The recovery was assessed by a concentration difference method.
探针回收率用浓差法计算。
The pressure equation is solved by mixed finite element method, while the concentration equation is solved by finite difference-streamline diffusion finite element method, that is, using SD f.
提出了解不可压缩两相混溶驱动问题的一种新的数值方法，压力方程用混合有限元求解，浓度方程用差分流线扩散方法求解。
Salt concentration difference macrocell corrosion of X70 steel in yellow pebble soil was studied by means of EIS and weight loss method.
利用电化学阻抗法和失重法，研究了X70钢在卵石黄泥土中的盐浓差宏电池腐蚀。
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