3652 search results - page 238 / 731 » A study of query length |
ICDE
2005
IEEE
14 years 9 months ago
2005
IEEE
Vertical partitioning is a well-known technique for optimizing query performance in relational databases. An extreme form of this technique, which we call vectorization, is to sto...
SIGMOD
2004
ACM
14 years 8 months ago
2004
ACM
In this paper, we study query evaluation on Active XML documents (AXML for short), a new generation of XML documents that has recently gained popularity. AXML documents are XML do...
EDBT
2008
ACM
14 years 8 months ago
2008
ACM
Index trees created using distance based indexing are difficult to maintain online since the distance function involved is often costly to compute. This problem is intensified whe...
MOBIHOC
2008
ACM
14 years 8 months ago
2008
ACM
Demands on better interacting with physical world require an effective and comprehensive collaboration mechanism among multiple heterogeneous sensor networks. Previous works mainl...
ECIR
2009
Springer
14 years 5 months ago
2009
Springer
Abstract. In this paper, we examine a number of newly applied methods for combining pre-retrieval query performance predictors in order to obtain a better prediction of the queryâ€...