Research Article

Evaluation of Underground Zinc Mine Investment Based on Fuzzy-Interval Grey System Theory and Geometric Brownian Motion

Table 2

Transformation .

20092010201120122013

16582160219519501910
4102162078392
8381728178117841726
16582160219519501910
24782592260921162094
820432414166184
13852016205718951849
19312304233320051971