Fig 1.
Transformation of network graph and Q-H graph in [14].
(a) Ventilation network graph; (b) Q-H graph.
Fig 2.
Transformation of network graph and Q-H graph.
(a)Ventilation network graph;(b)Q-H graph.
Table 1.
Network parameters.
Fig 3.
Different node output degrees.
Fig 4.
The change of crossover probability and mutation probability of adaptive genetic algorithm.
(a)Variation of crossover probability Pc; (b)Variation of mutation probability Pm.
Fig 5.
General genetic algorithm and improved genetic algorithm fitness value changes.
(a)Fitness value variation for each generation by GA;(b) Fitness value variation for each generation by IAGA.
Fig 6.
Q-H graph optimization flowchart based on IAGA-IPM.
Fig 7.
A stereo ventilation network graph.
Fig 8.
Comparison of drawing effects between IAGA-IPM and IPM.
(a)IAGA-IPM drawing effect;(b)IPM drawing effect.
Fig 9.
Comparison of Q-H graph optimization effect.
Fig 10.
A ventilation network graph with the unidirectional circuits.
Fig 11.
Program chart of determining all paths for the network with unidirectional circuits.
Fig 12.
The conversion of a ventilation network containing single circuit into a network without single circuit.
(a) Network graph containing unidirectional circuits.(b)Network graph after topology transformation.
Table 2.
Parameters of ventilation network with unidirectional circuits.
Fig 13.
Q-H graph containing unidirectional circuits.
Fig 14.
Three-dimensional network graph in [14].
Fig 15.
Comparison between [14] and the drawing effect of this paper.
(a)Drawing effect in [14];(b)Drawing effect of this paper.
Fig 16.
Two common ventilation networks.
(a) ∇ network graph; (b) Y network graph.
Fig 17.
Program chart of automatic simplification.
Fig 18.
Network simplification process.
(a) An example ventilation; (b) Result of network simplification.
Fig 19.
(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).
Fig 20.
(a) Q-H graph of distribution of three areas; (b)Q-H graph of distribution of gas concentration; (c) Q-H graph of distribution of pollution scope.