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Evolution and Optimum Seeking

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356 Appendix A<br />

Problem 2.44<br />

As Problem 2.26, but with additional constraints:<br />

Minimum:<br />

G 1(x) =;x + 300 0 G 2(x) =x + 300 0<br />

x = ;300 F (x ) ';299:7 G 2 active<br />

Besides this global minimum there are ve more local minima within the feasible region.<br />

Start:<br />

x (0) =0 F (x (0) )=0<br />

The global minimum could only be located by multimembered evolution. All the other<br />

search strategies converged to the local minimum nearest to the starting point.<br />

Problem 2.45 of Smith <strong>and</strong> Rudd (after Leon, 1966a)<br />

Objective function:<br />

Constraints:<br />

Gj =<br />

F (x) =<br />

8<br />

><<br />

>:<br />

nX<br />

i=1<br />

x i<br />

i e;x i for n =5<br />

xj 0 for j = 1(1)n<br />

2 ; xj;n 0 for j = n + 1(1)2 n<br />

Figure A.27: Diagram F (x) for Problem 2.44

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