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Because of the measuring methods for deep soil parameters (temperature and moisture) are offline and the measurement results are not accurate, and meanwhile, the common soil sensors can not be used for the real-time measurement of deep soil in geothermal borehole. In this paper, we design a temperature and moisture sensor and a data processing circuit with the resistance method and DS18B20, and develop...
This paper presents a method of selecting operation frequency point based on adaptive beam forming. It is firstly to reject the directional interference by spatial filtering, then select suitable operation frequency point. The simulation results shows feasibility and effectiveness of this scheme.
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