After comparing several common CAD modeling methods, the cubic parameter-spline curve is used to approach and interpolate discrete contour of usual and complicated rocket jet.
通过对几种常用的CAD造型方法的比较，对常用而复杂的喷管离散点型轮廓段的拟合插值采用三次参数样条曲线来完成。
The usual models predict the future exchange rate only based on the information provided by the history values such as time series modeling.
固有模型只是根据汇率的历史值所提供的信息预测未来的现汇汇率。如广泛应用的时间序列模型。
In this paper, a test system to pure water hydraulic gear pump for modeling test was designed, which is used to test cavitation property except for usual property and life test.
本文还设计了一套对纯水液压泵进行型式试验的纯水液压试验系统，除了对齿轮泵进行一般的性能和寿命试验外，还可对其进行气蚀性能的研究。
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