, t .
,
:
( , , )
No p(t) = p1(t) * p2(t) * . * pi(t) * * pNo(t) = pi(t) i=1 | (1.5) |
, .
p1(t) = p2(t) = = pi(t) = = pNo(t) =P(t) |
No p(t) = [p(t)] | (1.6) |
p(t) < 1, 1.5 :
1)
2) .
Q(t)
, t , .
Q(t) = 1 p(t) = 1-p1(t) * p2(t) pi(t) pNo(t) | (1.7) |
Q(t) = 1 {[1-q1(t)] * [1-q2(t)] [1 qi(t)] . [1-qNo(t)]} | (1.8) |
:
No Q(t) = 1 [1 q(t)] | ((1.9) |
, , <<1
qi(t) <<1
qi(t)*qi+t(t) 1.8 , 1.8
No Q(t) ≈ 1 { 1- [q1(t) + q2(t) + + qi(t) + qNo(t)]} = ∑ qi(t) i=1 | (1.10) |
, 1.10 .
Q(t)≈ Noq(t) | (1.11) |