Path Planning of Ant Colony Algorithm Based on Decision Tree in the Context of COVID-19

Algorithm 2

Rule 1.

1: if the number of neighbors of i marked with ‘3’ ≥ 4 then %The i indicates the location to be identified

2:  i←3;  %The 3, 2 and 1 represent high risk, medium risk and low risk areas respectively

3: elseif  the number of neighbors of i marked with ‘3’ ≥ 1 then

4:  i←2;

5: elseif  the number of neighbors of i marked with ‘2’ ≥ 4 then

6:  i←2;

7: elseif  the number of neighbors of i marked with ‘2’ ≥ 1 then

8:  i←1;

9: elseif  the number of neighbors of i marked with ‘1’ ≥ 4 then

10:  i←1;

11: else

12:  i←0;  %The 0 indicates the location to be identified