COVID-19 Propagation Prediction Model Using Improved Grey Wolf Optimization Algorithms in Combination with XGBoost and Bagging-Integrated Learning

Table 4

Optimization search results of four algorithms for standard test functions.

		DE	PSO	GWO	COLGWO
	Average value	0.00716952881962376	4.58E − 07	1.74E − 27	0
	Standard deviation	0.00892434320906037	9.67E − 07	2.64E − 27	0
	Average value	2459.11866144729 4	483153344	4.98E − 22	0
	Standard deviation	2438.72294203683	15.26685017	9.28E − 22	0
	Average value	0.254499657312407	3.41E − 05	9.27E − 24	0
	Standard deviation	0.681425676307518	7.64E − 05	1.25E − 23	0
	Average value	0.00440696961956876	1.15E − 07	6.60E − 28	0
	Standard deviation	0.00489054323509337	1.96E − 07	8.25E − 28	0
	Average value	211.342901198991	1129.880979	3.216822796	0
	Standard deviation	21.4117756082338	421.9713817	4.907623241	0
	Average value	0.00407161054793563	0.033167593	0.003456494	0
	Standard deviation	0.00636993045210643	0.033820478	0.007518388	0
	Average value	34.9908955808477	0.034919137	2.485701732	0
	Standard deviation	22.3283305576275	0.035951133	12.08406381	0
	Average value	20.9805740011391	20.47832934	9.932619146	4.44E − 16
	Standard deviation	0.106398593367519	0.618180325	10.41113601	0