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Coverage and connectivity are two important performance metrics in wireless sensor networks. In this paper, we study the sensor placement problem to achieve both coverage and connectivity. Instead of using the simplistic disk coverage model, we use our recently proposed confident information coverage model as the sensor coverage model. The grid approach is(More)
This paper introduces a new kind of mine personnel localization monitoring system. It is a kind of wireless sensor network based on ZigBee wireless communication technology. The system can fast achieve the miners' real-time and accurate localization information about where the miners are underground mine tunnels and solve the positioning shortcomings of the(More)
An equivalent analog circuit is designed to mimic the coupled ears of the fly Ormia ochracea for sound source localization. This coupled circuit receives two signals with tiny phase difference from a space closed two-microphone array, and produces two signals with obvious intensity difference. The response sensitivity can be adjusted through the coupled(More)
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