Table 2 Optimum cover thickness under different possibility levels.

From: Fuzzy optimal control of multilayer coverage based on radon exhalation dynamics in uranium tailings

\(\alpha\) Cut set

\(x_{1}\)

\(x_{2}\)

\(x_{3}\)

\(U_{GC}\)

0.1

0.4678

0.2200

0.3111

1.0000

0.2

0.4242

0.2562

0.3022

1.0000

0. 3

0.4532

0.2293

0.3087

1.0000

0.4

0.4624

0.2204

0.3125

1.0000

0.5

0.4202

0.2606

0.3142

1.0000

0.6

0.4267

0.2505

0.3199

1.0000

0.7

0.4201

0.2608

0.3200

0.9977

0.8

0.4220

0.2615

0.3200

0.9911

0.9

0.4223

0.2638

0.3200

0.9847

1.0

0.4226

0.2662

0.3200

0.9782