TY JOUR TI Mathematical models of reliability of railway automation and telemechanics systems KW systems of automation and telemechanics on railways KW reliability KW graph model KW system state KW state transitions KW Kolmogorovs differential equations KW stochastic matrix of transition probabilities KW the probability of stay of system in a certain state JO Transport automation research AU Shamanov, V.. PY 2017 IS 3 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"