Sciweavers

708 search results - page 105 / 142
» Optimizing SQL Queries over Text Databases
Sort
View
IR
2007
13 years 8 months ago
Lightweight natural language text compression
Variants of Huffman codes where words are taken as the source symbols are currently the most attractive choices to compress natural language text databases. In particular, Tagged...
Nieves R. Brisaboa, Antonio Fariña, Gonzalo...
BTW
2007
Springer
164views Database» more  BTW 2007»
14 years 3 months ago
Integrating Structural Joins into a Tuple-Based XPath Algebra
: Over the recent years, very little effort has been made to give XPath a proper algebraic treatment. The only laudable exception is the Natix Algebra (NAL) which defines the tran...
Christian Mathis
SIGMOD
2001
ACM
108views Database» more  SIGMOD 2001»
14 years 9 months ago
PREFER: A System for the Efficient Execution of Multi-parametric Ranked Queries
Users often need to optimize the selection of objects by appropriately weighting the importance of multiple object attributes. Such optimization problems appear often in operation...
Vagelis Hristidis, Nick Koudas, Yannis Papakonstan...
AAAI
1996
13 years 10 months ago
Discovering Robust Knowledge from Dynamic Closed World Data
Many applications of knowledge discovery require the knowledge to be consistent with data. Examples include discovering rules for query optimization, database integration, decisio...
Chun-Nan Hsu, Craig A. Knoblock
ICDE
2008
IEEE
121views Database» more  ICDE 2008»
14 years 10 months ago
Optimizing Hierarchical Access in OLAP Environment
In Online Analytic Processing (OLAP) deployments, different users, lines of businesses and business units often create adhoc aggregation hierarchies tailor-made for specific report...
Lipyeow Lim, Bishwaranjan Bhattacharjee