TY JOUR TI ABOUT ONE APPROACH TO ASSESSING THE EFFECTIVENESS OF MATHEMATICAL MODELS KW mathematical model KW the criterion of efficiency KW private performance indicators KW efficiency KW quality KW reliability and production solutions KW weighting factors KW controls KW evaluation of the effectiveness of the model JO Problems of risk management in the technosphere AU Maslakov, M.D. AU Bagretsov, S.A. AU Chernykh, A.K. PY 2013 IS 2013 PB Saint-Petersburg University of State Fire Service of Emercom of Russia