Some kinds of trend curve model character are analysed mainly. On the basis of them, the methods of identifying and choosing the trend extend forecast model are discussed.
分析了几种常用趋势线的模型特征，探讨了趋势外推预测模型的识别与选择方法。
This paper also applied the model in the forecast of capital airport passenger throughput, and compared the results with trend analysis.
以北京首都机场的旅客吞吐量预测为例进行了应用研究，采用趋势分析法对预测结果进行了检验。
To monitor the height oftailings dam and forecast its trend, a designed method based on gray system theory to create the model of tailing dam saturation line is presented.
为了实现对尾矿坝浸润线高度进行实时在线监测及趋势预测，提出了用了灰色系统理论来对尾矿坝的浸润线数据建立灰色模型的方法。
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