Improved Permutation Entropy for Measuring Complexity of Time Series under Noisy Condition

Figure 10

Entropy analysis of three types of ship-radiated noise in 5dB condition. (a) Result of IPE. (b) Result of PE. (c) Result of WPE. (d) Result of AAPE. (e) Result of mPE. (f) Result of IAUQ.

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