The model consists of a finite number of regression classes, for each of them the model error may normal or arbitrary under certain conditions.

该模型由有限个回归类构成，每个类的模型误差可以是正态的，也可以是满足一定条件的任意分布。

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Compares the accurate reliability value with the designed value of the reliability of the exponential distribution normal distribution model and gives the relative error.

对指数—正态模式结构可靠度的理论值与设计值进行比较，给出它们之间的相对误差估计。

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Besides, this paper also presented the model of normal error between actual surface and theoretic surface and probed into the calculating method of normal error.

此外，本文还建立了实际曲面与理论曲面之间的法向误差模型，对法向误差的计算过程进行了说明。

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