Realizing of algorithm of composite data filter and eliminating singular term using first difference method in data collection and processing were analyzed and calculation results were given.

介绍了建材检测微机控制系统总体结构，详细分析了数据采集与处理过程中复合数据滤波、一阶差分法剔除奇异项算法的实现过程，给出了计算结果。

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On the basis of classic theory and formula, the flier plate action rule was first studied with the method of the numerical difference in characteristic line.

在经典理论及公式的基础上利用特征线数值插分方法对飞板运动规律进行研究。

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First, constructed high order staggered-grid difference formulas, and discussed the stability and numerical dispersion of staggered grid method.

首先，构建高阶交错网格差分公式，讨论了交错网格法的稳定性与数值频散。

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