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Recently, extensive research has shown the benefits of cognitive radio technologies which improve the efficiency and flexibility of spectrum utilization. In other words, cognitive radio is a candidate technology for more efficient spectrum utilization systems based on the opportunistic spectrum sensing. Cognitive radio technology does not rely upon traditional license-based spectrum allocation policies,...
The evaluation of the risk of underground gas pipeline can provide effective decision support aid. It is crucial to the establishment of a comprehensive safety evaluation and management system for the urban underground gas pipeline. This paper presents a method of GIS-based fuzzy comprehensive evaluation on underground gas pipeline risk and elaborates the flow of fuzzy risk evaluation in detail. Meanwhile,...
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