考虑了混凝土多相系统中固体速度、饱和度乘蒸汽密度的空间梯度和孔隙压力空间梯度；
The model includes solid velocity, space grade of saturation with vapour density and space grade of porous pressure in concrete multiphase system.
在生物降解油柱中观测到了石油总体组成、饱和烃和芳烃系列化合物随深度呈连续而系统的梯度变化。
Systematic changes seen as marked gradients in petroleum bulk composition, component concentrations and molecular indicators have been observed in biodegraded oil columns.
进而又研究了初始饱和度梯度对试井规律的影响。
Lastly, the effects of initial oil saturation gradient on them are discussed.
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