4397 search results - page 426 / 880 » Relational Algebra Operations |
172
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IJCIS
1998
15 years 6 months ago
1998
The problem of integrating information from con icting sources comes up in many current applications, such as cooperative information systems, heterogeneous databases, and multi-a...
263
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JMIV
2002
15 years 6 months ago
2002
Motivated by operators simplifying the topographic map of a function, we study the theoretical properties of two kinds of "grain" filters. The first category, discovered ...
165
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ORL
2002
15 years 6 months ago
2002
Dial-a-Ride systems involve dispatching a vehicle to satisfy demands from a set of customers who call a vehicle operating agency requesting that an item be picked up from a specif...
215
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AMSTERDAM
2009
15 years 4 months ago
2009
Because (of) is ambiguous between a `reason' and a `plain cause' interpretation. Presenting a semantic analysis within the framework of Discourse Representation Theory, I...
222
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FAST
2009
15 years 4 months ago
2009
We present a formalism for provenance in distributed systems based on the -calculus. Its main feature is that all data products are annotated with metadata representing their prov...