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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
41

SPARK: a keyword search system on relational databases

Luo, Yi , Computer Science & Engineering, Faculty of Engineering, UNSW January 2009 (has links)
With the increasing usage of storing textual data into relational databases, there is a demand for the databases to support keyword queries over textual data. Due to the normalization and the inherent connections among tuples in different tables, traditional IR-style ranking and query evaluation methods do not apply. A number of systems have been proposed to deal with this issue. In this thesis, I will give a detailed demonstration and description to our SPARK project. In the project, we study both the effectiveness and the efficiency issues of answering top-k keyword query on a relational database system. We propose a new ranking formula by adapting existing IR techniques on a natural notion of ???virtual document???. Compared with previous approaches, our new ranking method is simple yet effective, and agrees with human being???s perception better. We also study efficient query processing methods based on the new ranking method, and propose algorithms that have minimal accesses to the database. We have conducted extensive experiments on large-scale real databases using two popular RDBMSs. The experimental results demonstrate significant improvement to the alternative approaches in terms of both retrieval effectiveness and efficiency. We build a prototype of SPARK system on top of popular RDBMS based on these new techniques to satisfy different kinds of users and to support various query modes.
42

Informationssuche im Internet der Suchprozess aus psychologischer und informationstechnologischer Sicht

Wirschum, Nadine January 2003 (has links)
Zugl.: Saarbrücken, Univ., Diplomarbeit, 2003 u.d.T.: Wirschum, Nadine: Erleichterung der Informationssuche im Internet
43

Interface design for an audio based information retrieval system /

Johnson, James Robert, January 1992 (has links)
Report (M.S.)--Virginia Polytechnic Institute and State University. M.S. 1992. / Vita. Abstract. Includes bibliographical references (leaf 48). Also available via the Internet.
44

Handling Resource Constraints and Scalability in Continuous Query Processing

Xie, Junyi. January 2007 (has links)
Thesis (Ph. D.)--Duke University, 2007.
45

Using provenance to aid document re-finding /

Lonsdale, Heather. January 1900 (has links)
Thesis (M.S.)--Oregon State University, 2010. / Printout. Includes bibliographical references (leaves 53-58). Also available on the World Wide Web.
46

Hybrid keyword search across peer-to-peer federated data

Kim, Jungkee. Riccardi, Greg. January 2005 (has links)
Thesis (Ph. D.)--Florida State University, 2005. / Advisor: Dr. Gregory Riccardi, Florida State University, College of Arts and Sciences, Dept. of Computer Science. Title and description from dissertation home page (viewed June 7, 2005). Document formatted into pages; contains ix, 102 pages. Includes bibliographical references.
47

Inferential relevance and its implications to inferential information retrieval

Park, Hongseok. January 1995 (has links)
Thesis (Ph. D.)--Rutgers, State University of New Jersey, 1995. / eContent provider-neutral record in process. Description based on print version record. Includes bibliography (leaves 212-221).
48

Inferential relevance and its implications to inferential information retrieval

Park, Hongseok. January 1995 (has links)
Thesis (Ph. D.)--Rutgers, State University of New Jersey, 1995. / eContent provider-neutral record in process. Description based on print version record. Includes bibliography (leaves 212-221).
49

Automating the extraction of domain-specific information from the web : a case study for the genealogical domain /

Walker, Troy L., January 2004 (has links)
Thesis (M.S.)--Brigham Young University. Dept. of Computer Science, 2004. / Includes bibliographical references (p. 51-54).
50

The Retrieval Expert Model of informational retrieval

Deerwester, Scott Craig, January 1984 (has links)
Thesis (Ph. D.)--Purdue University, 1984. / Vita. Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 89-91).

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