Table 5: Optimal design for pressure vessel.

QuantityBest solutions Remarks
Sandgren [2]Fu et al. [7] Shih and Lai [60]Rao and Xiong [12]LSQEA

1.1251.1251.1251.18751.125Discrete
0.6250.6250.6250.6250.625Discrete
48.9748.380747.44861.448358.27Continuous
106.72111.7449119.9827.403743.9Continuous
7982.58048.6198160.807284.027204.914