1452 search results - page 215 / 291 » The Effectiveness of Query Expansion for Distributed Informa... |
JMLR
2008
13 years 7 months ago
2008
We consider a hierarchy of queries about causal relationships in graphical models, where each level in the hierarchy requires more detailed information than the one below. The hie...
NDQA
2003
13 years 9 months ago
2003
The World Wide Web lacks support for explaining information provenance. When web applications return results, many users do not know what information sources were used, when they ...
BTW
2005
Springer
14 years 1 months ago
2005
Springer
: Optimizers in modern DBMSs utilize a cost model to choose an efficient query execution plan (QEP) among all possible ones for a given query. The accuracy of the cost estimates de...
BTW
2007
Springer
14 years 2 months ago
2007
Springer
: Statistics that accurately describe the distribution of data values in the columns of relational tables are essential for effective query optimization in a database management sy...
SIGMOD
2001
ACM
14 years 8 months ago
2001
ACM
Managing multiple versions of XML documents represents an important problem, because of many applications ranging from traditional ones, such as software configuration control, to...