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logyquanÒø³æ (СÓÐÃûÆø)
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ÎÒÏëÇó·ÇÏßÐÔ·½³Ì×é df1=diff(F, x(1))=0 df2=diff(F, x(2))=0 ÒԵõ½x(1)£¬x(2)µÄ½â ÓÃÏÂÃæµÄ³ÌÐò£¬´íÔÚÄÄÄØ£¬Ð»Ð»¸ßÈËÖ¸µã d1=560 d2=4500 p=40000 h1=12 h2=10 h0=3 s1=240 s2=600 sp=5500 s01=320 s02=1000 d0=d1+d2 syms x(1) x(2); F=(sp+(s01+s1)* x(1)+(s02+s2)* x(2))*((( x(1)-1)*h0+h1)*d1/(x(1)*d0)+(( x(2)-1)*h0+h2)*d2/(x(2)*d0)-( x(1)-2)*d1*h0/(x(1)*p)-( x(2)-2)*d2*h0/(x(2)*p)) df1=diff(F, x(1)) df2=diff(F, x(2)) fun=inline('df1,df2', 'x'); x0=[1;1]; x=fsolve('fun',x0) |
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flyinuniverse58
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Сľ³æ(½ð±Ò+0.5):¸ø¸öºì°ü£¬Ð»Ð»»ØÌû½»Á÷
adu886886(½ð±Ò+1):3k u 2010-06-03 14:07:37
Сľ³æ(½ð±Ò+0.5):¸ø¸öºì°ü£¬Ð»Ð»»ØÌû½»Á÷
adu886886(½ð±Ò+1):3k u 2010-06-03 14:07:37
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I think the problem is the misusing of 'syms'. 'Syms' doesn't support the variable parameter array. You could try to change all the x(1), x(2) to x1, x2. If you want to use variable parameter as array, you can try another software, name is 1stopt. |
2Â¥2010-06-03 05:55:30
flyinuniverse58
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zzuwangshilei:¿ÉÒÔÉèÖÃÇøÓòÓïÑÔÑ¡Ïî 2010-06-03 09:47:18
| I am very sorry that my computer cannot input Chinese, because this is the office computer. |
3Â¥2010-06-03 05:56:24
zzuwangshilei
ľ³æ (ÕýʽдÊÖ)
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adu886886(½ð±Ò+1):ÐÁ¿àÁË 2010-06-03 14:07:20
Сľ³æ(½ð±Ò+0.5):¸ø¸öºì°ü£¬Ð»Ð»»ØÌû½»Á÷
adu886886(½ð±Ò+1):ÐÁ¿àÁË 2010-06-03 14:07:20
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°ïÂ¥Ö÷·Ò»Ï£º ÎÒÈÏΪÎÊÌâÔÚÓÚÎÞ·¨Ê¹ÓÃ'syms'. 'syms'²»Ö§³Ö±äÁ¿²ÎÊý¾ØÕó. ÄãÓ¦µ±ÊÔ׎«X£¨1£©£¬x(2)¸ÄΪX1£¬X2£¬¿´ÊÇ·ñ¿ÉÐС£ ÆäËû·½·¨ÊÇ£¬Ê¹ÓÃÆäËûµÄÈí¼þ1stopt. |
4Â¥2010-06-03 09:52:03
logyquan
Òø³æ (СÓÐÃûÆø)
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zzuwangshilei:¹ÄÀøÌÖÂÛ 2010-06-05 10:48:05
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ÄãºÃ£¬Ð»Ð»£¬ÎÊÌâÊÇÔÚÕâÀµ«ÊÇfsolveÃüÁîÀfunº¯ÊýÖÐxÒªÊÇÏòÁ¿µÄÐÎʽ£¬²»ÖªµÀÔõô´¦Àí [ Last edited by logyquan on 2010-6-4 at 13:06 ] |
5Â¥2010-06-04 13:05:18
logyquan
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6Â¥2010-06-04 13:07:35
logyquan
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7Â¥2010-06-04 13:11:28
flyinuniverse58
ľ³æ (ÕýʽдÊÖ)
- Ó¦Öú: 3 (Ó×¶ùÔ°)
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zzuwangshilei(½ð±Ò+1):¶àлÌṩ½¨Òé 2010-06-05 10:49:21
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zzuwangshilei(½ð±Ò+1):¶àлÌṩ½¨Òé 2010-06-05 10:49:21
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Äã¿ÉÒÔÓÃ1stopt»òÕßÊÇmathematicaÊÔÊÔ£¬Ó¦¸Ã¿ÉÒԵġ£ Èç¹û·ÇÒªÓÃmatlab£¬¿ÉÒÔ³¢ÊÔ°ÑFд³ÉfunctionµÄÐÎʽ£¬Ç󵼺óÔÙÁ¬Á¢Çó·½³Ì×éµÄ½â¡£³ÌÐòÄã×Ô¼º±à±à°É£¬Ó¦¸Ã²»Äѵġ£ ¿ÉÒÔÏÈÓüòµ¥µÄº¯ÊýÊÔÊÔ£¬¿´¿´Äĸö·½·¨ÐУ¬³É¹¦ÁËÔÙ»»ÉÏÕæÕýµÄº¯Êý¡£ |
8Â¥2010-06-05 09:01:06
logyquan
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9Â¥2010-06-05 23:11:29
billduke
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10Â¥2010-06-07 10:13:56













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