Table 2 GRU parameter optimum after iterative optimization of two algorithms.

From: Mine water inflow prediction model based on variational mode decomposition and gated recurrent units optimized by improved chimp optimization algorithm

Parameter name

iCHOA

CHOA

Initial learnrate

7.5e−3

4.1e−3

L2 regularization

2.75e−4

1.21e−4

Num of units

33

30

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