In the data object model approach, you need to first create the wrapper objects to encapsulate the customer and order data, as shown in Listing 1, Listing 2, and Listing 3.
按照数据对象模型方式，首先需要创建包装器对象来封装客户和订单数据，见清单1、清单2和清单3。
In this paper, the Kalman filter approach is used to accurately estimate the parameters of first-order model for the evaluation of roundness errors.
本文利用卡尔曼滤波方法精确地估计圆度误差评定中一阶模型参数。
The numerical results show that for reasonable reactivity inputs, a sufficient accuracy can be achieved in first order polynomial approach presented here.
数值结果表明：在隐式一阶多项式近似下，对合适的反应性输入能够取得足够精确的结果。
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