TY JOUR TI THE RISK ASSESSMENT MODEL IN FUZZY ENVIRONMENT USING LOGICAL INFERENCE ON FUZZY SETS OF THE FIRST ORDER KW risk assessment KW fuzzy set theory KW fuzzy sets of the first order KW logical inference on fuzzy sets JO Scientific and analytical journal «Vestnik Saint-Petersburg university of State fire service of EMERCOM of Russia» AU Gvozdik, M.I. AU Abdulaliev, F.A. AU Shilov, A.G. PY 2017 IS 2017 PB Saint-Petersburg University of State Fire Service of Emercom of Russia