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ＧＭ（１，１）灰色模型模拟直径分布简便易行通用，在原始数据较少的情况下，能突破传统的统计模型的局限性，也能克服统计模型繁琐复杂和参数繁多的缺点，拟合效果非常理想。
The GM (1,1) gray model simulates the distribution of diameters easily and universally. It can overcome the limitations of the traditional statistical models under the condition of less original data, and also overcome the cumbersome and complicated parameters of the statistical model. The effect is very good.