The computational resource needs of artificial intelligence devices have been increasing by the more complicated tools and the stricter requirements. Only the most efficient algorithms-based artificial intelligence devices corresponds to practical-applicability. We develop mathematical modelling methodologies, which are based on the structural examination of engineering systems. The methodology increase the efficiency and effectivity of artificial intelligence tools. We consider important the direct engineering or economic applicability of the theoretical results. Our main research areas are the controllability of systems, energy efficiency of systems and sustainability of systems.
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