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» Containment of Aggregate Queries
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WSNA
2003
ACM
15 years 9 months ago
Asymptotically optimal time synchronization in dense sensor networks
We consider the problem of synchronization of all clocks in a sensor network, in the regime of asymptotically high node densities. We formulate this problem as one in which all cl...
An-Swol Hu, Sergio D. Servetto
DOLAP
2005
ACM
15 years 6 months ago
Towards a spatial multidimensional model
Data warehouses and OLAP systems help to interactively analyze huge volume of data. This data, extracted from transactional databases, frequently contains spatial information whic...
Sandro Bimonte, Anne Tchounikine, Maryvonne Miquel
GAMESEC
2010
136views Game Theory» more  GAMESEC 2010»
15 years 2 months ago
Effective Multimodel Anomaly Detection Using Cooperative Negotiation
Abstract. Many computer protection tools incorporate learning techniques that build mathematical models to capture the characteristics of system's activity and then check whet...
Alberto Volpatto, Federico Maggi, Stefano Zanero
SIGMOD
2009
ACM
147views Database» more  SIGMOD 2009»
16 years 4 months ago
XML keyword query refinement
Existing works in XML keyword search have addressed the problem of finding matching results of a query. However, user input queries always contain irrelevant or mismatched terms, ...
Jiaheng Lu, Zhifeng Bao, Tok Wang Ling, Xiaofeng M...
DEXA
1998
Springer
124views Database» more  DEXA 1998»
15 years 8 months ago
Indexing Time-Series Databases for Inverse Queries
Abstract. In this paper we examine the problem of indexing time sequences in order to answer inverse queries. An inverse query computes all the time points at which the sequence co...
Alexandros Nanopoulos, Yannis Manolopoulos