Evolvable Systems: From Biology to Hardware: 5th by Christof Teuscher, Mathieu S. Capcarrere (auth.), AAndy M.

By Christof Teuscher, Mathieu S. Capcarrere (auth.), AAndy M. Tyrrell, Pauline C. Haddow, Jim Torresen (eds.)

The suggestion of evolving machines, whose origins could be traced to the cybernetics movementofthe1940sand1950s,hasrecentlyresurgedintheformofthenascent ?eld of bio-inspired platforms and evolvable undefined. The inaugural workshop, in the direction of Evolvable undefined, came about in Lausanne in October 1995, by means of the 1st foreign convention on Evolvable structures: From Biology to (ICES), held in Tsukuba, Japan in October 1996. the second one ICES convention was once held in Lausanne in September 1998, with the 3rd and fourth being held in Edinburgh, April 2000 and Tokyo, October 2001 respectively. This has turn into the major convention within the ?eld of evolvable structures and the 2003 convention promised to be a minimum of nearly as good as, if no longer greater than, the 4 that preceeded it. The ?fth foreign convention was once outfitted at the good fortune of its predec- sors, aiming at providing the most recent advancements within the ?eld. moreover, it introduced jointly researchers who use biologically encouraged techniques to imp- ment genuine structures in arti?cial intelligence, arti?cial existence, robotics, VLSI layout and comparable domain names. we'd say that this ?fth convention on from the former 4 in that it consisted of a couple of top of the range fascinating thought-provoking papers.

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Additional info for Evolvable Systems: From Biology to Hardware: 5th International Conference, ICES 2003 Trondheim, Norway, March 17–20, 2003 Proceedings

Example text

Figures 4 -7 show how the success rate and the function evaluations are changed when a circuit representation is modified. The results have been obtained under assumption that the amount of iterations is less than the genotype length. 02. 04. The selection intensity I depends on a truncation threshold of τ [17]. The most obvious fact is that the success rate is generally enhanced where the element-list circuit representation is used. The branch-list circuit description is less efficient. It is remarkable that the same number of function evaluations is required for two circuit representations approximately.

1 Circuit Behaviour without Faults The first step in the computation of the fault free behaviour is to convert the genotype into a circuit. The output string can then be calculated by simulating the circuit. By comparing the output string with the correct string, we can get an ‘error string’ which is ‘1’ wherever the two differ, and ‘0’ otherwise. The number of ‘1’s in the fault string gives a straightforward measure of the quality of the circuit. 2 Thorsten Schnier and Xin Yao Circuit Behaviour with Faults The behaviour of a circuit with faults depends on the nature of the fault or faults.

6. A representation of the multiprocessor system. Cells 0, 4 & 5 and Cells 1, 3 & 11 perform different processing tasks. Cells 2 and 9 have been killed off to demonstrate fault tolerance. The remaining cells are redundant. The main system input (Stimulator) and output (Drain) are also shown. to biorhythms [9], can be observed. Figure 7 shows the activity levels of cell 4 (see Figure 6). The stimulation and inhibition components that define the cells activity can be seen. Each rise and fall in activity is regulated by the initial stimulus of input data.

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