Research Article

An Evolutionary Algorithm with Clustering-Based Assisted Selection Strategy for Multimodal Multiobjective Optimization

Table 4

Results obtained by four other MMOEAs and MMOEA-CAS on IGDF.

BenchmarkOmnioptimizerDN-NSGA-IIMO-Ring-PSO-SCDTriMOEA-TA&RMMOEA-CAS

SYM-PART simple1.216e02 (1.72e03)+1.230e−02 (1.78e−03)+4.042e−02 (5.50e−03)−3.414e−02 (4.99e−03)−2.628e−02 (3.07e−03)
SYM-PART rotated1.252e02 (1.70e03)+1.539e−02 (2.12e−03)+4.604e−02 (4.32e−03)−2.843e−02 (3.88e−03)+3.201e−02 (5.92e−03)
Omnitest6.776e03 (2.47e04)+7.911e−03 (5.10e−04)+4.232e−02 (5.35e−03)−1.841e−02 (4.18e−03)+2.953e−02 (2.03e−03)
MMF13.788e−03 (5.27e−04)+4.451e−03 (4.07e−04)+3.707e03 (1.58e04)+4.926e−03 (9.72e−04)∼4.762e−03 (5.42e−04)
MMF1_z3.231e03 (4.30e04)+3.649e−03 (4.91e−04)+3.603e−03 (1.57e−04)+4.418e−03 (9.38e−04)+5.427e−03 (1.06e−03)
MMF1_e1.701e−02 (9.98e−03)+2.171e−02 (1.52e−02)+1.229e−02 (1.50e−03)+6.981e03 (1.42e03)+1.191e−01 (5.32e−02)
MMF21.801e02 (9.68e03)3.691e−02 (3.43e−02)∼1.994e−02 (4.34e−03)∼2.521e−02 (8.18e−03)−1.839e−02 (3.99e−03)
MMF32.203e−02 (2.40e−02)∼2.320e−02 (1.42e−02)∼1.614e02 (3.22e03)5.876e−02 (7.78e−02)−1.990e−02 (9.70e−03)
MMF42.818e−03 (2.63e−04)−3.209e−03 (1.81e−04)−3.652e−03 (3.93e−04)−3.445e−02 (6.70e−02)−2.694e03 (4.49e04)
MMF53.471e03 (6.47e04)+3.793e−03 (3.10e−04)+3.748e−03 (1.94e−04)+4.220e−03 (6.03e−04)∼4.284e−03 (5.54e−04)
MMF63.154e03 (3.20e04)+3.747e−03 (2.97e−04)+3.538e−03 (1.34e−04)+4.602e−03 (2.06e−03)+7.700e−03 (2.43e−03)
MMF73.162e−03 (2.96e−04)−3.957e−03 (4.17e−04)−3.830e−03 (3.43e−04)−4.273e−03 (1.25e−03)−2.937e03 (6.51e04)
MMF83.145e03 (1.88e04)+3.983e−03 (5.03e−04)+4.838e−03 (2.83e−04)∼5.667e−03 (7.00e−03)−5.583e−03 (1.69e−03)
MMF91.271e02 (1.28e03)1.441e−02 (1.84e−03)−1.562e−02 (1.42e−03)−6.975e−02 (4.17e−03)−1.332e−02 (1.42e−03)
MMF101.822e−01 (4.17e−02)−1.938e−01 (4.11e−02)−1.297e−01 (1.51e−02)−2.285e−01 (5.05e−03)−3.839e02 (3.63e02)
MMF119.565e−02 (9.39e−04)−9.823e−02 (2.07e−03)−8.508e−02 (6.16e−03)−1.633e−01 (7.27e−03)−2.827e02 (3.10e03)
MMF128.611e−02 (8.13e−03)−8.404e−02 (2.68e−03)−6.431e−02 (1.27e−02)−8.601e−02 (1.47e−03)−5.118e03 (3.54e04)
MMF131.472e−01 (2.08e−03)−1.507e−01 (4.40e−03)−9.329e−02 (1.73e−02)−2.431e−01 (6.87e−03)−4.139e02 (9.33e03)
MMF149.765e−02 (3.95e−03)−1.080e−01 (8.20e−03)−8.042e−02 (2.94e−03)−8.616e−02 (1.12e−03)−6.788e02 (1.14e03)
MMF14_a1.049e−01 (4.57e−03)−1.178e−01 (6.69e−03)−7.818e−02 (2.50e−03)−7.878e−02 (1.15e−03)−7.506e02 (1.69e03)
MMF152.010e−01 (7.37e−03)−2.162e−01 (1.14e−02)−1.741e−01 (3.27e−03)−2.067e−01 (7.10e−04)−1.134e01 (1.21e02)
MMF15_a2.074e−01 (8.92e−03)−2.259e−01 (1.05e−02)−1.744e−01 (3.72e−03)−1.936e−01 (3.67e−03)−1.483e01 (3.59e03)
best/all9/220/222/221/2210/22
+/–/∼9/10/39/11/25/14/35/15/2– –

Wilcoxon’s rank-sum test () is used for experimental comparison where +, −, and = represent that the performance of the results obtained by competitors is better, worse, or similar.