本文根据熔渣离子理论的正规离子熔液模型要点，基于一般三元系，对正规离子熔液模型渣的组元活度计算公式进行了详细推导。
Formulas giving the activities of components in slags viewed a ternary system which fits the regular ionic solution model deduced from the ionic theory of slags, are derived in detail.
应用分子相互作用体积模型对二元和三元液态合金的组元活度进行预测及拟合，计算结果与实验数据吻合较好。
The Molecular Interaction Volume Model(MIVM) is introduced for the prediction and fitting of the activities of liquid alloys Ni-Mg-Cu, Ni-Al-Si and Ni-Cu-Co in the ternary systems.
应用分子相互作用体积模型对二元和三元液态合金的组元活度进行预测及拟合，计算结果与实验数据吻合较好。
The Molecular Interaction Volume Model(MIVM) is introduced for the prediction and fitting of the activities of liquid alloys Ni-Mg-Cu, Ni-Al-Si and Ni-Cu-Co in the ternary systems.
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