These results are necessary for solving the problem of elastic-plastic wave propagation in a bar.

这些结果对于解决杆中弹塑性波传播问题是必需的。

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In addition, the trend of microhardness variety could not accord with the ultra-plastic wave formula.

合金的显微硬度变化趋势不符合超塑性波动公式。

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Numerical modeling result proves that plastic wave model shows more seismic wave properties than others do.

模拟结果表明，塑性波模型能更多地反映出地震波的传播特征。

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Instead of opening wallets in shops and being confronted with a choice of whether to pay by cash or plastic card, they will wave a phone at the checkout.

ECONOMIST: Consumer banking