TY CONF TI A MATHEMATICAL MODEL FOR SOLVING THE OPTIMIZATION PROBLEM OF CALCULATING THE TEF IN CONTAINER TRAINS KW TEU KW automated system ETRAN KW container train KW container KW cargo transportation JO INTERNATIONAL SCIENTIFIC AND PRACTICAL CONFERENCE "MANAGEMENT OF OPERATIONAL WORK IN TRANSPORT" (UERT-2022) AU Sheverdova, M.V. PY 2022 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"