The hierarchical hub location problem is encountered three-level network that is applied in production-distribution system, education system, emergency medical services, telecommunication network, etc. This paper addresses the hierarchical hub covering problem with single assignment accounting for mandatory dispersion of central hubs restriction as a special case. This formulation with incorpor...

Many approaches have been proposed to pre-compute data cubes in order efficiently respond OLAP queries warehouses. However, few solutions integrating all of the possible outcomes, and it is this idea that leads integration hierarchical dimensions into these responses. To meet need, we propose, paper, a complete redefinition framework formal definition traditional database analysis through prism...