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A traffic data collection and analysis method based on wireless sensor network

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Figure

Fig. 1 Traffic flow collecting system architecture based WSN. The data collection node uses RFM69HCW wireless module and magnetometersensor FXOS8700CQ to build the hardware part
Fig. 2 Sine signal and the surrogate data under different noiseintensity. Add noise of different intensities (corresponding to thevalue of parameter ρ) to a sine signal using the PPS algorithm
Fig. 3 Delayed mutual information sequence of two signals. Thisfigure shows that the delayed mutual information can express thecomplexity of the signal
Fig. 4 The MD mean value of three periodic signals’ surrogate data.The curves corresponding to the periodic signals remain stable atfirst, and when the noise exceeds a certain threshold, these curvesbegin to decline
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