And Darcy flow production equation with gas-bearing volume may reflect the characteristics of methane migration in coal measure strata more really.

把含气量引入达西流产量公式也许能更真实地反映甲烷气体在煤储层中流动产出的特征。

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AIM: to measure the flow volume of pulmonary arteries by using phase contrast magnetic resonance imaging (MRI) and to investigate the values of phase contrast MRI in assessing pulmonary perfusion.

目的：采用相位对比法磁共振成像(MRI)测量肺动脉血流量，探讨并评价两肺的血流灌注情况。

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This confirms that the PIV system can be applied to measure the instantaneous volume flow rate and investigate the unsteady characteristics.

PIV技术可用于瞬时体积流量的测量以及流场非稳态特性的研究。

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