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基于河南省城市体系的人口数据提出在分形结构退化情况下利用单对数型 Ｌｏｒｅｎｚ曲线计算城市规模分布的 Ｇｉｎｉ系数的方法之一：首先借助式∑ｋ Ｐ （ｋ）＝ Ａ＋ Ｂｌｎｋ 计算待定系数 Ａ、 Ｂ，然后运用 Ｇ＝ （ Ａ－ Ｂ－ Ｂｌｎ Ｎ５０）／５０ 算出 Ｇｉｎｉ系数 Ｇ 值。文章以实例说明了计算 Ｇ 值的程序。
Based on the population data of urban system in Henan Province, this paper proposes one method to calculate the Gini coefficient of city size distribution using single logarithm Lorenz curve under the condition of fractal structure degeneration: First, calculate the coefficient A to be determined by the formula Σk P (k) = A + Blnk , B, and then use G = (A- B-Bln N-50) / 50 to calculate Gini G value. The article illustrates an example to calculate the G value of the program.