本文采用自回归模型得到肝脏组织不同区域的超声结构散射频谱，并对其频谱特征进行了统计分析。

In this paper, the ultrasonic spectra of liver's structural scattering were obtained by using autoregressive model, and the spectral characteristics were analyzed statistically.

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股票价格的频繁波动是股票市场最明显的特征之一，自回归条件异方差类模型可以很好地预测金融资产收益率的方差。

Frequent volatility is a feature of stock market. Autoregressive Conditional Heteroscedasticity (ARCH) model is often used to forecast the variance of the benefit of financial capitals.

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结果表明，所提出的的截面弯矩-曲率关系三折线模型中，各无量纲特征参数的统计回归公式具有较好的精度。

The results show that the regression formulas for the characteristic parameters in the proposed trilinear model are of excellent precision.

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