设计误差是指因在抽样调查方案设计过程中的错误而导致产生的系统性误差。在抽样方案的设计中，涉及抽样框的编制、目标量和估计量的设计、样本容量的确定和抽样方式的选择等，抽样方案的设计还直接关系到在样本的抽取过程中是否严格地遵循随机性原则，若破坏了随机性原则，必然会产生系统性误差。
超压泄放设计系统程序完成后经过算例的考核，平均设计误差为6%左右。
The program for venting design has been checked up by factual examples and the error of the design in under 6%.
插齿刀的齿形角一般按齿形角修正公式来求，但此时的齿形设计误差不是最小。
Calculates the tooth profile Angle of pinion cutters with the corrected formula of tooth profile Angle. However, under this condition, the tooth profile designing error is not smallest.
证明了在存在噪声干扰及网络设计误差的情况下，网络训练过程具有指数收敛性和鲁棒平稳性。
The exponential convergence of the training process and its robust stability to the noise perturbances and the network design errors are also proved.
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