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Packet routing is important for Vehicular Delay Tolerant Networks (VDTNs).Opportunistic routing algorithms based on historical records are insuciently accurate in forwarder selection due to movement randomness of vehicles. Trajectory-based routing algo- rithms tackle vehicle movement randomness but cannot be directly used in VDTNs due to the dependence on APs. In this paper, we develop a distributed...
Three Dimensional (3D) printing technologies fabricate objects layer by layer. Complex parts, which are difficult to produce by using subtractive manufacture methods, can be created by using these technologies. In a 3D printing process, the digital geometrical description of the target model has to be converted into machine codes to direct the printer to manufacture the model. Since the machine codes...
Research and development (R&D) investment is a kind of strategic behavior filled with high uncertainty and risk. Currently domestic relevant research on the R&D input value mostly emphasizes the enterprise R&D investment impact on shareholder wealth, and less about the trade-off between R&D investment impact on bondholders and shareholders. The present study uses revealed...
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