A Plant Propagation Algorithm for Constrained Engineering Optimisation Problems

Table 8

Optimal solutions for a variation on Himmelblau's function.

Solution vector	GA [38]	HSA [29]	PHS [27]	IPHS [27]	PPA
𝑥1	*^a	78.0	78.0	78.0	78.0
𝑥2	*	33.0	33.0	33.0	33.0
𝑥3	*	29.995	30.0053	29.9953	29.9952
𝑥4	*	45.0	45.0	45.0	45.0
𝑥5	*	36.776	36.7521	36.7756	36.7758
𝑔1(𝑥)	*	*	91.9963	91.9999	92.0
𝑔2(𝑥)	*	*	98.8362	98.8404	98.8405
𝑔3(𝑥)	*	*	20.0	20.0	20.0
𝑓(𝑥)	−30665.500	−30665.500	−30663.845	−30665.533	−30665.540

aNot available.