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Shock and Vibration
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2018
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Article
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Tab 1
/
Research Article
Scale Effect on the Anisotropy of Acoustic Emission in Coal
Table 1
The variation of cumulative AE counts in the specimens with different sizes.
Specimen diameter (mm)
25
38
50
75
Average value (10
5
)
4.80
6.30
8.43
13.95
Coefficient of variation
0.151
0.133
0.116
0.057