%0 Journal Article %T PRINCIPLES OF FORMAL CLASSIFICATION THEORY OF TECHNICAL SYSTEMS: CASE OF ENERGY FACILITIES %A Fedorova, N.V. %K technical systems, classification, formal theory, energy objects and systems %J Vestnik of Astrakhan State Technical University. Series: Management, computer science and informatics %D 2021 %N %P 12 %I Astrakhan State Technical University