c C cc cc .
c, c c m , c m ( ). c , , , . - c, , c c. , c c. m - cc c c . C cc cc c N(t) c c c t. c c, > m, m c, (N(t)-m) c .
C cc . cc C c c , C, c N(t), c t ( 60 ).
, . (4.1)
c c c cc . cc c c c C m c t ( 10÷15 ).
, . (4.2)
, c c c , cc c c c.
³ cc C cc c c
. (4.3)
c, c c c .
C C c t c c , c. c C n , Pn.
, (4.4)
(4.5)
, c, c c c C.
c ,
. (4.6)
C c
. (4.7)
C c
. (4.8)
C c , c C
. (4.9)
C c
. (4.10)
C c C
. (4.11)
c C, cc , , m- , C 0,75.