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(dng)ǰλã߿W(xu)W(wng) > B(yng)ϱU >

ݽӋ㷽,ݹYӋ

£2023-09-20 16:00:44 ߿W(xu)W(wng)

I(y)šB(yng)ϽǸ(j)šUMvUM(sh)ݕrȫʡڍšƽY{(dio)ȫʡȫڏ(zhn)λ͘I(y)ˆTƽYݕrg͂~L~ӋÁôµĺšݺB(yng)ϽӋأB(yng)ϽӋ㷽ʲôСP(gun)֪R

(һ)y(tng)IB(yng)ϽӋ㹫ʽ

y(tng)IB(yng)Ͻ=(ȫʡڍšƽY+ָ(sh)ƽUMY)2(ҕͬUM+HUM)1%

ʽбָ(sh)ƽUMYӋ㹫ʽ飺

ָ(sh)ƽUMY=ȫʡڍšƽYƽUMYָ(sh)

()~B(yng)ϽӋ㹫ʽ飺

~B(yng)Ͻ=~􃦴~±g(yng)Ӌl(f)”(sh)

ʽСg(yng)Ӌl(f)”(sh)飺

g Ӌl(f)”(sh) g Ӌl(f)”(sh) g Ӌl(f)”(sh)

40 233 50 195 60 139

41 230 51 190 61 132

42 226 52 185 62 125

43 223 53 180 63 117

44 220 54 75 64 109

45 216 55 170 65 101

46 212 56 164 66 93

47 208 57 158 67 84

48 204 58 152 68 75

49 199 59 145 69 65

70 56

()^B(yng)ϽӋ㹫ʽ飺

^B(yng)Ͻ=ȫʡڍšƽYƽUMYָ(sh)(ҕͬUM+~ǰHUM)1.4%

()y(tng)IB(yng)Ͻ^B(yng)ϽеıƽUMYָ(sh)酢˱˚vUMYָ(sh)ƽֵ˱ˮ(dng)UMYָ(sh)鱾ˮ(dng)UMY~һȫʡڍšƽYҕͬUM޵ąˆTҕͬUMÿָ(sh)ҕͬ1.0

ƽUMYָ(sh)Ӌ㹫ʽ飺

=(X1/C1+X2/C2+X3/C3++Xn/Cn)N

ʽШ鱾ƽUMYָ(sh);

X1X2X3Xn酢ǰ1ꡢ23ꡭnꮔ(dng)걾UMY~;

C1C2C3Cn酢ǰ123ꡭnȫʡڍšƽY;

N酢ӋUM(ҕͬUM)ԡꡱλӋ㣬_С(sh)cλ;

ݮ(dng)겻Ӌָ(sh)UM”(sh)ӋUM

ǰݲو(zh)ÿǰһpl(f)2%B(yng)ϽҎ(gu)

P(gun)

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