TY JOUR TI Methodology for the Application of Variable Standards by the Development of a Train Formation Plan KW Threshold value of car traffic KW fuzzy sets KW unevenness of car traffic KW linguistic model for extracting the train flow JO Proceedings of Petersburg Transport University AU Badeckiy, A.P. AU Medved', O.A. AU Kukushkina, Y.V. PY 2023 IS 20 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"