, .
, .
( , ) (, ). .
. , , .
. , :
l(t)=l=const, (25)
l=1/T; T ( ). l , , .
P(t)=e-ïldt = e-ldt. (26)
.
(): , ; - ; ; - .; , ( ; , , , ).
: .
, , l(t)£ 0,1, :
P(t)=1-lt+(lt)2/2! -(lt)3/3! + 1-lt. (27)
( )
f(t)=-dP(t)/dt=le-lt. (28)
l(t)tt/T 6.
. () ().
() , .
.6.
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|
() , , , . , , , .
.
(. 7), , .
. 7.
, , .. , . , , ..
P(t)=P1(t)P2(t)Pn(t). (29)
P1(t)=P2(t)==Pn(t),
P(t)=P1n(t) (30)
. , 10 0,9 ( ), 0,910=0,35.
, , P1(t), P2(t),, Pn(t) ,
P(t)=(1-Q1(t))(1-Q2(t))(1-Qn(t))=1-(Q1(t)+Q2(t)++Qn(t)), (31)
.
Q1(t)=Q2(t)==Qn(t), (32)
P(t)=1-nQ1(t). (33)
P1(t)=0,99. Q1(t)=0,01 P(t)=0,94.
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