:
0.033397563 = score(doc=6961,freq=2.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.26736724 = fieldWeight in 6961, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0625 = fieldNorm(doc=6961)
0.03422346 = weight(_text_:use in 6961) [ClassicSimilarity], result of:
0.03422346 = score(doc=6961,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.27065295 = fieldWeight in 6961, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0625 = fieldNorm(doc=6961)
0.019957775 = weight(_text_:of in 6961) [ClassicSimilarity], result of:
0.019957775 = score(doc=6961,freq=10.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.3090647 = fieldWeight in 6961, product of:
3.1622777 = tf(freq=10.0), with freq of:
10.0 = termFreq=10.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0625 = fieldNorm(doc=6961)
0.375 = coord(3/8)
- Abstract
- Briefly describes the Excalibur EFS system which makes use of adaptive pattern recognition technology as an aid to automatic indexing and how it is being tested at the British Library for the indexing and retrieval of scanned images from the library's holdings. Notes how Excalibur EFS can support a wide degree of fuzzy searching, compensate for the errors produced by OCR conversion of scanned images, reduce the costs of indexing, and require far less storage space than more traditional indexes
-
Salton, G.; Buckley, C.; Allan, J.: Automatic structuring of text files (1992)
0.03
0.031155093 = product of:
0.08308025 = sum of:
0.033397563 = weight(_text_:retrieval in 6507) [ClassicSimilarity], result of:
0.033397563 = score(doc=6507,freq=2.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.26736724 = fieldWeight in 6507, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0625 = fieldNorm(doc=6507)
0.03422346 = weight(_text_:use in 6507) [ClassicSimilarity], result of:
0.03422346 = score(doc=6507,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.27065295 = fieldWeight in 6507, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0625 = fieldNorm(doc=6507)
0.0154592255 = weight(_text_:of in 6507) [ClassicSimilarity], result of:
0.0154592255 = score(doc=6507,freq=6.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.23940048 = fieldWeight in 6507, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0625 = fieldNorm(doc=6507)
0.375 = coord(3/8)
- Abstract
- In many practical information retrieval situations, it is necessary to process heterogeneous text databases that vary greatly in scope and coverage and deal with many different subjects. In such an environment it is important to provide flexible access to individual text pieces and to structure the collection so that related text elements are identified and properly linked. Describes methods for the automatic structuring of heterogeneous text collections and the construction of browsing tools and access procedures that facilitate collection use. Illustrates these emthods with searches using a large automated encyclopedia
