“…The downward train y j (18033) is towed by the SS 4B DC locomotive. According to the collected data, ∆t 1 = t i+1,k − τ j,k+1 = 77 s, ∆t 2 = t i,k+1 − t i+1,k = 306 s, and ∆t 3 = τ j,k − t i,k+1 = 509 s; combining Equations (20) and (21), P i,k , P i+1,k , and P i,k are obtained.…”