The precision of gray model GM(1,1)is higher than linearity model;
滁州市客源灰色GM（1，1）模型的预测精度高于线性模型；
MATLAB program, which can be used in the whole procedure of modeling and testing a gray model GM(1,1), was designed in this paper.
用MATLAB语言将灰色系统理论中的GM（1，1）模型，从建模到模型的检验过程编制成一个普适程序。
This paper deals with the application of the improved gray theory to the prediction of subgrade settlement and improvement of equally spaced gray model GM (1.1).
讨论了灰色系统理论在路基沉降预测中的应用，并对等间隔的灰色模型GM（1，1）进行了改进，建立了任意间隔的非时序改进灰色模型。
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