Research on the Forecast of the Combined GRU Model Based on the Optimized Bat Algorithm in the Bank Transaction Volume

Table 1

Reference function.

Function	Name	Search range	Minimum value	Characteristics
f1	Ackley	[−32, 32]	0	Multimodal
f2	Griewank	[−600, 600]	0	Multimodal
f3	Rastrigin	[−5.12, 5.12]	0	Multimodal
f4	Sphere	[−100, 100]	0	Unimodal
f5	Schwefel	[−10, 10]	0	Unimodal
f6	Shifted Rastrigin	[−5, 5]	−330	Multimodal
f7	Shifted Rosenbrock	[−100, 100]	390	Multimodal
f8	Shifted Schwefel	[−100, 100]	−450	Unimodal
f9	Shifted Sphere	[−100, 100]	−450	Unimodal