: , , . .
, , , . , [3].
. :
- S 0(t) P 0(t), ,
- S 1(t) P 1(t) - .
= P 0 , = P 1 - . 3.3 ().
, , . . [5]:
P k(t) t k k - ( k - ) , k - . , , k - , - .
,
(3.33)
dP 0(t) / dt = - λ · P 0(t) + μ · P 1(t); (3.34)
dP 1(t) / dt = λ · P 0(t) - μ·P 1(t); (3.35)
P 0(t) + P 1(t) = 1. (3.36)
, P k t dP (t) / dt = 0 (3.34) (3.36)
0 = - λ · P 0 + μ·P 1; (3.37)
P 0 + P 1 = 1. (3.38)
P 0 = (μ / λ)· P 1 = (μ. / λ)·(1- P 0) = (μ / λ) (μ · P 0) / λ. (3.39)
P 0 = (μ / λ) / (1 + μ / λ) = μ / (λ + μ) = ; (3.40)
P 1 = 1- P 0 = λ / (μ + λ) = . (3.41)
, μ λ
μ = 1 / , (3.42)
λ = 1/ , (3.43)
, - .
:
= / ( + ), (3.44)
= / ( + ). (3.45)
|
|
(t) - , t, , , , .
(t) = × (- λ×t). (3.46)
. , , .
k (t), - , , ( ). , k (t) [19, 21]:
(3.47)
t → ∞
k (t) = . (3.48)
- [21].
() , , . - . [3, 14].
. 3.3 (). , . . . , (3.29). :
dP 0(t) / dt = - P0 (t)×(λ + Ʋ ) + μ × 1(t) + μ × 2(t); (3.49)
dP 1(t) / dt = λ · P 0(t) μ × P 1(t); (3.50)
P 0(t) + P 1(t) + 2(t) = 1. (3.51)
: μ λ (3.42) (3.43); μ ( ), Ʋ - (τ )
= 1 / μ , (3.52)
τ = 1 / Ʋ . (3.53)
t → ∞ [3]:
= / [ + + ×( / τ)]. (3.54)
, , [5]:
τ = (2× × )0,5. (3.55)
, :
|
|
= / ( + + ), (3.56)
( / τ ) (3.54) .
, 3.3 () (t) λ (t). . . , - [3]:
(3.57)
P (t) - , , .
- , , . . () - () () [14].
, ,