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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