Shock and Vibration / 2018 / Article / Tab 2

Research Article

Scale Effect on the Anisotropy of Acoustic Emission in Coal

Table 2

The variation of cumulative absolute AE energy in the specimens with different sizes.

Specimen diameter (mm)25385075

Average value (109aJ)1.351.551.862.75
Coefficient of variation0.1510.1330.1160.057

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