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Evolution and Optimum Seeking

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Numerical Comparison of Strategies 191<br />

Table 6.4 (continued)<br />

EVOL{(1+1) evolution strategy (average values)<br />

Number of variables Number of mutations Computation time<br />

in seconds<br />

3 85 0.33<br />

6 213 1.18<br />

10 728 6.15<br />

20 2874 44.4<br />

30 5866 136<br />

60 24089 963<br />

100 69852 4690<br />

150 152348 15200<br />

GRUP{(10 , 100) evolution strategy (average values)<br />

Number of variables Number of generations Computation time<br />

in seconds<br />

3 5 2.02<br />

6 14 9.36<br />

10 53 49.4<br />

20 183 326<br />

30 381 955<br />

50 1083 4400<br />

80 2977 18600<br />

100 4464 35100<br />

REKO{(10 , 100) evolution strategy with recombination (average<br />

values)<br />

Number of variables Number of generations Computation time<br />

in seconds<br />

3 6 2.44<br />

6 15 18.9<br />

10 42 76.2<br />

20 162 546<br />

30 1322 6920<br />

40 9206 61900<br />

Figures 6.2 to 6.13 translate the numerical data into vivid graphics. The abbreviations<br />

used here are:<br />

OFC st<strong>and</strong>s for objective function calls<br />

ORT st<strong>and</strong>s for orthogonalizations<br />

The parameters 1.1 <strong>and</strong> 1.2 refer to Problems 1.1 <strong>and</strong> 1.2 as mentioned above.

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