TY JOUR TI Construction of an Optimal Motion Model for a High-Speed Electric Train Based on Precomputed Transitions and Dynamic Programming KW high-speed electric train KW traffic schedule KW automatic train control system KW dynamic programming KW Bellman relation KW speed limit KW motion optimization JO Bulletin of scientific research results AU Valinsky, O.S. AU Evstaf'ev, A.M. AU Sychugov, A.N. AU Suhanov, E.V. PY 2026 IS 2026 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"