Improved Quantum-Inspired Evolutionary Algorithm for Engineering Design Optimization

Table 5

Optimal design for pressure vessel.

Quantity	Best solutions					Remarks
	Sandgren [2]	Fu et al. [7]	Shih and Lai [60]	Rao and Xiong [12]	LSQEA
𝑥1	1.125	1.125	1.125	1.1875	1.125	Discrete
𝑥2	0.625	0.625	0.625	0.625	0.625	Discrete
𝑥3	48.97	48.3807	47.448	61.4483	58.27	Continuous
𝑥4	106.72	111.7449	119.98	27.4037	43.9	Continuous
𝑓(𝑋)	7982.5	8048.619	8160.80	7284.02	7204.914