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Wireless underground sensor networks (WUSNs) consist of sensors that are buried in and communicate through soil. The channel quality of WUSNs is strongly impacted by environmental parameters such soil moisture. Thus, the communication range of the nodes and the network connectivity vary over time. To address the challenges in underground communication, above ground nodes are deployed to maintain connectivity...
Wireless Underground Sensor Networks (WUSNs) are an emerging type of wireless sensor networks (WSNs), where sensor nodes are located under the ground and communicate through soil. The major challenge in the development of efficient communication protocols for WUSNs is the characterization of the underground channel. So far, none of the existing models fully capture all the components of electromagnetic...
Since the emergence of the Internet and the World Wide Web, how to effectively deal with dissemination of crisis information in the public sector has become an urgent and practical problems for government practitioners and other participants. Based on the System Dynamics approach, this study developed the concept model, the logical model and the system dynamics model to describe the public crisis...
In Wireless multimedia sensor networks (WMSNs), two graphs, communication network graph and vision graph, can be established. The camera nodes connected in the vision graph share overlapped field of views (FOVs) and they depend on the densely deployed relay nodes in the communication network graph to communicate with each other. Given a uniformly deployed camera sensor network with relay nodes, the...
Focusing on whether ldquoThrough train of Hong Kong stockrdquo has a significant impact on return and volatility spillover relationship between Hong Kong, Shanghai and Shenzhen stock market, this paper applies the VAR and Multiple GARCH model to the research based on the three stock markets data. The evidence shows that no return spillover effect exits between Hong Kong stock market and Shanghai or...
Split-share structure reform has been a focus since its implementation. It is of great significance in theory and practice to solve whether the circulation initiatives of 2/3 of the non-outstanding shares for listing companies are promoting the development of capital markets validity. By sampling A-share listed before December 31, 1996 in Shanghai stock market, this paper analyzes the simulation of...
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