Table 2 Orthogonal test factor level settings for transparent rock-like materials.

From: Proportioning optimization of transparent rock-like specimens with different fracture structures

Factor level

A

B

C

Level representation

1

0.67

0.33

6

Low

2

1.0

0.5

12

Lower

3

1.3

0.67

18

Medium

4

1.6

0.83

24

Higher

5

2.0

1.0

48

High

  1. The freezing temperature is set at -25 ℃. The freezing temperature during the experiment is a fixed quantity, and no changes were made to the temperature.
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