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Without the applicable methods of forecasting the outbreak of debris flows in a wide area as well as long time, wireless sensor networks (WSN) of monitoring debris flow are essential for protecting safety and property of human. In nowadays, a common and key consideration of the network would be the energy efficiency, since both of the soil moisture (SM) sensor and the radio are power-hungry, meanwhile,...
For the applications of Wireless Sensor Networks (WSN), the lifetime of WSN has been a very important and hot research topic. In practical applications, data gathering is a common but critical operation in many applications of WSNs, especially in environment monitoring system. In some harsh environment, deploying wireless sensor networks is a difficult and expensive work. Therefore, energy saving...
In this paper, we propose a novel application problem in wireless sensor networks. It is the real-time data forwarding for mobile target tracking problem. It mainly focuses on routing the sensing data from multiple sources to multiple sinks with the consideration both of energy conservation and latency limitation. This problem is proved to be NP-complete. We propose three different heuristic methods...
How much and what kind of energy should the civilization consume, if one aims at preserving global stability of the environment and climate? Here we quantify and compare the major types of energy fluxes in the biosphere and civilization.It is shown that the environmental impact of the civilization consists, in terms of energy, of two major components: the power of direct energy consumption (around...
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