f (t) = ( 0,4343 / t slgt Ö 2 p) exp{- [(lgt lgm0)2 / 2 slgt2]},
lgm0 slgt N
lgm0 = S lgti / N,
slgt = Ö S (lgti - lgm0)2 / (N 1)
, t0, ,
f (t) = (0,4343 / [(t - t0)slgt Ö 2p]) exp{- [(lg(t - t0) lgm0)2 / 2 slgt2]},
, , , , .
:
F (t) =1 - exp (- tb / t0)
t0, b - . (b - , t0 - )
:
f (t) = a b tb - 1 exp (- a tb).
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b < 1 ;
b = 1 ;
b = 2 ( , );
b = ( 3,33,5 ) .
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