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A clustering based mate selection for evolutionary optimization

  • * Corresponding author: A. Zhou

    * Corresponding author: A. Zhou 
This work is supported by the National Natural Science Foundation of China under Grant No. 61673180 and 61703382, the Shanghai Clearing House under the project of 'artificial intelligence methods for complex 0-1 financial optimization', and the Open Project of Shanghai Key Laboratory of Trustworthy Computing under Grant No. 07dz22304201507.
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  • The mate selection plays a key role in natural evolution process. Although a variety of mating strategies have been proposed in the community of evolutionary computation, the importance of mate selection has been ignored. In this paper, we propose a clustering based mate selection (CMS) strategy for evolutionary algorithms (EAs). In CMS, the population is partitioned into clusters and only the solutions in the same cluster are chosen for offspring reproduction. Instead of doing a whole new clustering process in each EA generation, the clustering iteration process is combined with the evolution iteration process. The combination of clustering and evolving processes benefits EAs by saving the cost to discover the population structure. To demonstrate this idea, a CMS utilizing the k-means clustering method is proposed and applied to a state-of-the-art EA. The experimental results show that the CMS strategy is promising to improve the performance of the EA.

    Mathematics Subject Classification: 78M32.

    Citation:

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  • Figure 1.  Population partition of a typical run for BCS and CMS strategies with CoDE on (a) F2 and (b) F3

    Figure 2.  The error bars of the results obtained by CMS-CoDE with different combinations of control parameters (K, G) over 30 runs on some test instances

    Table 1.  The mean results of the compared methods over 30 independent runs on 20 test instances of 30 variables with 3000,000 FES

    RND NNS BCS CMS
    F13.21e-08+0.00e+00≈0.00e+00≈0.00e+00
    F23.14e-01+8.17e-04+2.71e-05−5.66e-05
    F31.21e+05−2.13e+05−2.22e+05≈2.64e+05
    F41.08e+01+3.74e+00+1.87e-01−2.72e-01
    F53.90e+02−1.00e+03≈6.85e+02−8.69e+02
    F62.65e+01+7.19e+01+4.55e+01≈3.80e+01
    F74.70e+03+4.70e+03+4.70e+03≈4.70e+03
    F82.09e+01+2.08e+01+2.02e+01−2.03e+01
    F91.67e+01+5.15e-06−4.65e+00−7.31e+00
    F101.63e+02+3.52e+01−4.64e+01+4.11e+01
    F113.37e+01+9.85e+00−1.33e+01≈1.35e+01
    F121.88e+05+1.54e+05+7.16e+04≈7.90e+04
    F138.18e+00+2.65e+00−2.58e+00−2.91e+00
    F141.33e+01+1.21e+01−1.24e+01≈1.23e+01
    F156.40e+02+5.14e+02+4.71e+02≈4.78e+02
    F164.25e+02+3.00e+02−3.10e+02≈3.15e+02
    F174.66e+02+3.03e+02−3.16e+02≈3.19e+02
    F189.26e+02−9.26e+02≈9.24e+02≈9.24e+02
    F199.26e+02≈9.26e+02−9.25e+02≈9.26e+02
    F209.26e+02≈9.24e+02−9.25e+02≈9.25e+02
    +1571
    3106
    2313
     | Show Table
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    Table 2.  The average CPU time (seconds) used by the four algorithms on F1-F20 with 300,000 function evaluations over 30 runs

    RND NNS BCS CMS
    F111.6812.8417.6112.99
    F212.2112.7015.0212.82
    F312.9312.8315.1113.09
    F412.9913.2915.3913.31
    F516.0715.1817.0815.09
    F611.7212.76500.2812.71
    F714.5415.7317.3315.58
    F816.8917.6516.8914.39
    F914.9814.46126.0612.82
    F1015.0613.1413.9813.09
    F1161.2958.7658.6457.58
    F1246.4947.5944.4442.98
    F1313.0613.1514.5313.00
    F1417.0816.4016.3214.39
    F15113.89115.58180.81115.32
    F16119.73116.78171.78116.16
    F17120.10117.87452.28117.31
    F18123.71121.59121.74120.65
    F19149.03152.96152.79147.89
    F20220.64217.06218.65215.53
     | Show Table
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