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A great amount of research has devoted to cognitive radio (CR) in recent years in order to improve spectrum efficiency. In decentralized CR networks, the CR users are expected to be capable of dynamically and opportunistically accessing unused spectrums in primary networks. However, since the spectrum of primary networks is comparatively wide, it is not realistic for the CR users to sense the entire...
Establishing an appropriate and visual 3D query system of flood submerging could reflect extent of flood disaster directly, it is very important for the sectors of flood-control and disaster-relief, which they can determine disaster-relief target and planning. Due to problems with application of GIS on flood-control and disaster-relief, based on the topographic map of Fuzhou city, we established related...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.