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

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which, however, is not presented here to maintain continuity of the present<br />

context.<br />

The microscopic view of the three common vesicular aggregates, studied<br />

by Lahiri [3], is presented below. It demonstrates that the 2-D spatial<br />

periodicity<br />

DMPC = Dimyristoyl phosphatidylcholine<br />

Fig. 13.8: Digitized images for the vesicular clusters made by (a) DMPC,<br />

(b) DMPC in presence of spectrin <strong>and</strong> (c) a mixed lipid system<br />

made by DMPC <strong>and</strong> cholesterol, obtained from a Phase Contrast<br />

Microscope.<br />

(structural repetitiveness) of the texture of these vesicular clusters has<br />

considerable differences in microscopic observation, <strong>and</strong> as a consequence<br />

their classification from 2-D features is feasible. A non-linear 2-D<br />

classification of these three vesicular aggregates has been presented in fig.<br />

13.9. It is observed from the figure that the boundaries of the classes (b) <strong>and</strong><br />

(c) have a small separation, while that of (a) & (b), <strong>and</strong> (a) & (c) have a large<br />

spatial gap. The results also intuitively follow from the microscopic view.<br />

Not only in Biology, but in almost every branch of Science, pattern<br />

classification is of immense importance. In Psychology, for example, pattern<br />

classification is used to classify people of different mental diseases for<br />

treatment by a common therapy. In criminology the fingerprint of a suspect is<br />

classified into typical classes prior to matching it with known fingerprint<br />

databases of that class. Whatever be the problem, the main task in pattern<br />

classification is to extract the features, for which no automated methods is<br />

known to date.<br />

13.4 Re<strong>info</strong>rcement Learning<br />

In re<strong>info</strong>rcement learning, the learner adapts its parameters by determining the<br />

status (reward / punishment) of the feedback signal from its environment. The

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