, . . , i, . , :
(88.1)
, ( , . 91) . ,
(88.2)
æ , ; æ - ; æ > 0 ( ) (, , æ 25, æ = 80).
0 ( ) , , . 135. , . . : , . , , + s¢, - s '. , , . s¢ s , : , . , . = .
. 135
, ' (, ), 0 (, ) .
' = s'/e0(, ; . (82.2)),
(88.3)
s '. (88.1), pv = PV = PSd, S , d . , , (80.3), Q' = s'S d , . . pv = s'Sd. , PSd = s'Sd,
(88.4)
. . s ' . (88.3) (88.4) (88.2),
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(88.5)
(88.6)
. (88.5) (88.6), , e , , .