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. 2023 Apr 18;95:106408. doi: 10.1016/j.ultsonch.2023.106408

Fig. 4.

Fig. 4

The performance of the GA-BP and GA-ACO-BP model. A: fitness function plot of GA-BP neural network. B: GA-BP neural network MSE for different data sets. C: MAE of the GA-ACO-BP model with different generation. D: GA-ACO-BP neural network MSE for different data sets.