The Optimisation for Local Coupled Extreme Learning Machine Using Differential Evolution

Table 2

Function approximation results of ELM, OSFuzzyELM, LC-ELM, and ELC-ELM.

Algorithm	Lowest testing	Hidden nodes	Avg. training		Avg. testing
	RMSE		RMSE	SD	RMSE	SD
ELM	0.0221	110	0.1303	0.0054	0.0607	0.0217
OSFuzzyELM	0.0371	140	0.1302	0.0068	0.0764	0.0289
LC-ELM	0.0219	90	0.1295	0.0055	0.0552	0.0173
ELC-ELM	0.0203	60	0.1167	0.0015	0.0403	0.0277