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SIGMOD
2008
ACM
122views Database» more  SIGMOD 2008»
14 years 8 months ago
Building query optimizers for information extraction: the SQoUT project
Text documents often embed data that is structured in nature. This structured data is increasingly exposed using information extraction systems, which generate structured relation...
Alpa Jain, Panagiotis G. Ipeirotis, Luis Gravano
SIGMOD
2004
ACM
163views Database» more  SIGMOD 2004»
14 years 7 months ago
Constraint-Based XML Query Rewriting For Data Integration
We study the problem of answering queries through a target schema, given a set of mappings between one or more source schemas and this target schema, and given that the data is at...
Cong Yu, Lucian Popa
ICC
2007
IEEE
180views Communications» more  ICC 2007»
14 years 2 months ago
Distributed Quad-Tree for Spatial Querying in Wireless Sensor Networks
— In contrast to the traditional wireless sensor network (WSN) applications that perform only data collection and aggregation, new generation of information processing applicatio...
Murat Demirbas, Xuming Lu
ICMCS
2006
IEEE
124views Multimedia» more  ICMCS 2006»
14 years 1 months ago
Combining Textual and Visual Ontologies to Solve Medical Multimodal Queries
In order to solve medical multimodal queries, we propose to split the queries in different dimensions using ontology. We extract both textual and visual terms depending on the ont...
Saïd Radhouani, Joo-Hwee Lim, Jean-Pierre Che...
CCGRID
2005
IEEE
14 years 1 months ago
Servicing range queries on multidimensional datasets with partial replicas
Partial replication is one type of optimization to speed up execution of queries submitted to large datasets. In partial replication, a portion of the dataset is extracted, re-org...
Li Weng, Ümit V. Çatalyürek, Tahs...