本文总结介绍了国外几个著名的形态分布计算软件包中所采用的活度系数计算公式，并比较了各自的优缺点及其适用范围。
The author reviews the activity coefficient formula employed by some famous international speciation calculation programs and compares their advantages, disadvantages and their valid range.
评价了几种三元系几何模型，利用统一溶液模型推导出新的预测活度相互作用系数公式。
The activity interaction parameters between alloying elements and P in liquidFe at 1873K were obtained by the thermodynamic calculation.
评价了几种三元系几何模型，利用统一溶液模型推导出新的预测活度相互作用系数公式。
The activity interaction parameters between alloying elements and P in liquidFe at 1873K were obtained by the thermodynamic calculation.
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