- :
qe = aD + bD 2. (5.10)
E , () , a b. D 1 qe, 1, D 2 qe, 2, :
b = (qe, 1/ D 1 - qe, 2/ D 2)/(D 1- D 2),
a = (qe, 1- b D 12)/ D 1 a = (qe, 2- b D 22)/ D 2. (5.11)
, qe, , (5.10):
bD 2 + aD qe = 0,
D = (- a )/2 b. (5.12)
5.5. , , , - . 100 , , 0,1 . 11 , 9. 80 , , 0,5 . , , 18 10 . (5.5) , 0,1.
Nt ,1 = 100, D 1 = 0,1 , Nt ,2 = 80, D 2 = 0,5 , Et ,1 = 11, E ,1 = 9, E t ,2 = 18, E ,2 = 10. :
qe ,1 =(qt ,1- qc ,1)/(1- qc ,1)=[(E t ,1/ Nt ,1)-(E ,1 / Nt ,1)]/(1- E ,1 / Nt ,1) =
= [(11/100)-(9/100)]/(1-9/100) = 0,022,
qe ,2=(qt ,2- qc ,2)/(1- qc ,2)=[(E t ,2/ Nt ,2)-(E ,2/ Nt ,2)]/(1- E ,2/ Nt ,2) =
= [(18/80)-(10/80)]/(1-10/80) = 0,114.
b a (5.11):
b = [0,022/0,1 -0,114)/0,5]/(0,1 - 0,5) = 0,02,
a = (0,022 - 0,02×0,01)/0,1 = 0,22.
, - :
qe = 0,22 D + 0,02 D 2.
, qe = 0,1, (5.12):
D = [0,22 ] / (2104),
D 1= 0,42 , D 2 = 11,5 .
, , . , D = 0,42 .
- c D. ( a > 0 b > 0), (5.10) :
qe = a D.
(5.10) , :
qe = (aD + bD 2) . (5.13)
-- ( ). d, a b, . , .
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