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Artificial Intelligence and Soft Computing: Behavioral ... - Arteimi.info

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1.0<br />

0.6<br />

Young<br />

Old<br />

0.2 Very-old<br />

10 30 50 70 90 110<br />

AGE →<br />

Fig. 9.11: Membership distribution for subsets of AGE.<br />

9.4.2 Fuzzy Relations<br />

For modeling a physical system, whose variations of output parameters with<br />

input parameters are known, one can use fuzzy relations. To illustrate this<br />

point, let us consider a relational system that relates Fast-Runners with Young<br />

by the following production rule PR1.<br />

PR1: IF X-is Young<br />

THEN X-is-a Fast-Runner.<br />

Suppose the membership distribution of subset Young is given in the<br />

following form:<br />

Young = {10 / 0.1, 20 / 0.6, 30 / 0.8, 40 / 0.6},<br />

where a / b in subset Young represents Age / membership value of having that<br />

age. Further, let us consider the subset Fast-Runner, which can be stated as:<br />

Fast-Runner = {5 / 0.1, 8 / 0.2, 10 / 0.4, 12 / 0.9}

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