Time-Frequency Characteristics of Fluctuating Pressure on the Bottom of the Stilling Basin with Step-Down Floor Based on Hilbert–Huang Transform

<div>Proportions of energy in the high-, medium-, and low-frequency bands of each feature point: (a) <i>Q</i> = 30 m³/s; (b) <i>Q</i> = 50 m³/s; (c) <i>Q</i> = 70 m³/s; (d) <i>Q</i> = 90 m³/s.</div>

Mathematical Problems in Engineering

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Figure 7

Figure 7: Time-Frequency Characteristics of Fluctuating Pressure on the Bottom of the Stilling Basin with Step-Down Floor Based on Hilbert–Huang Transform 

Figure 7 | Time-Frequency Characteristics of Fluctuating Pressure on the Bottom of the Stilling Basin with Step-Down Floor Based on Hilbert–Huang Transform 