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Ulrich Pfeifer

dblp:35/5592 · DBLP profile ↗
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5ranked-venue papers
3as first author
0since 2021 · last 1996
—ORCID · none

Domains — the database's venue-derived domains; a paper can count in several

Databases, data management, data science and information retrieval · 4 · 2 first-authorComputer networks · 1 · 1 first-author

Expertise — from the expertise taxonomy: the topics of the expert's papers under the CCF categories. A weight counts papers with recency: 1 for a paper about the topic, 0.3 when the topic is its context, halved every five years.

Databases, data mining, and information retrieval
3 papers
Information retrieval · 100%

Topics — the 7 heaviest of 7, each with the papers that count most for it

TopicWeightPapersLastEvidence papers
Information retrieval › indexing
probabilistic indexing
0.021994
Probabilistic Information Retrieval as a Combination of Abstraction, Inductive Learning, and Probabilistic Assumptions · ACM Trans. Inf. Syst. 1994
Combining Model-Oriented and Description-Oriented Approaches for Probabilistic Indexing · SIGIR 1991
Information retrieval › query understanding
query ambiguity
0.011995
Efficient Processing of Vague Queries using a Data Stream Approach · SIGIR 1995
Information retrieval
query processing
0.011995
Efficient Processing of Vague Queries using a Data Stream Approach · SIGIR 1995
Information retrieval › indexing
document indexing
0.011994
Probabilistic Information Retrieval as a Combination of Abstraction, Inductive Learning, and Probabilistic Assumptions · ACM Trans. Inf. Syst. 1994
Information retrieval › retrieval models
probabilistic retrieval model
0.011994
Probabilistic Information Retrieval as a Combination of Abstraction, Inductive Learning, and Probabilistic Assumptions · ACM Trans. Inf. Syst. 1994
Information retrieval
indexing
0.011991
Combining Model-Oriented and Description-Oriented Approaches for Probabilistic Indexing · SIGIR 1991
Information retrieval
retrieval models
0.011991
Combining Model-Oriented and Description-Oriented Approaches for Probabilistic Indexing · SIGIR 1991

Methods — techniques the papers use, named apart from their topics

data stream processing · 0.0logistic regression · 0.0inductive learning · 0.0abstraction · 0.0
YearPublicationVenuePosition
1996 Retrieval Effectiveness of Proper Name Search Methods
Ulrich Pfeifer, Thomas Poersch, Norbert Fuhr
Inf. Process. Manag.1
1995 Efficient Processing of Vague Queries using a Data Stream Approach
abstract
Article Efficient processing of vague queries using a data stream approach Share on Authors: Ulrich Pfeifer University of Dortmund, Germany University of Dortmund, GermanyView Profile , Norbert Fuhr University of Dortmund, Germany University of Dortmund, GermanyView Profile Authors Info & Claims SIGIR '95: Proceedings of the 18th annual international ACM SIGIR conference on Research and development in information retrievalJuly 1995 Pages 189–197https://doi.org/10.1145/215206.215359Online:01 July 1995Publication History 6citation320DownloadsMetricsTotal Citations6Total Downloads320Last 12 Months3Last 6 weeks1 Get Citation AlertsNew Citation Alert added!This alert has been successfully added and will be sent to:You will be notified whenever a record that you have chosen has been cited.To manage your alert preferences, click on the button below.Manage my AlertsNew Citation Alert!Please log in to your account Save to BinderSave to BinderCreate a New BinderNameCancelCreateExport CitationPublisher SiteGet Access
Ulrich Pfeifer, Norbert Fuhr
SIGIR1
1995 Searching Structured Documents with the Enhanced Retrieval Functionality of freeWAIS-sf and SFgate
Ulrich Pfeifer, Norbert Fuhr, Tung Huynh
Comput. Networks ISDN Syst.1
1994 Probabilistic Information Retrieval as a Combination of Abstraction, Inductive Learning, and Probabilistic Assumptions
abstract
We show that former approaches in probabilistic information retrieval are based on one or two of the three concepts abstraction, inductive learning , and probabilistic assumptions , and we propose a new approach which combines all three concepts. This approach is illustrated for the case of indexing with a controlled vocabulary. For this purpose, we describe a new probabilistic model first, which is then combined with logistic regression, thus yielding a generalization of the original model. Experimental results for the pure theoretical model as well as for heuristic variants are given. Furthermore, linear and logistic regression are compared.
Norbert Fuhr, Ulrich Pfeifer
ACM Trans. Inf. Syst.2
1991 Combining Model-Oriented and Description-Oriented Approaches for Probabilistic Indexing
abstract
We distinguish model-oriented and description-oriented approaches in probabilistic information retrieval.The former refer to certain representations of documents and
Norbert Fuhr, Ulrich Pfeifer
SIGIR2