79
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% ! ":
P = (PW / W
) U100 %. (2.17)
, "< '
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W
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B = (PW / W)
U100 %. (2.18)
" , !
$ , "'% ", -
% : $ $+-
', $+'.
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$+' , % "' " -
. ! $+'% >"'' -
$" +"
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> , "%.
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$+, . . ! "!! -
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~ = + b, (2.19)
" "' ", $+-
'%, . . & > $+' , " "'
" : 20
}
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