This paper introduces the reform concept and realization method based on S7-200 PLC on trip fault and the wavy pressure behind engine in the process of compressing.
针对煤气加压机在加压过程中经常跳闸和煤气管网压力波动较大导致机后压力不稳定的情况，介绍了采用S 7-200 P LC对该系统进行变频器改造的原理和实现方法。
In this paper, simulation is made of the processing of wavy interface generation in explosive welding using a two-dimensional difference scheme for elastic-plastic materials.
波状界面是爆炸焊接的一个重要特征，利用弹塑性材料的二维有限差分方法模拟爆炸焊接中的波状界面结合过程。
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