Thickness Characterization of Steel Plate Coating Materials with Terahertz Time-Domain Reflection Spectroscopy Based on BP Neural Network.

Drawing from the network training results of 2–12 different neurons, Figure 9 summarizes the root mean square error for varying neuron nodes, which presents a decreasing trend, indicating that as the number of neurons increases, the information exchange between neural networks intensifies, boosting the computational accuracy of those networks.

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