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GNU Radio is a free and open-source software development toolkit that provides signal processing blocks to implement software radios. Through its operation and signal processing module, an ordinary PC can implement modern communication process, codec, time and frequency synchronization process in a flexible manner. Because of the high cost of traditional(More)
Social relations between users is a key factor impacting the willingness of users to participate in D2D delivery. However, close social ties and proximity location of users can not always be satisfied due to the time and space limits. In this paper, we introduce social credit to stimulate selfish users for an active D2D communication networks, which is a(More)
A deposition process has been developed to fabricate a complete-monolayer Pt coating on a large-surface-area three-dimensional (3D) Ni foam substrate using a buffer layer (Ag or Au) strategy. The quartz crystal microbalance, current density analysis, cyclic voltammetry integration, and X-ray photoelectron spectroscopy results show that the monolayer(More)
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