And gray forecast finds and grasps system tendency to make scientific quantitative forecast of system’s future condition by processing initial data and establishing gray model.
灰色预测就是通过原始数据的处理和灰色模型的建立,发现、掌握系统发展规律,对系统的未来状态做出科学的定量预测。
参考来源 - 灰色预测GM（1，1）和GM（2，1）模型的改进研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The methods commonly used for cost forecast are the qualitative forecast and quantitative forecast.
成本费用预测常用的方法为定性预测和定量预测。
Quantitative forecast of the leakage from karst reservoirs which is influenced by many factors has been a interesting research point.
岩溶水库渗漏受众多因素影响，对其渗漏量预测一直是水利工作者的研究热点。
To do good the work of city earthquake prevention and disaster relief, the key is the quantitative forecast of intending seismic disaster.
做好城市防震减灾工作，关键是对未来可能遭遇地震灾害定量化预测。
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