TY CONF TI SIMULATION MODELING OF PRIMARY OIL TREATMENT FACILITIES KW mathematical modeling KW simulation model KW difference equations KW hierarchy analysis method KW oil heating furnace JO SCIENCE AND INNOVATION 2021: DEVELOPMENT DIRECTIONS AND PRIORITIES AU Kirushin, O.V. AU Krasnov, A.N. AU Prakhova, M.Y. PY 2025 PB AUS PUBLISHERS