TY JOUR TI From NDT to Condition Monitoring. Development Trends in Digital Economy KW smart sensors KW self-calibrating KW multicornered test KW cyber-physical systems KW digital twins KW metrological assurance KW standardization JO NDT World AU Syasko, V.A. AU Gogolinskiy, K.V. PY 2020 IS 23 PB LLC SVEN