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Cognitive radio is a promising technology to solve the spectrum scarcity problem. In a cognitive radio network, a secondary user (SU) first senses a specific range of the spectrum to get its available channels and two SUs need to rendezvous on a common available channel to establish a physical link for communications. The spectrum band allocated for existing wireless services is very wide. However,...
This paper proposes a new environmental friendly evaluation criterion to assess the comprehensive performance of coal-fired power plant. The new evaluation criterion, which is called the comprehensive Index of Energy, Resources and Environment (IERE), can synthetically evaluate the thermal, economical and environmental performance of power plants. Based on the new criterion, the paper analyzes the...
According to the relationships among the change of generator production, energy margin and change of branch power flow, the combination of production change of all generators and the upper and lower limits of branch restriction are first computed by the non-linear programming. And then, based on the branch restriction, the assessment indexes of branch vulnerability are founded. One of the advantages...
Risks and uncertainties are ever more noted and factored into decision making today, and those stemming from logistics are prominent in the competitiveness and viability of enterprises. However, there is still a lack of research about the early warning indicator system (EWIS) of enterprise logistics risk. While supply chain management (SCM) has become such a popular topic in modern business management...
The genetic diversity and differentiation between wild and hatchery Haliotis asinina populations were tested by allozyme and AFLP techniques. The results from allozyme technique showed that there was a decline in mean number of alleles per locus, percentage of polymorphic loci and observed heterozygosity and a change in allele frequency in three loci, SDH-1, AAT-1 and EST-1. Allelic richness, percentage...
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