±±¾©Ê¯ÓÍ»¯¹¤Ñ§Ôº2026ÄêÑо¿ÉúÕÐÉú½ÓÊÕµ÷¼Á¹«¸æ
²é¿´: 958  |  »Ø¸´: 3

perper

Í­³æ (³õÈëÎÄ̳)

[ÇóÖú] matlab³ÌÐò±¨´í£¬Çë´óÉñ°ïæ¸ÄÕý

MÎļþ£º
function f=myfunc(D,t)
syms n t;
x=1/n^2*exp((-1)*D*n^2*pi^2*t/0.0002^2);
s=symsum(x,n,1,100);
f=1-6/pi^2*s;                              
end
Ö÷³ÌÐò£º
  t=[180 420 780 1080 1380 1680 1920 2220 2520 2820 3120 3420 3720 4020 4380 4680 4980 5280];
c=[0.08762 0.20444 0.36545 0.48247 0.59 0.67602 0.75 0.80407 0.86 0.9 0.94 0.96831 0.98561 0.99 0.99968 0.999999 1 1];
D0=[0.001];
D=lsqcurvefit(@myfunc,D0,t,c);
f=myfunc(D,t);
´íÎó£º
Error using lsqcurvefit (line 247)
Function value and YDATA sizes are incommensurate.
ÊÇÏëͨ¹ý·ÇÏßÐÔÄâºÏÇóD¡£ÓÐt,cÊý¾Ý£¬·½³ÌÊÇÒ»¸öÇóºÍ·½³Ì¡£
»Ø¸´´ËÂ¥

» ²ÂÄãϲ»¶

» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:

BIGBOY
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
»ØÌûÖö¥ ( ¹²ÓÐ1¸ö )

xiegangmai

°æÖ÷ (Ö°Òµ×÷¼Ò)

ÎÒûͷÏÎ

ÓÅÐã°æÖ÷ÓÅÐã°æÖ÷ÓÅÐã°æÖ÷

perper: »ØÌûÖö¥ 2014-05-26 18:49:49
Á½¸öÎÊÌ⣺
£¨1£©D0=[0.001];³õʼֵӦÊǶþάµÄÊý×é¡£
£¨2£©myfunc²»ÄÜÓ÷ûºÅº¯Êý¡£
Ã÷µÂºñѧ¡¢ÇóÊÇ´´ÐÂ
2Â¥2014-05-26 17:05:13
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
ÆÕͨ»ØÌû

perper

Í­³æ (³õÈëÎÄ̳)

ÒýÓûØÌû:
2Â¥: Originally posted by xiegangmai at 2014-05-26 17:05:13
Á½¸öÎÊÌ⣺
£¨1£©D0=;³õʼֵӦÊǶþάµÄÊý×é¡£
£¨2£©myfunc²»ÄÜÓ÷ûºÅº¯Êý¡£

¿ÉÊÇÎÒÖ»ÓÐÒ»¸öδ֪ÊýD°¡£¬³õÖµ²»ÊǾÍÒ»¸ö£¿
BIGBOY
3Â¥2014-05-26 18:47:30
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

perper

Í­³æ (³õÈëÎÄ̳)

ÒýÓûØÌû:
2Â¥: Originally posted by xiegangmai at 2014-05-26 17:05:13
Á½¸öÎÊÌ⣺
£¨1£©D0=;³õʼֵӦÊǶþάµÄÊý×é¡£
£¨2£©myfunc²»ÄÜÓ÷ûºÅº¯Êý¡£

¸çÃÇ£¬ºÜ¼±°¡ Çó°ïæ
BIGBOY
4Â¥2014-05-26 18:50:30
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ perper µÄÖ÷Ìâ¸üÐÂ
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] 281Çóµ÷¼Á +7 Ò¬×ÓÄ¢¹½ 2026-04-06 7/350 2026-04-06 09:57 by Sealedwind
[¿¼ÑÐ] ²ÄÁϵ÷¼Á +14 Ò¼·¡·¡ÒÚ 2026-04-04 14/700 2026-04-05 23:31 by À´¿´Á÷ÐÇÓê10
[¿¼ÑÐ] 304Çóµ÷¼Á +7 c297914 2026-04-05 8/400 2026-04-05 22:13 by hemengdong
[¿¼ÑÐ] 081200-11408-276ѧ˶Çóµ÷¼Á +4 ´Þwj 2026-04-05 4/200 2026-04-05 20:29 by à£à£à£0119
[¿¼ÑÐ] 308Çóµ÷¼Á +3 ÖÕ²»ËÆ´Óǰ 2026-04-05 3/150 2026-04-05 20:07 by à£à£à£0119
[¿¼ÑÐ] Ò»Ö¾Ô¸ËÕÖÝ´óѧ²ÄÁϹ¤³Ì£¨085601£©×¨Ë¶ÓпÆÑо­ÀúÈýÏî¹ú½±Á½¸öʵÓÃÐÍרÀûÒ»ÏîÊ¡¼¶Á¢Ïî +10 ´ó»ðɽС»ðɽ 2026-04-05 10/500 2026-04-05 19:58 by СÎÏţСÎÏÅ£
[¿¼ÑÐ] ²ÄÁϵ÷¼Á +13 Ò»ÑùYWY 2026-04-03 14/700 2026-04-05 18:20 by À¶ÔÆË¼Óê
[¿¼ÑÐ] 288Çóµ÷¼Á Ò»Ö¾Ô¸¹þ¹¤´ó ²ÄÁÏÓ뻯¹¤ +13 ÂåÉñ¸ç¸ç 2026-04-03 13/650 2026-04-05 17:27 by zzx2138
[¿¼ÑÐ] 358Çóµ÷¼Á +7 Çïgk 2026-04-04 7/350 2026-04-05 13:29 by huangmoli
[¿¼ÑÐ] 288Çóµ÷¼Á£¬Ò»Ö¾Ô¸»ªÄÏÀí¹¤´óѧ071005 +6 ioodiiij 2026-04-04 6/300 2026-04-05 10:09 by guoweigw
[¿¼ÑÐ] Ò»Ö¾Ô¸»ª±±µçÁ¦´óѧ£¨±±¾©£©£¬²ÄÁÏ¿ÆÑ§Ó빤³Ìѧ˶265£¬Çóµ÷¼Á +11 yelck 2026-04-03 12/600 2026-04-04 19:52 by dongzh2009
[¿¼ÑÐ] 320µ÷¼Á +4 ũҵ¹¤³ÌÓëÐÅÏ¢¼ 2026-04-03 4/200 2026-04-03 21:40 by lbsjt
[¿¼ÑÐ] ²ÄÁÏ¿ÆÑ§Ó빤³Ì339Çóµ÷¼Á +12 hyz0119 2026-03-31 13/650 2026-04-03 18:33 by lsÁõ˧
[¿¼ÑÐ] Ò»Ö¾Ô¸Äϲý´óѧ324Çóµ÷¼Á +13 hanamiko 2026-04-01 13/650 2026-04-03 18:30 by lsÁõ˧
[¿¼ÑÐ] ²ÄÁÏÓ뻯¹¤µ÷¼ÁÒ»Ö¾Ô¸´óÁ¬º£ÊÂ085600£¬349 +11 ³ÔµÄ²»ÉÙ 2026-03-30 11/550 2026-04-03 18:05 by Jimmyandyou
[¿¼ÑÐ] 282Çóµ÷¼Á +5 ºôÎü¶¼ÊǼõ·Ê 2026-03-31 5/250 2026-04-03 12:03 by 1753564080
[¿¼ÑÐ] 262Çóµ÷¼Á +6 ÀøÖ¾Ò»¶¨·¢ÎÄÕ 2026-04-02 7/350 2026-04-03 09:54 by linyelide
[¿¼ÑÐ] µ÷¼Á +7 ìíáº. 2026-04-02 7/350 2026-04-03 09:11 by »¨ß»¹Ç·600
[¿¼ÑÐ] 321Çóµ÷¼Á Ò»Ö¾Ô¸ Õã½­¹¤Òµ´óѧÉúÎïÒ½Ò© +5 ºÙºÙHC 2026-04-01 6/300 2026-04-02 15:23 by sophie2180
[¿¼ÑÐ] 311Çóµ÷¼Á +14 À¶ÔÂÁÁÁÁ 2026-03-30 14/700 2026-04-02 12:18 by 1753564080
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û