-
Maylein, L.; Langenstein, A.: Neues vom Relevanz-Ranking im HEIDI-Katalog der Universitätsbibliothek Heidelberg : Perspektiven für bibliothekarische Dienstleistungen (2013)
0.05
0.054604392 = product of:
0.15601255 = sum of:
0.022864813 = weight(_text_:23 in 775) [ClassicSimilarity], result of:
0.022864813 = score(doc=775,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.31678912 = fieldWeight in 775, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.0625 = fieldNorm(doc=775)
0.022864813 = weight(_text_:23 in 775) [ClassicSimilarity], result of:
0.022864813 = score(doc=775,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.31678912 = fieldWeight in 775, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.0625 = fieldNorm(doc=775)
0.008743806 = weight(_text_:und in 775) [ClassicSimilarity], result of:
0.008743806 = score(doc=775,freq=2.0), product of:
0.044633795 = queryWeight, product of:
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.02013827 = queryNorm
0.19590102 = fieldWeight in 775, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.0625 = fieldNorm(doc=775)
0.022864813 = weight(_text_:23 in 775) [ClassicSimilarity], result of:
0.022864813 = score(doc=775,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.31678912 = fieldWeight in 775, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.0625 = fieldNorm(doc=775)
0.04780147 = weight(_text_:methoden in 775) [ClassicSimilarity], result of:
0.04780147 = score(doc=775,freq=2.0), product of:
0.10436003 = queryWeight, product of:
5.1821747 = idf(docFreq=674, maxDocs=44218)
0.02013827 = queryNorm
0.45804384 = fieldWeight in 775, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.1821747 = idf(docFreq=674, maxDocs=44218)
0.0625 = fieldNorm(doc=775)
0.019859934 = weight(_text_:der in 775) [ClassicSimilarity], result of:
0.019859934 = score(doc=775,freq=10.0), product of:
0.044984195 = queryWeight, product of:
2.2337668 = idf(docFreq=12875, maxDocs=44218)
0.02013827 = queryNorm
0.44148692 = fieldWeight in 775, product of:
3.1622777 = tf(freq=10.0), with freq of:
10.0 = termFreq=10.0
2.2337668 = idf(docFreq=12875, maxDocs=44218)
0.0625 = fieldNorm(doc=775)
0.011012898 = product of:
0.022025796 = sum of:
0.022025796 = weight(_text_:29 in 775) [ClassicSimilarity], result of:
0.022025796 = score(doc=775,freq=2.0), product of:
0.070840135 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.02013827 = queryNorm
0.31092256 = fieldWeight in 775, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.0625 = fieldNorm(doc=775)
0.5 = coord(1/2)
0.35 = coord(7/20)
- Abstract
- Das Relevanz-Ranking im Katalog der Universitätsbibliothek Heidelberg HEIDI, bereits 2009 in einem Beitrag in dieser Zeitschrift beschrieben, wurde in den letzten Jahren durch neue Entwicklungen und Methoden stark verbessert. Der Aufsatz beschreibt die Realisierung der bisherigen Rankingmaßnahmen unter der neu eingesetzten Suchmaschinenplattform SOLR. Weiter werden verschiedene neue Möglichkeiten für Rankinganpassungen unter SOLR sowie deren Einsatz im HEIDI-Katalog dargestellt.
- Date
- 29. 6.2013 18:06:23
-
Hora, M.: Methoden für das Ranking in Discovery-Systemen (2018)
0.04
0.037475854 = product of:
0.124919504 = sum of:
0.02000671 = weight(_text_:23 in 4968) [ClassicSimilarity], result of:
0.02000671 = score(doc=4968,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.27719048 = fieldWeight in 4968, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.0546875 = fieldNorm(doc=4968)
0.02000671 = weight(_text_:23 in 4968) [ClassicSimilarity], result of:
0.02000671 = score(doc=4968,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.27719048 = fieldWeight in 4968, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.0546875 = fieldNorm(doc=4968)
0.015301661 = weight(_text_:und in 4968) [ClassicSimilarity], result of:
0.015301661 = score(doc=4968,freq=8.0), product of:
0.044633795 = queryWeight, product of:
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.02013827 = queryNorm
0.34282678 = fieldWeight in 4968, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.0546875 = fieldNorm(doc=4968)
0.02000671 = weight(_text_:23 in 4968) [ClassicSimilarity], result of:
0.02000671 = score(doc=4968,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.27719048 = fieldWeight in 4968, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.0546875 = fieldNorm(doc=4968)
0.041826285 = weight(_text_:methoden in 4968) [ClassicSimilarity], result of:
0.041826285 = score(doc=4968,freq=2.0), product of:
0.10436003 = queryWeight, product of:
5.1821747 = idf(docFreq=674, maxDocs=44218)
0.02013827 = queryNorm
0.40078837 = fieldWeight in 4968, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.1821747 = idf(docFreq=674, maxDocs=44218)
0.0546875 = fieldNorm(doc=4968)
0.0077714287 = weight(_text_:der in 4968) [ClassicSimilarity], result of:
0.0077714287 = score(doc=4968,freq=2.0), product of:
0.044984195 = queryWeight, product of:
2.2337668 = idf(docFreq=12875, maxDocs=44218)
0.02013827 = queryNorm
0.17275909 = fieldWeight in 4968, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.2337668 = idf(docFreq=12875, maxDocs=44218)
0.0546875 = fieldNorm(doc=4968)
0.3 = coord(6/20)
- Abstract
- Discovery-Systeme bieten meist als Standardeinstellung eine Sortierung nach Relevanz an. Wie die Relevanz ermittelt wird, ist häufig intransparent. Dabei wären Kenntnisse darüber aus Nutzersicht ein wichtiger Faktor in der Informationskompetenz, während Bibliotheken sicherstellen sollten, dass das Ranking zum eigenen Bestand und Publikum passt. In diesem Aufsatz wird dargestellt, wie Discovery-Systeme Treffer auswählen und bewerten. Dazu gehören Indexierung, Prozessierung, Text-Matching und weitere Relevanzkriterien, z. B. Popularität oder Verfügbarkeit. Schließlich müssen alle betrachteten Kriterien zu einem zentralen Score zusammengefasst werden. Ein besonderer Fokus wird auf das Ranking von EBSCO Discovery Service, Primo und Summon gelegt.
- Source
- Perspektive Bibliothek. 7(2018) H.2, S.2-23
-
Mandl, T.: Web- und Multimedia-Dokumente : Neuere Entwicklungen bei der Evaluierung von Information Retrieval Systemen (2003)
0.03
0.030210808 = product of:
0.12084323 = sum of:
0.028013978 = weight(_text_:software in 1734) [ClassicSimilarity], result of:
0.028013978 = score(doc=1734,freq=2.0), product of:
0.07989157 = queryWeight, product of:
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.02013827 = queryNorm
0.35064998 = fieldWeight in 1734, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.0625 = fieldNorm(doc=1734)
0.021417862 = weight(_text_:und in 1734) [ClassicSimilarity], result of:
0.021417862 = score(doc=1734,freq=12.0), product of:
0.044633795 = queryWeight, product of:
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.02013827 = queryNorm
0.47985753 = fieldWeight in 1734, product of:
3.4641016 = tf(freq=12.0), with freq of:
12.0 = termFreq=12.0
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.0625 = fieldNorm(doc=1734)
0.028013978 = weight(_text_:software in 1734) [ClassicSimilarity], result of:
0.028013978 = score(doc=1734,freq=2.0), product of:
0.07989157 = queryWeight, product of:
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.02013827 = queryNorm
0.35064998 = fieldWeight in 1734, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.0625 = fieldNorm(doc=1734)
0.015383439 = weight(_text_:der in 1734) [ClassicSimilarity], result of:
0.015383439 = score(doc=1734,freq=6.0), product of:
0.044984195 = queryWeight, product of:
2.2337668 = idf(docFreq=12875, maxDocs=44218)
0.02013827 = queryNorm
0.34197432 = fieldWeight in 1734, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
2.2337668 = idf(docFreq=12875, maxDocs=44218)
0.0625 = fieldNorm(doc=1734)
0.028013978 = weight(_text_:software in 1734) [ClassicSimilarity], result of:
0.028013978 = score(doc=1734,freq=2.0), product of:
0.07989157 = queryWeight, product of:
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.02013827 = queryNorm
0.35064998 = fieldWeight in 1734, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.0625 = fieldNorm(doc=1734)
0.25 = coord(5/20)
- Abstract
- Die Menge an Daten im Internet steigt weiter rapide an. Damit wächst auch der Bedarf an qualitativ hochwertigen Information Retrieval Diensten zur Orientierung und problemorientierten Suche. Die Entscheidung für die Benutzung oder Beschaffung von Information Retrieval Software erfordert aussagekräftige Evaluierungsergebnisse. Dieser Beitrag stellt neuere Entwicklungen bei der Evaluierung von Information Retrieval Systemen vor und zeigt den Trend zu Spezialisierung und Diversifizierung von Evaluierungsstudien, die den Realitätsgrad derErgebnisse erhöhen. DerSchwerpunkt liegt auf dem Retrieval von Fachtexten, Internet-Seiten und Multimedia-Objekten.
- Source
- Information - Wissenschaft und Praxis. 54(2003) H.4, S.203-210
-
Kanaeva, Z.: Ranking: Google und CiteSeer (2005)
0.03
0.027929602 = product of:
0.09309867 = sum of:
0.02000671 = weight(_text_:23 in 3276) [ClassicSimilarity], result of:
0.02000671 = score(doc=3276,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.27719048 = fieldWeight in 3276, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.0546875 = fieldNorm(doc=3276)
0.02000671 = weight(_text_:23 in 3276) [ClassicSimilarity], result of:
0.02000671 = score(doc=3276,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.27719048 = fieldWeight in 3276, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.0546875 = fieldNorm(doc=3276)
0.013251626 = weight(_text_:und in 3276) [ClassicSimilarity], result of:
0.013251626 = score(doc=3276,freq=6.0), product of:
0.044633795 = queryWeight, product of:
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.02013827 = queryNorm
0.2968967 = fieldWeight in 3276, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.0546875 = fieldNorm(doc=3276)
0.02000671 = weight(_text_:23 in 3276) [ClassicSimilarity], result of:
0.02000671 = score(doc=3276,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.27719048 = fieldWeight in 3276, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.0546875 = fieldNorm(doc=3276)
0.0134605095 = weight(_text_:der in 3276) [ClassicSimilarity], result of:
0.0134605095 = score(doc=3276,freq=6.0), product of:
0.044984195 = queryWeight, product of:
2.2337668 = idf(docFreq=12875, maxDocs=44218)
0.02013827 = queryNorm
0.29922754 = fieldWeight in 3276, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
2.2337668 = idf(docFreq=12875, maxDocs=44218)
0.0546875 = fieldNorm(doc=3276)
0.006366401 = product of:
0.019099202 = sum of:
0.019099202 = weight(_text_:22 in 3276) [ClassicSimilarity], result of:
0.019099202 = score(doc=3276,freq=2.0), product of:
0.07052079 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.02013827 = queryNorm
0.2708308 = fieldWeight in 3276, 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=3276)
0.33333334 = coord(1/3)
0.3 = coord(6/20)
- Abstract
- Im Rahmen des klassischen Information Retrieval wurden verschiedene Verfahren für das Ranking sowie die Suche in einer homogenen strukturlosen Dokumentenmenge entwickelt. Die Erfolge der Suchmaschine Google haben gezeigt dass die Suche in einer zwar inhomogenen aber zusammenhängenden Dokumentenmenge wie dem Internet unter Berücksichtigung der Dokumentenverbindungen (Links) sehr effektiv sein kann. Unter den von der Suchmaschine Google realisierten Konzepten ist ein Verfahren zum Ranking von Suchergebnissen (PageRank), das in diesem Artikel kurz erklärt wird. Darüber hinaus wird auf die Konzepte eines Systems namens CiteSeer eingegangen, welches automatisch bibliographische Angaben indexiert (engl. Autonomous Citation Indexing, ACI). Letzteres erzeugt aus einer Menge von nicht vernetzten wissenschaftlichen Dokumenten eine zusammenhängende Dokumentenmenge und ermöglicht den Einsatz von Banking-Verfahren, die auf den von Google genutzten Verfahren basieren.
- Date
- 20. 3.2005 16:23:22
- Source
- Information - Wissenschaft und Praxis. 56(2005) H.2, S.87-92
-
Joss, M.W.; Wszola, S.: ¬The engines that can : text search and retrieval software, their strategies, and vendors (1996)
0.03
0.026303962 = product of:
0.13151981 = sum of:
0.04202097 = weight(_text_:software in 5123) [ClassicSimilarity], result of:
0.04202097 = score(doc=5123,freq=8.0), product of:
0.07989157 = queryWeight, product of:
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.02013827 = queryNorm
0.525975 = fieldWeight in 5123, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.046875 = fieldNorm(doc=5123)
0.04202097 = weight(_text_:software in 5123) [ClassicSimilarity], result of:
0.04202097 = score(doc=5123,freq=8.0), product of:
0.07989157 = queryWeight, product of:
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.02013827 = queryNorm
0.525975 = fieldWeight in 5123, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.046875 = fieldNorm(doc=5123)
0.04202097 = weight(_text_:software in 5123) [ClassicSimilarity], result of:
0.04202097 = score(doc=5123,freq=8.0), product of:
0.07989157 = queryWeight, product of:
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.02013827 = queryNorm
0.525975 = fieldWeight in 5123, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.046875 = fieldNorm(doc=5123)
0.005456915 = product of:
0.016370745 = sum of:
0.016370745 = weight(_text_:22 in 5123) [ClassicSimilarity], result of:
0.016370745 = score(doc=5123,freq=2.0), product of:
0.07052079 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.02013827 = queryNorm
0.23214069 = fieldWeight in 5123, 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=5123)
0.33333334 = coord(1/3)
0.2 = coord(4/20)
- Abstract
- Traces the development of text searching and retrieval software designed to cope with the increasing demands made by the storage and handling of large amounts of data, recorded on high data storage media, from CD-ROM to multi gigabyte storage media and online information services, with particular reference to the need to cope with graphics as well as conventional ASCII text. Includes details of: Boolean searching, fuzzy searching and matching; relevance ranking; proximity searching and improved strategies for dealing with text searching in very large databases. Concludes that the best searching tools for CD-ROM publishers are those optimized for searching and retrieval on CD-ROM. CD-ROM drives have relatively lower random seek times than hard discs and so the software most appropriate to the medium is that which can effectively arrange the indexes and text on the CD-ROM to avoid continuous random access searching. Lists and reviews a selection of software packages designed to achieve the sort of results required for rapid CD-ROM searching
- Date
- 12. 9.1996 13:56:22
-
Archuby, C.G.: Interfaces se recuperacion para catalogos en linea con salidas ordenadas por probable relevancia (2000)
0.02
0.021042258 = product of:
0.10521129 = sum of:
0.028581016 = weight(_text_:23 in 5727) [ClassicSimilarity], result of:
0.028581016 = score(doc=5727,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.3959864 = fieldWeight in 5727, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.078125 = fieldNorm(doc=5727)
0.028581016 = weight(_text_:23 in 5727) [ClassicSimilarity], result of:
0.028581016 = score(doc=5727,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.3959864 = fieldWeight in 5727, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.078125 = fieldNorm(doc=5727)
0.028581016 = weight(_text_:23 in 5727) [ClassicSimilarity], result of:
0.028581016 = score(doc=5727,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.3959864 = fieldWeight in 5727, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.078125 = fieldNorm(doc=5727)
0.019468237 = product of:
0.038936473 = sum of:
0.038936473 = weight(_text_:29 in 5727) [ClassicSimilarity], result of:
0.038936473 = score(doc=5727,freq=4.0), product of:
0.070840135 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.02013827 = queryNorm
0.5496386 = fieldWeight in 5727, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.078125 = fieldNorm(doc=5727)
0.5 = coord(1/2)
0.2 = coord(4/20)
- Date
- 29. 1.1996 18:23:13
- Source
- Ciencia da informacao. 29(2000) no.3, S.5-13
-
Wu, H.; Salton, G.: ¬The estimation of term relevance weights using relevance feedback (1981)
0.02
0.020578332 = product of:
0.13718888 = sum of:
0.045729626 = weight(_text_:23 in 4728) [ClassicSimilarity], result of:
0.045729626 = score(doc=4728,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.63357824 = fieldWeight in 4728, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.125 = fieldNorm(doc=4728)
0.045729626 = weight(_text_:23 in 4728) [ClassicSimilarity], result of:
0.045729626 = score(doc=4728,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.63357824 = fieldWeight in 4728, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.125 = fieldNorm(doc=4728)
0.045729626 = weight(_text_:23 in 4728) [ClassicSimilarity], result of:
0.045729626 = score(doc=4728,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.63357824 = fieldWeight in 4728, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.125 = fieldNorm(doc=4728)
0.15 = coord(3/20)
- Date
- 8.10.2000 14:23:35
-
Jones, K.: Linguistic searching versus relevance ranking : DR-LINK and TARGET (1999)
0.02
0.018006042 = product of:
0.12004027 = sum of:
0.04001342 = weight(_text_:23 in 6423) [ClassicSimilarity], result of:
0.04001342 = score(doc=6423,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.55438095 = fieldWeight in 6423, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.109375 = fieldNorm(doc=6423)
0.04001342 = weight(_text_:23 in 6423) [ClassicSimilarity], result of:
0.04001342 = score(doc=6423,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.55438095 = fieldWeight in 6423, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.109375 = fieldNorm(doc=6423)
0.04001342 = weight(_text_:23 in 6423) [ClassicSimilarity], result of:
0.04001342 = score(doc=6423,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.55438095 = fieldWeight in 6423, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.109375 = fieldNorm(doc=6423)
0.15 = coord(3/20)
- Source
- Online and CD-ROM review. 23(1999) no.2, S.67-80
-
Tseng, Y.H.; Lin, Y.I.: Evaluation of fuzzy search, term suggestion, and term relevance feedback in an OPAC system (1998)
0.02
0.015433748 = product of:
0.102891654 = sum of:
0.034297217 = weight(_text_:23 in 6430) [ClassicSimilarity], result of:
0.034297217 = score(doc=6430,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.47518367 = fieldWeight in 6430, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.09375 = fieldNorm(doc=6430)
0.034297217 = weight(_text_:23 in 6430) [ClassicSimilarity], result of:
0.034297217 = score(doc=6430,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.47518367 = fieldWeight in 6430, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.09375 = fieldNorm(doc=6430)
0.034297217 = weight(_text_:23 in 6430) [ClassicSimilarity], result of:
0.034297217 = score(doc=6430,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.47518367 = fieldWeight in 6430, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.09375 = fieldNorm(doc=6430)
0.15 = coord(3/20)
- Date
- 13. 5.1996 21:43:23
-
Losada, D.E.; Barreiro, A.: Emebedding term similarity and inverse document frequency into a logical model of information retrieval (2003)
0.02
0.015174066 = product of:
0.07587033 = sum of:
0.022864813 = weight(_text_:23 in 1422) [ClassicSimilarity], result of:
0.022864813 = score(doc=1422,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.31678912 = fieldWeight in 1422, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.0625 = fieldNorm(doc=1422)
0.022864813 = weight(_text_:23 in 1422) [ClassicSimilarity], result of:
0.022864813 = score(doc=1422,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.31678912 = fieldWeight in 1422, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.0625 = fieldNorm(doc=1422)
0.022864813 = weight(_text_:23 in 1422) [ClassicSimilarity], result of:
0.022864813 = score(doc=1422,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.31678912 = fieldWeight in 1422, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.0625 = fieldNorm(doc=1422)
0.007275887 = product of:
0.02182766 = sum of:
0.02182766 = weight(_text_:22 in 1422) [ClassicSimilarity], result of:
0.02182766 = score(doc=1422,freq=2.0), product of:
0.07052079 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.02013827 = queryNorm
0.30952093 = fieldWeight in 1422, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=1422)
0.33333334 = coord(1/3)
0.2 = coord(4/20)
- Date
- 22. 3.2003 19:27:23
-
Fuhr, N.: Modelle im Information Retrieval (2023)
0.01
0.0149902 = product of:
0.074951 = sum of:
0.01221984 = weight(_text_:und in 800) [ClassicSimilarity], result of:
0.01221984 = score(doc=800,freq=10.0), product of:
0.044633795 = queryWeight, product of:
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.02013827 = queryNorm
0.27378 = fieldWeight in 800, product of:
3.1622777 = tf(freq=10.0), with freq of:
10.0 = termFreq=10.0
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.0390625 = fieldNorm(doc=800)
0.04225093 = weight(_text_:methoden in 800) [ClassicSimilarity], result of:
0.04225093 = score(doc=800,freq=4.0), product of:
0.10436003 = queryWeight, product of:
5.1821747 = idf(docFreq=674, maxDocs=44218)
0.02013827 = queryNorm
0.4048574 = fieldWeight in 800, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
5.1821747 = idf(docFreq=674, maxDocs=44218)
0.0390625 = fieldNorm(doc=800)
0.013597167 = weight(_text_:der in 800) [ClassicSimilarity], result of:
0.013597167 = score(doc=800,freq=12.0), product of:
0.044984195 = queryWeight, product of:
2.2337668 = idf(docFreq=12875, maxDocs=44218)
0.02013827 = queryNorm
0.30226544 = fieldWeight in 800, product of:
3.4641016 = tf(freq=12.0), with freq of:
12.0 = termFreq=12.0
2.2337668 = idf(docFreq=12875, maxDocs=44218)
0.0390625 = fieldNorm(doc=800)
0.0068830615 = product of:
0.013766123 = sum of:
0.013766123 = weight(_text_:29 in 800) [ClassicSimilarity], result of:
0.013766123 = score(doc=800,freq=2.0), product of:
0.070840135 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.02013827 = queryNorm
0.19432661 = fieldWeight in 800, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.0390625 = fieldNorm(doc=800)
0.5 = coord(1/2)
0.2 = coord(4/20)
- Abstract
- Information-Retrieval-Modelle -(IR-Modelle) spezifizieren, wie zu einer gegebenen Anfrage die Antwortdokumente aus einer Dokumentenkollektion bestimmt werden. Ausgangsbasis jedes Modells sind dabei zunächst bestimmte Annahmen über die Wissensrepräsentation (s. Teil B Methoden und Systeme der Inhaltserschließung) von Fragen und Dokumenten. Hier bezeichnen wir die Elemente dieser Repräsentationen als Terme, wobei es aus der Sicht des Modells egal ist, wie diese Terme aus dem Dokument (und analog aus der von Benutzenden eingegebenen Anfrage) abgeleitet werden: Bei Texten werden hierzu häufig computerlinguistische Methoden eingesetzt, aber auch komplexere automatische oder manuelle Erschließungsverfahren können zur Anwendung kommen. Repräsentationen besitzen ferner eine bestimmte Struktur. Ein Dokument wird meist als Menge oder Multimenge von Termen aufgefasst, wobei im zweiten Fall das Mehrfachvorkommen berücksichtigt wird. Diese Dokumentrepräsentation wird wiederum auf eine sogenannte Dokumentbeschreibung abgebildet, in der die einzelnen Terme gewichtet sein können. Im Folgenden unterscheiden wir nur zwischen ungewichteter (Gewicht eines Terms ist entweder 0 oder 1) und gewichteter Indexierung (das Gewicht ist eine nichtnegative reelle Zahl). Analog dazu gibt es eine Fragerepräsentation; legt man eine natürlichsprachige Anfrage zugrunde, so kann man die o. g. Verfahren für Dokumenttexte anwenden. Alternativ werden auch grafische oder formale Anfragesprachen verwendet, wobei aus Sicht der Modelle insbesondere deren logische Struktur (etwa beim Booleschen Retrieval) relevant ist. Die Fragerepräsentation wird dann in eine Fragebeschreibung überführt.
- Date
- 24.11.2022 17:20:29
- Source
- Grundlagen der Informationswissenschaft. Hrsg.: Rainer Kuhlen, Dirk Lewandowski, Wolfgang Semar und Christa Womser-Hacker. 7., völlig neu gefasste Ausg
-
Courtois, M.P.; Berry, M.W.: Results ranking in Web search engines (1999)
0.01
0.012861458 = product of:
0.08574305 = sum of:
0.028581016 = weight(_text_:23 in 3726) [ClassicSimilarity], result of:
0.028581016 = score(doc=3726,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.3959864 = fieldWeight in 3726, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.078125 = fieldNorm(doc=3726)
0.028581016 = weight(_text_:23 in 3726) [ClassicSimilarity], result of:
0.028581016 = score(doc=3726,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.3959864 = fieldWeight in 3726, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.078125 = fieldNorm(doc=3726)
0.028581016 = weight(_text_:23 in 3726) [ClassicSimilarity], result of:
0.028581016 = score(doc=3726,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.3959864 = fieldWeight in 3726, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.078125 = fieldNorm(doc=3726)
0.15 = coord(3/20)
- Source
- Online. 23(1999) no.3, S.39-46
-
Weinstein, A.: Hochprozentig : Tipps and tricks für ein Top-Ranking (2002)
0.01
0.012861458 = product of:
0.08574305 = sum of:
0.028581016 = weight(_text_:23 in 1083) [ClassicSimilarity], result of:
0.028581016 = score(doc=1083,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.3959864 = fieldWeight in 1083, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.078125 = fieldNorm(doc=1083)
0.028581016 = weight(_text_:23 in 1083) [ClassicSimilarity], result of:
0.028581016 = score(doc=1083,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.3959864 = fieldWeight in 1083, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.078125 = fieldNorm(doc=1083)
0.028581016 = weight(_text_:23 in 1083) [ClassicSimilarity], result of:
0.028581016 = score(doc=1083,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.3959864 = fieldWeight in 1083, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.078125 = fieldNorm(doc=1083)
0.15 = coord(3/20)
- Date
- 23. 8.2002 9:48:37
-
Ruthven, I.; Lalmas, M.: Selective relevance feedback using term characteristics (1999)
0.01
0.012861458 = product of:
0.08574305 = sum of:
0.028581016 = weight(_text_:23 in 3824) [ClassicSimilarity], result of:
0.028581016 = score(doc=3824,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.3959864 = fieldWeight in 3824, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.078125 = fieldNorm(doc=3824)
0.028581016 = weight(_text_:23 in 3824) [ClassicSimilarity], result of:
0.028581016 = score(doc=3824,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.3959864 = fieldWeight in 3824, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.078125 = fieldNorm(doc=3824)
0.028581016 = weight(_text_:23 in 3824) [ClassicSimilarity], result of:
0.028581016 = score(doc=3824,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.3959864 = fieldWeight in 3824, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.078125 = fieldNorm(doc=3824)
0.15 = coord(3/20)
- Source
- Vocabulary as a central concept in digital libraries: interdisciplinary concepts, challenges, and opportunities : proceedings of the Third International Conference an Conceptions of Library and Information Science (COLIS3), Dubrovnik, Croatia, 23-26 May 1999. Ed. by T. Arpanac et al
-
Chang, R.: ¬The development of indexing technology (1993)
0.01
0.012606291 = product of:
0.08404194 = sum of:
0.028013978 = weight(_text_:software in 7024) [ClassicSimilarity], result of:
0.028013978 = score(doc=7024,freq=2.0), product of:
0.07989157 = queryWeight, product of:
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.02013827 = queryNorm
0.35064998 = fieldWeight in 7024, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.0625 = fieldNorm(doc=7024)
0.028013978 = weight(_text_:software in 7024) [ClassicSimilarity], result of:
0.028013978 = score(doc=7024,freq=2.0), product of:
0.07989157 = queryWeight, product of:
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.02013827 = queryNorm
0.35064998 = fieldWeight in 7024, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.0625 = fieldNorm(doc=7024)
0.028013978 = weight(_text_:software in 7024) [ClassicSimilarity], result of:
0.028013978 = score(doc=7024,freq=2.0), product of:
0.07989157 = queryWeight, product of:
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.02013827 = queryNorm
0.35064998 = fieldWeight in 7024, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.0625 = fieldNorm(doc=7024)
0.15 = coord(3/20)
- Source
- Library software review. 12(1993) no.3, S.30-35
-
Van der Veer Martens, B.; Fleet, C. van: Opening the black box of "relevance work" : a domain analysis (2012)
0.01
0.011621411 = product of:
0.058107052 = sum of:
0.017148608 = weight(_text_:23 in 247) [ClassicSimilarity], result of:
0.017148608 = score(doc=247,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.23759183 = fieldWeight in 247, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.046875 = fieldNorm(doc=247)
0.017148608 = weight(_text_:23 in 247) [ClassicSimilarity], result of:
0.017148608 = score(doc=247,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.23759183 = fieldWeight in 247, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.046875 = fieldNorm(doc=247)
0.017148608 = weight(_text_:23 in 247) [ClassicSimilarity], result of:
0.017148608 = score(doc=247,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.23759183 = fieldWeight in 247, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.046875 = fieldNorm(doc=247)
0.006661224 = weight(_text_:der in 247) [ClassicSimilarity], result of:
0.006661224 = score(doc=247,freq=2.0), product of:
0.044984195 = queryWeight, product of:
2.2337668 = idf(docFreq=12875, maxDocs=44218)
0.02013827 = queryNorm
0.14807922 = fieldWeight in 247, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.2337668 = idf(docFreq=12875, maxDocs=44218)
0.046875 = fieldNorm(doc=247)
0.2 = coord(4/20)
- Date
- 11. 6.2012 14:23:00
-
Shiri, A.A.; Revie, C.: Query expansion behavior within a thesaurus-enhanced search environment : a user-centered evaluation (2006)
0.01
0.011414727 = product of:
0.057073634 = sum of:
0.017508736 = weight(_text_:software in 56) [ClassicSimilarity], result of:
0.017508736 = score(doc=56,freq=2.0), product of:
0.07989157 = queryWeight, product of:
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.02013827 = queryNorm
0.21915624 = fieldWeight in 56, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.0390625 = fieldNorm(doc=56)
0.017508736 = weight(_text_:software in 56) [ClassicSimilarity], result of:
0.017508736 = score(doc=56,freq=2.0), product of:
0.07989157 = queryWeight, product of:
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.02013827 = queryNorm
0.21915624 = fieldWeight in 56, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.0390625 = fieldNorm(doc=56)
0.017508736 = weight(_text_:software in 56) [ClassicSimilarity], result of:
0.017508736 = score(doc=56,freq=2.0), product of:
0.07989157 = queryWeight, product of:
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.02013827 = queryNorm
0.21915624 = fieldWeight in 56, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.0390625 = fieldNorm(doc=56)
0.0045474293 = product of:
0.013642288 = sum of:
0.013642288 = weight(_text_:22 in 56) [ClassicSimilarity], result of:
0.013642288 = score(doc=56,freq=2.0), product of:
0.07052079 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.02013827 = queryNorm
0.19345059 = fieldWeight in 56, 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=56)
0.33333334 = coord(1/3)
0.2 = coord(4/20)
- Abstract
- The study reported here investigated the query expansion behavior of end-users interacting with a thesaurus-enhanced search system on the Web. Two groups, namely academic staff and postgraduate students, were recruited into this study. Data were collected from 90 searches performed by 30 users using the OVID interface to the CAB abstracts database. Data-gathering techniques included questionnaires, screen capturing software, and interviews. The results presented here relate to issues of search-topic and search-term characteristics, number and types of expanded queries, usefulness of thesaurus terms, and behavioral differences between academic staff and postgraduate students in their interaction. The key conclusions drawn were that (a) academic staff chose more narrow and synonymous terms than did postgraduate students, who generally selected broader and related terms; (b) topic complexity affected users' interaction with the thesaurus in that complex topics required more query expansion and search term selection; (c) users' prior topic-search experience appeared to have a significant effect on their selection and evaluation of thesaurus terms; (d) in 50% of the searches where additional terms were suggested from the thesaurus, users stated that they had not been aware of the terms at the beginning of the search; this observation was particularly noticeable in the case of postgraduate students.
- Date
- 22. 7.2006 16:32:43
-
Kelledy, F.; Smeaton, A.F.: Signature files and beyond (1996)
0.01
0.011380549 = product of:
0.056902744 = sum of:
0.017148608 = weight(_text_:23 in 6973) [ClassicSimilarity], result of:
0.017148608 = score(doc=6973,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.23759183 = fieldWeight in 6973, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.046875 = fieldNorm(doc=6973)
0.017148608 = weight(_text_:23 in 6973) [ClassicSimilarity], result of:
0.017148608 = score(doc=6973,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.23759183 = fieldWeight in 6973, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.046875 = fieldNorm(doc=6973)
0.017148608 = weight(_text_:23 in 6973) [ClassicSimilarity], result of:
0.017148608 = score(doc=6973,freq=2.0), product of:
0.07217676 = queryWeight, product of:
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.02013827 = queryNorm
0.23759183 = fieldWeight in 6973, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5840597 = idf(docFreq=3336, maxDocs=44218)
0.046875 = fieldNorm(doc=6973)
0.005456915 = product of:
0.016370745 = sum of:
0.016370745 = weight(_text_:22 in 6973) [ClassicSimilarity], result of:
0.016370745 = score(doc=6973,freq=2.0), product of:
0.07052079 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.02013827 = queryNorm
0.23214069 = fieldWeight in 6973, 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=6973)
0.33333334 = coord(1/3)
0.2 = coord(4/20)
- Source
- Information retrieval: new systems and current research. Proceedings of the 16th Research Colloquium of the British Computer Society Information Retrieval Specialist Group, Drymen, Scotland, 22-23 Mar 94. Ed.: R. Leon
-
Keen, M.: Query reformulation in ranked output interaction (1994)
0.01
0.011030504 = product of:
0.07353669 = sum of:
0.02451223 = weight(_text_:software in 1065) [ClassicSimilarity], result of:
0.02451223 = score(doc=1065,freq=2.0), product of:
0.07989157 = queryWeight, product of:
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.02013827 = queryNorm
0.30681872 = fieldWeight in 1065, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.0546875 = fieldNorm(doc=1065)
0.02451223 = weight(_text_:software in 1065) [ClassicSimilarity], result of:
0.02451223 = score(doc=1065,freq=2.0), product of:
0.07989157 = queryWeight, product of:
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.02013827 = queryNorm
0.30681872 = fieldWeight in 1065, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.0546875 = fieldNorm(doc=1065)
0.02451223 = weight(_text_:software in 1065) [ClassicSimilarity], result of:
0.02451223 = score(doc=1065,freq=2.0), product of:
0.07989157 = queryWeight, product of:
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.02013827 = queryNorm
0.30681872 = fieldWeight in 1065, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.0546875 = fieldNorm(doc=1065)
0.15 = coord(3/20)
- Abstract
- Reports on a research project to evaluate and compare Boolean searching and methods of query reformulation using ranked output retrieval. Illustrates the design and operating features of the ranked output system, called ROSE (Ranked Output Search Engine), by means of typical results obtained by searching a database of 1239 records on the subject of cystic fibrosis. Concludes that further work is needed to determine the best reformulation tactics needed to harness the professional searcher's intelligence with that much more limited intelligence provided by the search software
-
Wollf, J.G.: ¬A scalable technique for best-match retrieval of sequential information using metrics-guided search (1994)
0.01
0.011030504 = product of:
0.07353669 = sum of:
0.02451223 = weight(_text_:software in 5334) [ClassicSimilarity], result of:
0.02451223 = score(doc=5334,freq=2.0), product of:
0.07989157 = queryWeight, product of:
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.02013827 = queryNorm
0.30681872 = fieldWeight in 5334, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.0546875 = fieldNorm(doc=5334)
0.02451223 = weight(_text_:software in 5334) [ClassicSimilarity], result of:
0.02451223 = score(doc=5334,freq=2.0), product of:
0.07989157 = queryWeight, product of:
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.02013827 = queryNorm
0.30681872 = fieldWeight in 5334, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.0546875 = fieldNorm(doc=5334)
0.02451223 = weight(_text_:software in 5334) [ClassicSimilarity], result of:
0.02451223 = score(doc=5334,freq=2.0), product of:
0.07989157 = queryWeight, product of:
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.02013827 = queryNorm
0.30681872 = fieldWeight in 5334, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9671519 = idf(docFreq=2274, maxDocs=44218)
0.0546875 = fieldNorm(doc=5334)
0.15 = coord(3/20)
- Abstract
- Describes a new technique for retrieving information by finding the best match or matches between a textual query and a textual database. The technique uses principles of beam search with a measure of probability to guide the search and prune the search tree. Unlike many methods for comparing strings, the method gives a set of alternative matches, graded by the quality of the matching. The new technique is embodies in a software simulation SP21 which runs on a conventional computer. Presnts examples showing best-match retrieval of information from a textual database. Presents analytic and emprirical evidence on the performance of the technique. It lends itself well to parallel processing. Discusses planned developments
