3241 search results - page 406 / 649 » Searching for Hidden-Web Databases |
204
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FOCS
1998
IEEE
15 years 10 months ago
1998
IEEE
This paper deals with the evaluation of acyclic Boolean conjunctive queries in relational databases. By well-known results of Yannakakis [1981], this problem is solvable in polynom...
177
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VLDB
1999
ACM
15 years 10 months ago
1999
ACM
We describe the architecture of a hypertext resource discovery system using a relational database. Such a system can answer questions that combine page contents, metadata, and hyp...
172
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BIBE
2010
IEEE
15 years 7 months ago
2010
IEEE
- Metagenomics is the study of environmental samples. Because few tools exist for metagenomic analysis, a natural step has been to utilize the popular homology tool, BLAST, to sear...
176
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BMCBI
2008
15 years 6 months ago
2008
Background: Keyword searching through PubMed and other systems is the standard means of retrieving information from Medline. However, ad-hoc retrieval systems do not meet all of t...
210
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BMCBI
2006
15 years 6 months ago
2006
Background: Existing biological databases support a variety of queries such as keyword or definition search. However, they do not provide any measure of relevance for the instance...