. . , . .
. ( 28 ). , 3; 7; 60; 90; 180 .
, , , 15%.
0,95 : b1; b1,5; b2; b2,5; b3,5; b5; Bb7,5; b10; b12,5; b15; b20; b25; b30; b35; b40; b50; b55; b60. /2 (10).
: b50; b75; b100; b150; b200; b250; b300; b350; b400; b450; b500; b600; b700; b800.
n = 0,135 t = 0,95 :
b = Rb 0,778, Rb = b / 0,778.
, . . 1.
. , . , . : t0,8; Bt1,2; Bt1,6; t2; Bt2,4; t2,8; t3,2 : t10; Bt15; Bt20; Bt25; Bt30; Bt35; t40.
. , .
: bt0,4; bt0,8; bt1,2; Bbt1,6; bt2,0; tb2,4; bt2,8; bt3,2; bt3,6; bt4,0; Bbt4,4; bt4,8; bt5,2; bt5,6; bt6,0; bt6,4; bt6,8; bt7,2; bt8.
, . : , , (/), , , , .
. Rb = f(R). .
. . , . , . 1 3 600 .
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. /. / , . . 15-25% . 40-70% (/ = - 0,4...0,7). , .
/ 0,4 0,7 (/ = 2,5... 1,43) R, , R, , / , :
Rb = A R (/ 0,5).
/ < 0,4 (/ > 2,5) . :
Rb = A1 R (/ + 0,5).
2-4 % : 1 , . = 0,65, 1 = 0,43, = 0,50, 1 = 0,4; = 0,55, 1 = 0,37.
Rbt, , :
Rbt =A` R` (/ - 0,2),
R , ;
' , .
' = 0,42, - ' = 0,4, ' = 0,37.
. , , , . , .
. , , - , 20-30%. , 1% 3-5%.
. :
Rb(n) = Rb(28) lgn / lg28,
Rb(n) Rb(28) n 28 , ; lgn lg28 .
. , 15-20 3 300 . .
, , . (. 2).
/. , . 3, /.
. - 15-20 90-100%.
.
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() , . , ( ) . , .
, ( I), ( II). , ; ; ; , . , . .
. (. ), , . , .
.