Figure 2
The train stopping scheme diagram visually represents the stopping patterns of trains at various stations along a route, divided into two main sections. The left section is labeled “Low-grade actual train stopping scheme.” It lists “G 101,” “G 103,” “G 105,” “G 107,” and “G 901” with horizontal lines representing their routes. Each line includes several circular stops. The middle of each line has a small open circle, and each route extends horizontally from left to right. The right section is labeled “Form 20 sets of alternative experimental schemes.” It shows two sections. Each section contains train routes labeled with stations “B J N,” “L F,” “T J N,” “C Z X,” “D Z D,” and “J N X” along the top. Horizontal lines with circular nodes represent different train stopping patterns. Inside both sections, these schemes are divided into two: “Low grade” and “High grade.” High-grade points are placed inside the red box, and low-grade points are placed inside the green box. The top section is labeled “Train stopping alternative set Scheme 1.” High grade at top, arrows pointing from left to right: 3, B J N, J N X. Low grade, starting from top to bottom, and arrows pointing from left to right: 1, B J N, L F, T J N, D Z D, J N X. 1, B J N, L F, T J N, J N X. 1, B J N, L F, C Z X, J N X. 1, B J N, T J N, D Z D, J N X. 3, B J N, C Z X, D Z D, J N X. 3, B J N, C Z X, J N X. 2, B J N, D Z D, J N X. 1, B J N, L F, T J N, C Z X, D Z D, J N X. 2, B J N, D Z D. 2, B J N, T J N, D Z D. 1, B J N, C Z X, D Z D. 1, T J N, C Z X, D Z D, J N X. The bottom section is labeled “Train stopping alternative set Scheme 20.” High grade at top, arrows pointing from left to right: 3, B J N, J N X. Low grade, starting from top to bottom, and arrows pointing from left to right: 2, B J N, L F, C Z X, J N X. 2, B J N, T J N, C Z X, J N X. 2, B J N, T J N, D Z D, J N X. 2, B J N, C Z X, D Z D, J N X. 2, B J N, C Z X, J N X. 2, B J N, D Z D, J N X. 2, B J N, J N X. 1, B J N, C Z X, D Z D. 1, B J N, D Z D. 1, T J N, C Z X, D Z D, J N X. A blue arrow is labeled “Select 19 trains from low-grade actual train,” and an orange arrow is labeled “Select another 19 trains from low-grade actual train.” Four blue arrows are pointing from the left section to the right section's top, labeled “Train stopping alternative set Scheme 1.” Four orange arrows are pointing from the left section to the right section's bottom, labeled “Train stopping alternative set Scheme 20.”Candidate train set generation rules. Source: Author’s own work