Mixture Ratio Design Optimization of Coal Gangue-Based Geopolymer Concrete Based on Modified Gravitational Search Algorithm

Table 2

Comparison of optimized results from standard testing functions.

Functions	Statistical data	TGSA	CGSA (L)	CGSA (C)
	Mean	3.301E − 16	2.452E − 19	2.452E − 21
	Optimal value	2.026E − 16	1.103E − 19	1.103E − 21
	Standard deviation	1.411E − 16	2.877E − 19	2.877E − 21
	Mean	26.433	19.751	12.342
	Optimal value	25.302	8.459	5.221
	Standard deviation	16.453	1.246	0.678
	Mean	4.427	2.235	1.055
	Optimal value	3.012	0.043	0.024
	Standard deviation	1.254	0.848	0.457
	Mean	17.842	10.366	8.822
	Optimal value	13.474	2.478	1.175
	Standard deviation	3.675	1.551	1.046
	Mean	5.765	0.137	0.0975
	Optimal value	4.038	0.0839	0.0622
	Standard deviation	2.654	0.257	0.164