Through numerical simulation, the characteristics of goaf flow field and gas transportation under J-shape and U-shape ventilation systems were analyzed.

通过数值模拟，对比分析了J型通风和u型通风条件下的采空区流场及瓦斯运移特征。

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Xu Xiaofeng, Sun Zhaobo. 2003. Dynamic study on influence of gravity wave induced by unbalanced flow on Meiyu front heavy rain [J]. Acta Meteor Sinica, 61 (6) : 655-664.

许小峰，孙照勃。2003。非地转平衡流激发的重力惯性波对梅雨锋暴雨影响的动力学研究[J]。气象学报，61 (6)：655 - 664。

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We define a new set of distance metrics, which measure the average length of particles flow from i to j.

在这种网络上，我们定义了一组流距离，即流子沿连边流动从i到j经历的平均路径长度。

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"It comes in line with what's been kind of a patchy data flow over the last two weeks or so, " said Michael Hood, global market strategist at J.

WSJ: Stocks Falter