, U (t) , U 0, , (. 1).
. , 80 - 90 % , (U 1 U 2, . 1) .
, U (t*) U (t*) C, C.
, . 2. C U 0. , R t, :
, (1)
U (t) - , t q (t) . : . , , t:
. (2)
I (t) ( ), .
(1) (2) ( I (t) ), :
, .
:
.
A : t = 0 U (t) = 0, A = - U 0. , (. .1):
. (3)
(3): ,
. (4)
(4), :
,
:
.
, :
, (5)
k = t */ R, U 0, R t * . U 0 .
(5) , k , U (t *) C 0.