灰色系统预测模型是一种进行港口吞吐量预测的有效方法。
The grey system model is efficient for long-term port throughput forecasting.
通过实例预测并与灰色系统预测模型方法进行比较，结果表明，其预测值相当接近。
By forecasting a case and comparing it with the method of grey system forecasting model, we can see that the forecast results are very close.
通过建立造价指数的灰色系统预测模型可以算出未来造价指数的灰元值和进行短期、中期和长期的预测。
The grey element value of cost index would be figured out by way of establishing cost index′s presumption model that is a grey system.
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