.
(26).
(52) (53) .
, . , , .
Y
ko , (3.6).
νi i :
νi = mi 1 - u (Xi)
νi = ∞ - u (Xi) .
Y Yk Xik. Yk (k =1 m) , 3.6. , , , (31) .
. , , ; , ; ; ..
,
i =+1 -1 .
i ( ) . , . ρij [25] .
17. 50 80 2, 4 .
. , 5 , , 40,50,60 70 10 . , Δ 40-70 = 4 Δ 10 = 2 .
|
|
2 : Δ = 5 .
. . . :
u B.40-70= Δ 40-70 /√3=4/1,73=2,31, u B.0-10=2/√3=1,15 , u B.=5/√3=2,89 .
. ,
. 0,95 , 2.
U = ko∙uC = 2∙4.36=8,72 .
(. 3.9) U =9 .
18 [21].
I = f(V,R)=V/R,
I - , V - , R - .
t=(23.000,05)0C Vi, (i = 1, , n; n= 10): 100,68; 100,83; 100,79; 100,64; 100,63; 100,94; 100,60; 100,68; 100,76; 100,65.
I=10 t=230C : R0=10,088 O
,
(53)
, . .
1. Δ=3∙10-4∙V+0,02. uB,V
2. , , 7∙10-4∙R. R=R 0
3. , , α·Δt· R0.
α=6∙10-6-1 . Δt = 0,050
uB,I (52)
υeff (55)
0,95 k ( 8)
k=tP(υeff)=t 0,95(87)=1,99
U0,95(I)= ko · uC(I) = 1,99·6,0·10-3 = 0,012 A
: I = 9,984 , U =0,012 , ko = 2, =0,95.
.
, ,
( ):
|
|
, , δ R =0,07%.
Δt = 0,050.
.
= 0,95
.
S
= 0,95
I = (9,9840,012) , =0,95.
-
Δ (Xi) - Xi.
19. ( ) .
Rmax = 150 1,5
Umax = 300 B 2,0
Imax = 25 A 2,5.
.
U =180 , I =10 , R =18 .
Δ R =1,5 · 150 / 100% =2,25 .
R=U/I, (56)
Δ U Δ I -
Δ U = (2∙ 300/100) = 6
Δ I = (2,5∙ 25/100) = 0,625
Δ R > Δ R, , .