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When GM (1, 1) model is applied to simulate a pure exponential sequence, the errors usually occur. There are many kinds of limitation to the development coefficient and the primary sequence. The characteristics of the discrete GM (1, 1) model are analogous to the GM (1, 1) model. It can be regarded as the precise form of the formal model. The paper studied the growth rate of the simulation values...
When the forecast model is to be established, the problem is often confronted that the more the sample data is, the worse the precision is. Based on the geometric sequence, the paper probes the influence on the error of the simulation value exerted by different sample numbers. The paper studies the relation between the growth rates of the primary sequence, development coefficient and the growth rates...
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