AbstrAct OLAP queries are characterized by short answering times. Materialized cube views, a pre-aggregation and storage of group-by values, are one of the possible answers to that condition. However, if all possible views were computed and stored, the amount of necessary materializing time and storage space would be huge. BLOCKINSelecting BLOCKINthe BLOCKINmost BLOCKINbeneficial BLOCKINset, BL...

Contests, NGOs and Decentralizing Aid International donors usually have particular goals they want to achieve with their foreign aid, for example, poverty alleviation. In the international aid story lobbying by potential recipient groups attempting to capture the donor’s support play a potentially important role for nongovernmental organizations. We model this situation as a hierarchical contes...

This paper introduces the Hybrid Architecture of Dynamic Spectrum Allocation in the hierarchical network combining centralized and distributed architecture to get optimum allocation of radio resources. It can limit the interference by interacting dynamically and enhance the spectrum efficiency while maintaining the desired QoS in the network. This paper presented dynamic framework for the inter...

This study examines the carbon reduction investment decisions of electric power energy supply chain considering trading and subsidy policies in China’s “dual carbon” context. By building a three-level system including producers, retailers, consumers, we discuss optimal decision-making problem for three models decentralized decision making without government subsidies, centralized with subsidies...