TY CONF TI INTEGRAL CHARACTERISTICS OF VECTOR FIELDS KW vector fields KW closed surface KW elementary flow KW closed trajectory KW total force JO MODELING INFORMATION SYSTEMS AND TECHNOLOGIES – 2025 AU Skvorcova, E.I. AU Yagodkin, A.S. AU Shapkin, V.S. PY 2025 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov