( ) [8,9,15]:
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- Z1/2, , - ;
- I, , - ( );
- Zo, - .
, - ( . 4.11).
≤2 , .4.12, - Z1/2 Zo. >2 , I.
Z1/2 , .
-, - , Z1/2 ( CD . 4.13). , . 4.14 .
CD /2.
, , .
, Z1/2≥50 (. 4.14), , ( . 4.13).
I , , 100/σ (σ , /3) .
I
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|
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, , 100/σ (σ , /3) . , - . (. 4.11).
Zo , ( 20 ) (. 4.15), .
Zo ( CD . 4.15) . 4.16 2 lo.
(4.9)
- .4.15.