By use of the Grey Model theory, this paper forecasts NingXia' s traffic accident trend in the following five years.
运用灰色预测理论，对宁夏未来几年的交通事故形势作了预测；
Methods: Contacting relation degree of Grey Model Theory was used in analyzing ten reasons of effecting cesarean section rate.
方法：采用灰色系统理论关联度分析法，对影响剖宫产率的十种因素进行分析。
The naval vessel bearing series is a kind of time series, which contains grey information. The Grey Model Theory is a strong weapon of dealing with grey information.
舰船方位序列是一种带有灰色信息的时间序列，灰色系统理论是处理灰色信息的有力武器。
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