2714 search results - page 113 / 543 » On the Notion of Value Object |
142
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GEOINFO
2007
15 years 7 months ago
2007
In this paper we are interested in storing and perform OLAP queries about various aggregate trajectory properties. We consider a data stream environment where a set of mobile objec...
150
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DEDS
2010
15 years 6 months ago
2010
We study approaches that fit a linear combination of basis functions to the continuation value function of an optimal stopping problem and then employ a greedy policy based on the...
166
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ICDT
1999
ACM
15 years 10 months ago
1999
ACM
Abstract. In this paper we present a new approach for studying aggregations in the context of database query languages. Starting from a broad de nition of aggregate function, we ad...
139
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IDEAS
1998
IEEE
15 years 10 months ago
1998
IEEE
In this paper, we introduce a prewrite operation before a write operation in a mobile transaction to improve data availability. A prewrite operation does not update the state of a...
148
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AIMSA
2000
Springer
15 years 10 months ago
2000
Springer
Abstract. Decision trees are considered as an efficient technique to express classification knowledge and to use it. However, their most standard algorithms do not deal with uncert...