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3、 17497-1.2 : 8.7142010 ( 61260:1995) -.( 61260 . , MOD) 17497-12011 . . 1. - ( 17497-12011, IDT) 53188.12008 ( 61672-1:2002) . 1. ( 61672-1 . . 1. , MOD)54500.32011/98-3:2008 .3. ( / 98-3:2008, IDT) - - , 1 , , - . (), () . , , , , .3 , 3.1 :3.1.1 (classical method): , - .1 545792011( 18233:2006) 3.
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5、. . t (t =0).2 545792011 , . - 1. t 0 4L(t) = 10lgWChtdtt0 2ref()c165c242c233c235c234c234c249c251c250c250,(1) W0 ;h(t) ;Cref ., (1), , . t , - (1) . - + c165 t. . (1) , . , (1) . (1) . L0 . (1) t = 0 L0= 10lgWChtdt0 20ref()c165c242c233c235c234c234c249c251c250c250.(2) 2 , - .5.3 S , - L1 S (2) - h1(t
6、) S L1= 10lgWChtdt0120ref()c165c242c233c235c234c234c249c251c250c250.(3), - R, L2 (2) h2(t) R L2= 10lgWChtdt0220ref()c165c242c233c235c234c234c249c251c250c250.(4) D - - D = L1 L2= 10lghtdthtdt120220()()c165c165c242c242c233c235c234c234c234c234c234c249c251c250c250c250c250c250.(5)4 545792011 W0 Cref. . - .5.4 - . -, . ( ) , , ., - , . - , , . - . (2) Whtdt020()c165c242=W02c112Hd()c119c1192c45c165c165c242,(6) c119 ,H(c119) , h(t) 5 545792011L ;h ;t Lm(t) - L1(t), L2(t), , LN(t) . L(t) h(t). 2 H(c119)=F h(t) = hte dtjt()c45c45c165c165c242c119,(7) j . (6) , h(t)=0t 0, - () . (6) , . , . (5) (6),
