. .
, ν . . . (), .
.
. , .
, () - , , . .
:
- .
- , .
- , .
- .
- . , , , .
:
- t . Δt .
(t) (1 - λ Δt); (3.1.)
- t . Δt .
(t) Δt; (3.2.)
(t+Δt)= (t)(1-λΔt)+ (t) Δt) ν Δt (3.3.)
Δt→ 0,
(t) = - (t) λ + (t)ν . (3.4.)
. :
- t . Δt .
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(t) (1 - λ Δt)(1- ν Δt); (3.5.)
- t . Δt ,
(t) (ν Δt); (3.6.)
- t . Δt , , . .
(t) ν Δt. (3.7.)
(t) = - (t)(λ+ ν ) + (t) ν + (t) ν . (3.7.)
, :
- t . Δt .
(t) λ Δt; (3.8.)
- t . Δt .
(t)(1- ν Δt); (3.9.)
- t . Δt .
(t) ν Δt. (3.10.)
(t) = (t) λ - (t)ν + (t)ν . (3.11.)
, :
- t . Δt
(t) λ Δt; (3.12.)
-- t . Δt .
(t)(1- (ν + ν )Δt); (3.13.)
(t) = (t))λ+ (t)(ν + ν ). (3. 14.)
, , :
(t) = - (t) λ + (t)ν .
(t) = - (t)(λ+ ν ) + (t) ν + (t) ν . (3.15.)
(t) = (t) λ - (t)ν + (t)ν .
(t) = (t))λ+ (t)(ν + ν ).
, .. , ,
, . :
t → ∞, (t) →0, (t) = = const. :
(t) λ = (t)ν .
(t)(λ+ ν )= (t) ν + (t) ν . (3.16.)
(t)ν = (t) λ + (t)ν .
(t)(ν + ν ) = (t))λ.
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(3.16), - :
=
=
=
= =
λ - .
,
=1- =1- .
. 2 (λ= 2 ./. .). , (ν = 2 ./. .). 4 ν = 4./. .).
.
=1- =1- .= 0,44.
17 2006 . 613