分析了大气边界层扩散条件、大气污染源分布及预测、大气污染现状。
The paper analyses the diffusion conditions of air boundary layers, the distribution and forecast of source air pollution and the current situation of air pollution.
这一不透气的壳层(或边界层)会阻滞水分自由扩散，这种情形称为表面硬化。
This impervious layer or boundary will retard the free diffusion of moisture. This condition is referred to as case hardening.
各种操作条件只有影响到管程的温度边界层或壳程的冷凝液膜层和气-汽扩散层，才能强化或恶化传热过程。
When various manipulations disturb the thermal boundary layer inside or the condensate film and gas-vapor diffusion layer outside, the heat transfer effect will be better or be worse off.
其收敛性的证明是依据其渐近扩散展开式，在边界层上得到的误差估计逼近其离散纵标方法的解。
Our proof of the convergence is based on an asymptotic diffusion expansion and requires error estimates on a matched boundary layer approximation to the solution of the discrete-ordinate method.
对大气边界层内大气湍流和建筑物对道路交叉口处机动车排放气态污染物扩散的影响进行了研究。
The effect of atmospheric turbulence and buildings on the dispersion of gaseous pollutants emitted from motor sources was investigated at the road intersection in the atmospheric boundary layer.
该模型不仅考虑了非稳态下膜相扩散阻力，而且还考虑了外相边界层的扩散阻力及膜破裂。
This model takes into account both the diffusion resistance of the membrane phase in non-steady state and the diffusion resistance of the external phase boundary film and the membrane leakage.
边界层的特征在于被氧化离子的浓度梯度，还原剂离子的扩散通过边界层控制了氧化还原反应。
The boundary layer is characterized by a concentration gradient of the oxidized ion. Diffusion of the reducing agent ion through the boundary layer controls the REDOX reaction.
为求解二维的奇异摄动反应扩散边界层问题，研究了新的多尺度有限元法。
The multi-scale finite element method is applied in the 3-D groundwater flow simulation problems in heterogeneous porous media.
为求解二维的奇异摄动反应扩散边界层问题，研究了新的多尺度有限元法。
The multi-scale finite element method is applied in the 3-D groundwater flow simulation problems in heterogeneous porous media.
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