Journal of Electrical Systems and Information Technology

Table 4 Percentage errors associated with forecasts by the various models, for energy data for a desktop computer

From: Improvement of Grey System Model using Particle Swarm Optimization

	PSO-GM(1,1)	GM(1,1)	Method in [18]	Method in [19]
	– 0.0011	4.2443	– 0.0011	2.3192
	– 0.0003	2.7056	– 0.0004	1.5522
	0.0025	1.1597	0.0024	0.7792
	– 0.0033	– 0.3992	– 0.0033	0
MAPE	0.0018	2.1272	0.0018	1.1626

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