注意，敲打之间的差别并不是简单混合在一起的：很多次敲打时的少量时间差别并不会累积成总体的匹配失效。

Note that the differences between knocks is not compounded: missing the timing on many knocks by a small amount will not accumulate into a total match failure.

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模量匹配光纤光栅应变传感器与其它类型传感器相比具有较好的测试效果，同时该类型传感器在一定程度上能够反映出沥青混合料的累积变形。

Compared with other kinds of sensors, module matching FBG has a better test effect, and this kind of FBG is able to reflect the accumulative deformation of asphalt mixture to some extent.

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还开发了多帧匹配时的倒匹配方法，减少了多帧匹配的累积误差。

A backward registration method was proposed to reduce the accumulation error of registration of multiple depth pictures.

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