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In recent years, the sustainable development of China's B2B E-commerce has promoted the trade of steel, coal and other commodities, and brought new opportunities and a comprehensive upgrade for the industrial chain where both upstream enterprises and downstream enterprises in, and also attracted a large number of enterprises to join in. Among them, due to their own advantage, the large enterprises...
In this paper, a novel wideband sleeve dipole array antenna with high gain and good omni-directional radiation characteristic was proposed for mobile communication applications. The dipole sleeve was made up of outer with conical gradient structure and inner sleeve with cylinder. The measured results of the proposed array antenna show the gain more than 8.2dBi at 2.5GHz, and the return loss less than...
Along with the sharp increase of vehicle number in China, it is very important to realize the traffic safety, transportation efficiency and travelling comfort, especially on the highway. Leaky coaxial cable is widely used in mobile communication of some blind zone such as tunnels and underground areas, and there is another application of this cable: it can also provide road vehicle communication in...
In order to improve quality of service (QoS) of wireless environment in scene-based mobile social network service (mobile SNS), a novel prefetching method is proposed in this paper. Utilizing this method, prefetching decisions are made based on the relationship among users and access histories recorded in the client. When the user is viewing the scene or other components, client is allowed to prefetch...
This paper analyses the two common routing protocols, AODV and DSR in Ad-Hoc network. On the OPNET network simulation platform, a systematically simulation and research has been carried out on the performance of two routing protocols, and how the network environments impact on the performance of routing protocol. The packet delivery ratio and average delay of these two indicators have been selected...
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