5221 search results - page 177 / 1045 » An On-line Problem Database |
147
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DEXA
2010
Springer
15 years 5 months ago
2010
Springer
We consider the containment problem for conjunctive queries with atomic negation. Firstly, we refine an existing algorithm based on homomorphism checks, which itself improves other...
243
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ICDE
2004
IEEE
16 years 6 months ago
2004
IEEE
Recent advances in research fields like multimedia and bioinformatics have brought about a new generation of hyper-dimensional databases which can contain hundreds or even thousan...
149
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ACMSE
2006
ACM
15 years 11 months ago
2006
ACM
SQL injection attacks potentially affect all applications, especially web applications, that utilize a database backend. While these attacks are generally against the application...
225
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CDB
1997
Springer
15 years 9 months ago
1997
Springer
We consider two-dimensional spatial databases defined in terms of polynomial inequalities and investigate the expressibility of the topological connectivity query for these databa...
198
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ACIIDS
2012
IEEE
14 years 26 days ago
2012
IEEE
This paper introduces an improved evolutionary algorithm based on the Imperialist Competitive Algorithm (ICA), called Quad Countries Algorithm (QCA). The Imperialist Competitive Al...