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Fuhr, N.; Niewelt, B.: ¬Ein Retrievaltest mit automatisch indexierten Dokumenten (1984) 0.04

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Date: 20.10.2000 12:22:23

Ammersbach, K.; Fuhr, N.; Knorz, G.: Empirisch gestützte Konzeption einer neuen Generation von Werkstoffdatenbanken (1988) 0.02

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Source: Von der Information zum Wissen - vom Wissen zur Information: traditionelle und moderne Informationssysteme für Wissenschaft und Praxis, Deutscher Dokumentartag 1987, Bad Dürkheim, vom 23.-25.9.1987. Hrsg.: H. Strohl-Goebel

Biebricher, P.; Fuhr, N.; Lustig, G.; Schwantner, M.; Knorz, G.: ¬Das automatische Indexierungssystem AIR/PHYS (1988) 0.02

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Source: Von der Information zum Wissen - vom Wissen zur Information: traditionelle und moderne Informationssysteme für Wissenschaft und Praxis, Deutscher Dokumentartag 1987, Bad Dürkheim, vom 23.-25.9.1987. Hrsg.: H. Strohl-Goebel

Schaefer, A.; Jordan, M.; Klas, C.-P.; Fuhr, N.: Active support for query formulation in virtual digital libraries : a case study with DAFFODIL (2005) 0.01

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Date: 16.11.2008 17:23:50
Source: Research and advanced technology for digital libraries : 9th European conference, ECDL 2005, Vienna, Austria, September 18-23, 2005 ; proceedings / Andreas Rauber ... (eds.)

Fuhr, N.: Modelle im Information Retrieval (2023) 0.01

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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

Fuhr, N.: Konzepte zur Gestaltung zukünftiger Information-Retrieval-Systeme (1992) 0.00

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Fuhr, N.: Repräsentationen und Anfragefunktionalität in multimedialen Informationssystemen (1990) 0.00
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Abstract

Multimediale Informationssysteme (MMIS) verwalten sowohl formatierte Daten als auch multimediale Dokumente und Regeln oder logische Formeln. Im Gegensatz zu Faktendatenbanken kann dabei die Repräsentation der zu verwaltenden Objekte nicht mehr als korrekt und vollständig angenommen werden. Dementsprechend wird die Beantwortung von Anfragen an solche Systeme als unsichere Inferenz aufgefaßt. Es wird aufgezeigt, wie das dazu benötigte unsicher Wissen durch Lernverfahren aus Relevance-Feedback-Daten gewonnen werden kann. Sowohl diese Unsicherheit als auch die interaktive Nutzung von MMIS erfordern zusätzliche Anfragefunktionen wie Frageformulierungshilfen, Browsing, Ranking, Zooming und Relevance Feedback

Fuhr, N.: Ranking-Experimente mit gewichteter Indexierung (1986) 0.00

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Date: 14. 6.2015 22:12:44

Fuhr, N.: Rankingexperimente mit gewichteter Indexierung (1986) 0.00

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Date: 14. 6.2015 22:12:56

Biebricher, N.; Fuhr, N.; Lustig, G.; Schwantner, M.; Knorz, G.: ¬The automatic indexing system AIR/PHYS : from research to application (1988) 0.00

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Date: 16. 8.1998 12:51:22

Klas, C.-P.; Fuhr, N.; Schaefer, A.: Evaluating strategic support for information access in the DAFFODIL system (2004) 0.00

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Date: 16.11.2008 16:22:48

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