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

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By applying elementary network theorems, we derive the following<br />

constraints:<br />

V1 = I1*R1<br />

V2 = I2*R2<br />

V = V1<br />

V = V2<br />

I = I1+I2<br />

V1<br />

=<br />

V<br />

=<br />

V2<br />

= *<br />

Fig. 19.2 (a): The constraint network corresponding to fig. 19.1.<br />

These constraints together take the following form:<br />

C = (V1=I1*R1) ∧ (V2 = I2*R2) ∧ (V=V1) ∧ (V=V2) ∧ (I=I1+I2),<br />

which can be represented by a constraint network (fig.19.2(a)). The<br />

propagation of constraints in the network are illustrated in fig.19.2(b) <strong>and</strong> (c)<br />

for computation of I.<br />

Now, given V=10V, R1=R2=10Ω, we can evaluate I by the following<br />

steps using the constraint network.<br />

=<br />

I2<br />

R2<br />

I1<br />

R1<br />

+<br />

=<br />

I

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