685 search results - page 120 / 137 » Efficient Filtering Query Indexing in Data Stream |
JIIS
2008
13 years 7 months ago
2008
In this paper, we study the incremental update of Frequent Closed Itemsets (FCIs) over a sliding window in a high-speed data stream. We propose the notion of semi-FCIs, which is to...
XMLSEC
2003
ACM
14 years 25 days ago
2003
ACM
As a large quantity of information is presented in XML format on the Web, there are increasing demands for XML security. Until now, research on XML security has been focused on th...
ICDE
2006
IEEE
14 years 9 months ago
2006
IEEE
A burst is a large number of events occurring within a certain time window. As an unusual activity, it's a noteworthy phenomenon in many natural and social processes. Many da...
ICDE
2001
IEEE
14 years 9 months ago
2001
IEEE
We consider the problems of computing aggregation queries in temporal databases, and of maintaining materialized temporal aggregate views efficiently. The latter problem is partic...
IDEAS
2000
IEEE
13 years 12 months ago
2000
IEEE
Most operations of the relational algebra or SQL - like projection with duplicate elimination, join, ordering, group by and aggregations - are efficiently processed using a sorted...