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Optimization of mine ventilation network feature graph

Fig 19

The hierarchy of Q-H graph.

(a) Total Q-H graph, (b)General view, (c) s(v₁,v₈), (d) p(v₂,v₇), (e) s(v₂,v₇) left, (f) s(v₂,v₇) right, (g) d(v₉,v₁₃), (h) p(v₁₀,v₁₂), (i) d(v₂,v₅), (j) p(v₅,v₆).

doi: https://doi.org/10.1371/journal.pone.0242011.g019