Theoretical Studies on the Longitudinal Inhomogeneity of Track Stiffness and a Track Status Estimation Method

<div>The entropy of PDF of wheel-rail vertical force due to variation of rail pad vertical stiffness. (a) Entropic value for specific samples; (b) the statistical mean value of entropy under different total samples.</div>

Advances in Civil Engineering

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Figure 7

Figure 7: Theoretical Studies on the Longitudinal Inhomogeneity of Track Stiffness and a Track Status Estimation Method 