Table 2.

Expression of error evaluation indexes.

Error Index	Formula	Analysis
SCC	${\left\{\frac{{\displaystyle \sum _{i=1}^n\left[F_{sim}\left(i\right)\cdot F_{\exp }\left(i\right)\right]}}{\sqrt{{\displaystyle \sum _{i=1}^n{F}_{sim}{\left(i\right)}^2}}\cdot \sqrt{{\displaystyle \sum _{i=1}^n{F}_{\exp }{\left(i\right)}^2}}}\right\}}^2$	Larger is better
MAPE	$\left(\frac{100}{n}\right)\cdot {\displaystyle \sum _{i=1}^n\left|\frac{F_{sim}\left(i\right)-F_{\exp }\left(i\right)}{F_{\exp }\left(i\right)}\right|}$	Smaller is better
MSE	$\frac{1}{n}\cdot {{\displaystyle \sum _{i=1}^n\left|F_{sim}\left(i\right)-F_{\exp }\left(i\right)\right|}}^2$	Smaller is better