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minglang121

гæ (СÓÐÃûÆø)

[ÇóÖú] MATLAB³ÌÐòµ÷ÓÃÖгö´í£¬Çóס ÒÑÓÐ1È˲ÎÓë

%Ö÷³ÌÐò£º
echo on

a_db =[ -20:0.2:20];
a = 10.^(a_db/10);

  for i = 1:length(a_db)
    f(i)=quad('il3_8fun',a(i) - 5,a(i) + 5,[],le-3,[],a(i));
    g(i)=quad('il3_8fun',-a(i)-5, -a(i)+5 ,[],le-3,[],a(i));
    c(i)=0.5*f(i)+0.5*g(i);
  end
semilogx(a,c£©

-----------------------------------------------------------------------------------------------
-----------------------------------------------------------------------------------------------
%×Ó³ÌÐò
function f = il3_8fun (x,p)
f = 1/sqrt(2*pi)*exp(-(x-p).^2/2).*log2(2./(1+exp(-2*x*.p)));
end
---------------------------------------------------------------------------------------------------
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    f(i)=quad('il3_8fun',a(i) - 5,a(i) + 5,[],le-3,[],a(i));
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1014511134

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minglang121: ½ð±Ò+2, ¡ïÓаïÖú 2016-04-08 21:55:07
il3_8fun (x,p)ÄãÕâÀï±ßÓÐÁ½¸ö²ÎÊýµÄ£¬ÄãµÄpÊÇʲôֵ£¬ÄãµÃ¸ø³öÀ´
2Â¥2016-04-04 12:49:06
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minglang121

гæ (СÓÐÃûÆø)

ÒýÓûØÌû:
2Â¥: Originally posted by 1014511134 at 2016-04-04 12:49:06
il3_8fun (x,p)ÄãÕâÀï±ßÓÐÁ½¸ö²ÎÊýµÄ£¬ÄãµÄpÊÇʲôֵ£¬ÄãµÃ¸ø³öÀ´

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3Â¥2016-04-04 23:04:55
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

minglang121

гæ (СÓÐÃûÆø)

ÒýÓûØÌû:
3Â¥: Originally posted by minglang121 at 2016-04-04 23:04:55
¼ÙÉèp£½?£¬ÔõôÔÚÖ÷³ÌÐòÀïÌåÏÖ³öÀ´ÄØ £¿
...

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4Â¥2016-04-04 23:05:33
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1014511134

ר¼Ò¹ËÎÊ (ÕýʽдÊÖ)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

@(x)il3_8fun (x,1/2),ÎҸоõ¿ÉÒÔÕâÑù´«µÝ
5Â¥2016-04-05 11:49:33
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

minglang121

гæ (СÓÐÃûÆø)

ÒýÓûØÌû:
5Â¥: Originally posted by 1014511134 at 2016-04-05 11:49:33
@(x)il3_8fun (x,1/2),ÎҸоõ¿ÉÒÔÕâÑù´«µÝ

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6Â¥2016-04-08 22:00:02
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