An Elite Decision Making Harmony Search Algorithm for Optimization Problem

Table 5

Four HS algorithms for Powell quartic function.

Variables	IHS	GHS	SGHS	EDMHS
𝑥1	−0.0383028653671760	−0.0256621703960072	0.0334641210434073	−0.0232662093056917
𝑥2	0.0038093414837046	0.0023707007810820	−0.0033373644857512	0.0023226342970439
𝑥3	−0.0195750968208506	−0.0199247989791340	0.0159748222727847	−0.0107227792768697
𝑥4	−0.0195676609811871	−0.0199247989791340	0.0160018633328343	−0.0107574107951817
𝑓(𝑥)	0.0000046821615160	0.0000070109937353	0.0000024921236096	0.0000005715572753