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F0(¦Ç)=¡Ò0^¡Þ¡¼x/(1+e^(x-¦Ç)dx¡½
F1(¦Ç)=¡Ò0^¡Þ¡¼1/(1+e^(x-¦Ç)dx¡½
F2(¦Ç)=¡Ò0^¡Þ¡¼x^2/(1+e^(x-¦Ç)dx¡½
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CODE:
F01=quadgk(@(x) x./(1+exp(x-1)),0,inf)

F01 =

    1.8063

>> F02=quadgk(@(x) x./(1+exp(x-2)),0,inf)

F02 =

    3.5139

>> F03=quadgk(@(x) x./(1+exp(x-3)),0,inf)

F03 =

    6.0958

>> F11= quadgk(@(x) 1./(1+exp(x-1)),0,inf)

F11 =

    1.3133

>>  F12= quadgk(@(x) 1./(1+exp(x-2)),0,inf)

F12 =

    2.1269

>>  F13= quadgk(@(x) 1./(1+exp(x-3)),0,inf)

F13 =

    3.0486

>>  F21= quadgk(@(x) x.^2./(1+exp(x-1)),0,inf)

F21 =

    4.3283

>> F22= quadgk(@(x) x.^2./(1+exp(x-2)),0,inf)

F22 =

    9.5127

>> F23= quadgk(@(x) x.^2./(1+exp(x-3)),0,inf)

F23 =

   18.9686

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2Â¥2014-07-31 18:48:06
ÒÑÔÄ   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
3Â¥2014-08-05 14:04:11
ÒÑÔÄ   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

@ѰÕÒ·½Ïò@

½ð³æ (ÕýʽдÊÖ)

Ëͺ컨һ¶ä
ÒýÓûØÌû:
2Â¥: Originally posted by ÔÂÖ»À¶ at 2014-07-31 18:48:06
ÊýÖµ»ý·Ö¡£
ÄãÒª¼ÆËãµÄÊÇÈçͼÖеĻý·ÖʽÂð£¿
Èç¹ûÊǵϰ£¬½á¹ûÈçÏ£º
F01=quadgk(@(x) x./(1+exp(x-1)),0,inf)

F01 =

    1.8063

>> F02=quadgk(@(x) x./(1+exp(x-2)),0,inf)

F02 =

    3. ...

¶àл¸ßÊÖÏàÖú¡£ÎÒÏë¼ÆËãÂåÂØ×ȳ£Êý£¬ÐèÒªÓõ½·ÑÃ×»ý·Ö£¬ÇëÎʿɷñÖ¸µãһϣ¿
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4Â¥2014-08-07 09:41:57
ÒÑÔÄ   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

Q.K.Zhang

Òø³æ (Ö°Òµ×÷¼Ò)

ÒýÓûØÌû:
4Â¥: Originally posted by @ѰÕÒ·½Ïò@ at 2014-08-07 09:41:57
¶àл¸ßÊÖÏàÖú¡£ÎÒÏë¼ÆËãÂåÂØ×ȳ£Êý£¬ÐèÒªÓõ½·ÑÃ×»ý·Ö£¬ÇëÎʿɷñÖ¸µãһϣ¿...

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