
A Stochastic System and Its Corresponding Deterministic System 369
0 10 20 30 40 50
10
0
10
1
10
2
Time (Days)
Pigs
X1 (S)
X1 (D)
0 10 20 30 40 50
10
2
10
3
10
4
Time (Days)
Pigs
X1 (S)
X1 (D)
0 10 20 30 40 50
10
1.28
10
1.3
10
1.32
10
1.34
Time (Days)
Pigs
X2 (S)
X2 (D)
0 10 20 30 40 50
10
3.29
10
3.31
10
3.33
10
3.35
Time (Days)
Pigs
X2 (S)
X2 (D)
0 10 20 30 40 50
10
1.7
10
1.8
Time (Days)
Pigs
X3 (S)
X3 (D)
0 10 20 30 40 50
10
3.7
10
3.8
Time (Days)
Pigs
X3 (S)
X3 (D)
0 10 20 30 40 50
10
0
Time (Days)
Pigs
X4 (S)
X4 (D)
0 10 20 30 40 50
10
1
10
2
10
3
Time (Days)
Pigs
X4 (S)
X4 (D)
FIGURE 8.13:
The mean of the solution to the stochastic system with a
random delay (S) and the solution to the corres ponding