TY JOUR TI THE QUESTIONS OF MATHEMATICAL MODELING IN TASKS OF SAFETY OF COMPLEX TECHNICAL SYSTEMS KW complex technical system KW information systems for monitoring KW mathematical modeling KW principles of modeling JO NATURAL AND MAN-MADE RISKS (PHYSICO-MATHEMATICAL AND APPLIED ASPECTS) AU Kalinina, E.S. PY 2017 IS PB Saint-Petersburg University of State Fire Service of Emercom of Russia