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A new matrix-based mathematical model for determining unidirectional circuits in a ventilation network 被引量:2
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作者 贾进章 《Journal of Coal Science & Engineering(China)》 2008年第2期260-262,共3页
The occurrence of local circulating ventilation can be caused by many factors, such as the airflow reversion during mine fire,the improper arrangement of local fan or underground fan station and the man-made error inp... The occurrence of local circulating ventilation can be caused by many factors, such as the airflow reversion during mine fire,the improper arrangement of local fan or underground fan station and the man-made error input of raw data before network solving. Once circulating ventilations occur,the corresponding branches in the ventilation network corresponding to the relevant airways in ventilation system form circuits,and all the direc- tions of the branches in the circuits are identical,which is the unidirectional problem in ventilation network.Based on the properties of node adjacent matrix,a serial of mathe- matical computation to node adjacent matrix were performed,and a mathematical model for determining unidirectional circuits based on node adjacent matrix was put forward. 展开更多
关键词 fluid network unidirectional circuit adjacent matrix
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Study on unidirectional circuit problem in multi-fan-station ventilation type of Jinchuan No.2 mine 被引量:1
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作者 刘剑 李艳昌 赵千里 《Journal of Coal Science & Engineering(China)》 2008年第2期257-259,共3页
The calculating methods for path number and path matrix of ventilation net- works without unidirectional circuits were introduced,and the inapplicability problem of the matrix algorithm to determine paths in a ventila... The calculating methods for path number and path matrix of ventilation net- works without unidirectional circuits were introduced,and the inapplicability problem of the matrix algorithm to determine paths in a ventilation network with unidirectional circuit was brought forward,and a depth-first search method based algorithm to determine path ma- trix by means of modifying search strategies was discussed.The method is suitable for ventilation networks with unidirectional circuits and ventilation networks without unidirec- tional circuits,moreover the complexity is less than the complexities of matrix based algo- rithms.A series of methods and means to avoid and to reduce the negative effects of un- idirectional circuits such as the optimum of the positions of fan stations,the increase or de-crease of fan station numbers,the optimum regulation of network and the analysis of diagonal structures were put forward. 展开更多
关键词 ventilation network PATH unidirectional circuit multi-fan-station ventilation circulating airflow
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