Abstract
The knowledge of an object under observation will have no concrete meaning unless we can work out a logical model the similarities of which are known in relation to the analysed structures. The logical model, when dealing with complex structures, is drawn out by similarity starting from an analogical model worked out in relating local dimensions in the object to physical dimensions of a different nature which restrict the number of variables and can be arranged and modified as required.Any operating similarity and behaviour comparisons come actually down to an apparent functional analogy. The difference between the thin structure of the natural and artificial systems makes it illusive to hope that a strict isomorphism between these two fields may thus be sorted out. However, the fact of achieving analogical models widens our knowledge and shows new possibilities to the human creative mind