中文摘要：

为一个一般三元系统的分子的相互作用体积模型(MIVM ) 为它的一般 multicomponentexpression 的进一步的澄清并且理解详细被推出。MIVM 和统一相互作用参数形式主义(UIPF ) 能被用来在 Fe-Cr-Ni 液体合金预言溶质和溶剂的活动。但是前者仅仅采用无限冲淡活性系数，并且没有 dilute，以后不是适用的二进制、第三的相互作用参数。MIVM 从统计热力学的观点有某个物理意思，因此它是为溶质和溶剂的活性系数的评价的一种选择在一 dilute 或相互作用参数是不在的有限集中金属答案或他们的精确性是可疑的。

英文摘要：

The molecular interaction volume model （MIVM） for a general ternary system was deduced in detail for further clarifying and understanding its general multicomponent expression. Both MIVM and the unified interaction parameter formalism （UIPF） can be used to predict the activities of solutes and solvents in the Fe-Cr-Ni liquid alloys. But the former employs only the infinite dilute activity coefficients, and the later is not applicable without the dilute binary and ternary interaction parameters. MIVM has a certain physical meaning from the viewpoint of statistical thermodynamics, so it is an alternative for the estimation of activity coefficients of the solutes and solvents in a dilute or finite concentration metal solution where the interaction parameters are absent or their accuracies are questionable.