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» On Relationships Between Query Models
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GEOS
2009
Springer
14 years 1 months ago
SPARQL Query Re-writing Using Partonomy Based Transformation Rules
Abstract. Often the information present in a spatial knowledge base is represented at a different level of granularity and abstraction than the query constraints. For querying onto...
Prateek Jain, Peter Z. Yeh, Kunal Verma, Cory A. H...
ISD
1999
Springer
262views Database» more  ISD 1999»
14 years 1 months ago
Spatial Pictogram Enhanced Conceptual Data Models and Their Translation to Logical Data Models
The successful development of any geographic information system project needs the careful design and implementation of spatial databases via conceptual and logical data-modeling. T...
Shashi Shekhar, Ranga Raju Vatsavai, Sanjay Chawla...
ICDT
1995
ACM
101views Database» more  ICDT 1995»
14 years 8 days ago
Approximation in Databases
Partial information in databases can arise when information from several databases is combined. Even if each database is complete for some \world", the combined databases wil...
Leonid Libkin
SERA
2005
Springer
14 years 2 months ago
Bridging the Gap between Analysis and Design Using Dependency Diagrams
Requirements specifications often make use of a number of scenarios that are interrelated and that depend on each other in many ways. However, they are often treated separately, o...
Simona Vasilache, Jiro Tanaka
ICASSP
2011
IEEE
13 years 14 days ago
Impact of the correlation between forward and backscatter channels on RFID system performance
The channel of radio frequency identi cation (RFID) can be modeled as a cascaded channel consisting of a forward link and a backscatter link. The correlation between the forward a...
Chen He, Z. Jane Wang