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DMDW
2001
194views Management» more  DMDW 2001»
15 years 1 months ago
Logical Multidimensional Database Design for Ragged and Unbalanced Aggregation
Research on logical design of OLAP cubes has tended to assume that the rollup hierarchy in a cube dimension takes the form of a balanced tree. However, experience from industry in...
Tapio Niemi, Jyrki Nummenmaa, Peter Thanisch
CORR
2010
Springer
173views Education» more  CORR 2010»
14 years 12 months ago
Towards Conceptual Multidimensional Design in Decision Support Systems
Multidimensional databases support efficiently on-line analytical processing (OLAP). In this paper, we depict a model dedicated to multidimensional databases. The approach we prese...
Olivier Teste
IPCO
2007
98views Optimization» more  IPCO 2007»
15 years 1 months ago
Scheduling with Precedence Constraints of Low Fractional Dimension
Abstract. We consider the single machine scheduling problem to minimize the average weighted completion time under precedence constrains. Improving on the various 2-approximation a...
Christoph Ambühl, Monaldo Mastrolilli, Nikola...
CP
2005
Springer
15 years 5 months ago
Dimensioning an Inbound Call Center Using Constraint Programming
One of the critical problems in the call center industries is the staffing problem since they must face variable demands and because staff costs represent a major part of the cost...
Cyril Canon, Jean-Charles Billaut, Jean-Louis Bouq...
MOBICOM
2005
ACM
15 years 5 months ago
An analytical model for the dimensioning of a GPRS/EDGE network with a capacity constraint on a group of cells
This paper is a contribution to the generic problem of having simple and accurate models to dimension radio cells with data traffic on a GPRS or EDGE network. It addresses the iss...
Georges Nogueira, Bruno Baynat, Pierre Eisenmann