TY JOUR TI ON THE POSSIBLE SCHEMES OF NATURAL-VIRTUAL AND VIRTUAL-NATURAL LABORATORY EXPERIMENTS IN THE EDUCATIONAL PROCESS KW natural laboratory experiments KW virtual experiments KW natural-virtual laboratory experiment KW virtual-natural laboratory experiment KW parallel scheme KW consistent scheme JO NATURAL AND MAN-MADE RISKS (PHYSICO-MATHEMATICAL AND APPLIED ASPECTS) AU Kuzmin, A.A. AU Romanov, N.N. PY 2016 IS 2016 PB Saint-Petersburg University of State Fire Service of Emercom of Russia