At present, lots of work focus on spectrum allocation of wireless networks, and pay little attention about optimization network access. In this paper, we propose a cognitive access selection approach of heterogeneous wireless networks based on fuzzy logic. By means of established access selection factors and its membership functions(MFs), we can access optimal network using presupposition fuzzy rules according to service types. Finally, simulation experiments shown the approach is effective.
Synergy was the core content of urban building complex. The value from it could be divided into three levels: economic value, space value and urban value. The paper discussed the space value via overall efficiency, composite uses, and energy integration, and finally pointed out the misunderstandings throughout the development of urban building complex in main land of China today.
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