4397 search results - page 117 / 880 » Relational Algebra Operations |
TKDE
2012
12 years 20 days ago
2012
—Preparing a data set for analysis is generally the most time consuming task in a data mining project, requiring many complex SQL queries, joining tables and aggregating columns....
RSKT
2007
Springer
14 years 4 months ago
2007
Springer
Abstract. A fundamental data modeling problem in geographical information systems and spatial database systems refers to an appropriate treatment of the vagueness or indeterminacy ...
VLDB
1993
ACM
14 years 2 months ago
1993
ACM
Although scientific data analysis increasingly requires accessandmanipulation of large quantitiesof data,current databasetechnology fails to meet the needsof scientific processing...
ISCI
2010
2010
Generalized continuous and left-continuous t-norms arising from algebraic semantics for fuzzy logics
13 years 8 months ago
This paper focuses on the issue of how generalizations of continuous and leftcontinuous t-norms over linearly ordered sets should be from a logical point of view. Taking into acco...
CORR
2010
Springer
13 years 10 months ago
2010
Springer
Incorporating probabilities into the semantics of incomplete databases has posed many challenges, forcing systems to sacrifice modeling power, scalability, or treatment of relatio...