Our aim is to present the algebra of concepts in two formal languages. First, after introducing a primary relation between concepts, which is subsumption, we shall specify in a language that uses quantifiers, the Boolean algebra of general concepts. Next, we shall note down the same algebra in simplified non-quantifying language, in order to use it as basis for two specific implementations, i.e. to create the Boolean algebras of deontic concepts and axiological concepts.
The primary objective of this article is to find a new, more effective method of diagnosis of Crohn's disease. Having
created the database on this disease we wanted to find the most suitable classification models. We used the algorithms
with their implementations stored in R environment. Having carried out the investigations we have reached results
interesting for clinical practice.
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