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Coal fire catastrophes in coal field usually lead to subsidence, collapse, landslide, crack of mining land surface, destroy coal resources and threat local environment, residents health et al. Wuda coal field in Inner Mongolia is one of the largest coal fires area worldwide, which has been researched most extensively. Since August 2010, a fire-fighting project in Wuda coal mining was performed, which...
Air pollution has become one of the most pressing environmental issues in many countries, including China. Finegrained PM2:5 particulate data can prevent people from long time exposure and advance scientific research. However, existing monitoring systems with PM2:5 stationary sensors are expensive, which can only provide pollution data at sparse locations. In this paper we demonstrate for the first...
According to the characteristics of vegetable greenhouse, based on S-MAC protocol, this paper proposed a L-MAC protocol of low power loss. A dynamic duty cycle adjustment mechanism is designed in the protocol, through the network traffic prediction to dynamically adjust the duty cycle to accommodate changes in network traffic. Finally, by the simulation analysis, the validity of the agreement is to...
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