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在铀同位素分离领域中，价值函数和分离功率是非常重要的物理量。半个世纪以来，价值函数得到广泛的应用，但其物理意义则未得到明确的解释。本文引入了同位素气体混合物中丰度分布的有序度的概念，并指出价值函数就是正比于同位素气体混合物中丰度分布的有序度的一个物理量，从而给出了价值函数和分离功率的明确的物理意义，并由此出发给出了多元同位素分离过程的价值函数和分离功率的表示式。
In the field of uranium isotope separation, the value function and separation power are very important physical quantities. For half a century, the value function has been widely used, but its physical meaning has not been clearly explained. This paper introduces the concept of order degree of abundance distribution in isotope gas mixture and points out that the value function is a physical quantity proportional to the degree of order of abundance distribution in isotope gas mixture and gives a clear value function and separation power The physical meaning of the multivariate isotope separation process and the representation of the separation function of the multivariate isotope separation process.