-
Fuhr, N.: Konzepte zur Gestaltung zukünftiger Information-Retrieval-Systeme (1992)
0.01
0.0113271745 = product of:
0.07929022 = sum of:
0.019976506 = weight(_text_:information in 7857) [ClassicSimilarity], result of:
0.019976506 = score(doc=7857,freq=4.0), product of:
0.052020688 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.029633347 = queryNorm
0.3840108 = fieldWeight in 7857, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.109375 = fieldNorm(doc=7857)
0.05931371 = weight(_text_:retrieval in 7857) [ClassicSimilarity], result of:
0.05931371 = score(doc=7857,freq=4.0), product of:
0.08963835 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.029633347 = queryNorm
0.6617001 = fieldWeight in 7857, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.109375 = fieldNorm(doc=7857)
0.14285715 = coord(2/14)
- Source
- Experimentelles und praktisches Information Retrieval: Festschrift für Gerhard Lustig. Hrsg. R. Kuhlen
-
Fuhr, N.: Hypertext und Information-Retrieval (1990)
0.01
0.009153739 = product of:
0.06407617 = sum of:
0.016143454 = weight(_text_:information in 4473) [ClassicSimilarity], result of:
0.016143454 = score(doc=4473,freq=2.0), product of:
0.052020688 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.029633347 = queryNorm
0.3103276 = fieldWeight in 4473, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.125 = fieldNorm(doc=4473)
0.047932718 = weight(_text_:retrieval in 4473) [ClassicSimilarity], result of:
0.047932718 = score(doc=4473,freq=2.0), product of:
0.08963835 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.029633347 = queryNorm
0.5347345 = fieldWeight in 4473, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.125 = fieldNorm(doc=4473)
0.14285715 = coord(2/14)
-
Fuhr, N.: Towards data abstraction in networked information retrieval systems (1999)
0.01
0.008845377 = product of:
0.061917633 = sum of:
0.019976506 = weight(_text_:information in 4517) [ClassicSimilarity], result of:
0.019976506 = score(doc=4517,freq=4.0), product of:
0.052020688 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.029633347 = queryNorm
0.3840108 = fieldWeight in 4517, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.109375 = fieldNorm(doc=4517)
0.04194113 = weight(_text_:retrieval in 4517) [ClassicSimilarity], result of:
0.04194113 = score(doc=4517,freq=2.0), product of:
0.08963835 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.029633347 = queryNorm
0.46789268 = fieldWeight in 4517, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.109375 = fieldNorm(doc=4517)
0.14285715 = coord(2/14)
- Source
- Information processing and management. 35(1999) no.2, S.101-119
-
Fuhr, N.: von theoretischen Konzepten zur praktischen Anwendung : Hypertext und Information Retrieval (1990)
0.01
0.008009522 = product of:
0.05606665 = sum of:
0.014125523 = weight(_text_:information in 104) [ClassicSimilarity], result of:
0.014125523 = score(doc=104,freq=2.0), product of:
0.052020688 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.029633347 = queryNorm
0.27153665 = fieldWeight in 104, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.109375 = fieldNorm(doc=104)
0.04194113 = weight(_text_:retrieval in 104) [ClassicSimilarity], result of:
0.04194113 = score(doc=104,freq=2.0), product of:
0.08963835 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.029633347 = queryNorm
0.46789268 = fieldWeight in 104, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.109375 = fieldNorm(doc=104)
0.14285715 = coord(2/14)
-
Fuhr, N.: Zur Überwindung der Diskrepanz zwischen Retrievalforschung und -praxis (1990)
0.01
0.00599504 = product of:
0.041965276 = sum of:
0.008071727 = weight(_text_:information in 6625) [ClassicSimilarity], result of:
0.008071727 = score(doc=6625,freq=2.0), product of:
0.052020688 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.029633347 = queryNorm
0.1551638 = fieldWeight in 6625, 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=6625)
0.033893548 = weight(_text_:retrieval in 6625) [ClassicSimilarity], result of:
0.033893548 = score(doc=6625,freq=4.0), product of:
0.08963835 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.029633347 = queryNorm
0.37811437 = fieldWeight in 6625, 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=6625)
0.14285715 = coord(2/14)
- Abstract
- In diesem Beitrag werden einige Forschungsergebnisse des Information Retrieval vorgestellt, die unmittelbar zur Verbesserung der Retrievalqualität für bereits existierende Datenbanken eingesetzt werden können: Linguistische Algorithmen zur Grund- und Stammformreduktion unterstützen die Suche nach Flexions- und Derivationsformen von Suchtermen. Rankingalgorithmen, die Frage- und Dokumentterme gewichten, führen zu signifikant besseren Retrievalergebnissen als beim Booleschen Retrieval. Durch Relevance Feedback können die Retrievalqualität weiter gesteigert und außerdem der Benutzer bei der sukzessiven Modifikation seiner Frageformulierung unterstützt werden. Es wird eine benutzerfreundliche Bedienungsoberfläche für ein System vorgestellt, das auf diesen Konzepten basiert.
-
Pfeifer, U.; Poersch, T.; Fuhr, N.: Retrieval effectiveness of proper name search methods (1996)
0.01
0.00599504 = product of:
0.041965276 = sum of:
0.008071727 = weight(_text_:information in 6982) [ClassicSimilarity], result of:
0.008071727 = score(doc=6982,freq=2.0), product of:
0.052020688 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.029633347 = queryNorm
0.1551638 = fieldWeight in 6982, 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=6982)
0.033893548 = weight(_text_:retrieval in 6982) [ClassicSimilarity], result of:
0.033893548 = score(doc=6982,freq=4.0), product of:
0.08963835 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.029633347 = queryNorm
0.37811437 = fieldWeight in 6982, 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=6982)
0.14285715 = coord(2/14)
- Abstract
- Reviews similarity measures for searching names. These measures deal with phonetic similarity, typing errors, and plain string similarity. Shows experimentally that all 3 approaches lead to significantly higher retrieval quality than plain identity. Further improvements are possible by combining different methods. Develops a probabilistic interpretation of string similarity that leads to better results than an ad-hoc approach
- Source
- Information processing and management. 32(1996) no.6, S.667-679
-
Pfeifer, U.; Fuhr, N.; Huynh, T.: Searching structured documents with the enhanced retrieval functionality of freeWAIS-sf and SFgate (1995)
0.00
0.002118347 = product of:
0.029656855 = sum of:
0.029656855 = weight(_text_:retrieval in 2214) [ClassicSimilarity], result of:
0.029656855 = score(doc=2214,freq=4.0), product of:
0.08963835 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.029633347 = queryNorm
0.33085006 = fieldWeight in 2214, 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=2214)
0.071428575 = coord(1/14)
- Abstract
- The original WAIS implementation by Thinking Machines and others treats documents as uniform bags of terms. Since most documents exhibit some internal structure, it is desirable to provide the user means to exploit this structure in his queries. Presents extensions to the freeWAIS indexer and server, which allows access to document structures using the original WAIS protocol. Major extensions include: arbitrary document formats, search in individual structure elements, stemming and phonetic search, support of 8-bit character sets, numeric concepts and operators. combination of Boolean and linear retrieval. Presents a WWW-WAIS gateway specially tailored for usage with freeWAIS-sf which transforms filled out HTML forms to the new query syntax
-
Fuhr, N.: Tendenzen der Informationssysteme (1990)
0.00
0.001008966 = product of:
0.014125523 = sum of:
0.014125523 = weight(_text_:information in 4333) [ClassicSimilarity], result of:
0.014125523 = score(doc=4333,freq=2.0), product of:
0.052020688 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.029633347 = queryNorm
0.27153665 = fieldWeight in 4333, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.109375 = fieldNorm(doc=4333)
0.071428575 = coord(1/14)
- Source
- Grundlagen der praktischen Information und Dokumentation: ein Handbuch zur Einführung in die fachliche Informationsarbeit. 3. Aufl. Hrsg.: M. Buder u.a. Bd.2
