²é¿´: 2717  |  »Ø¸´: 1
±¾Ìû²úÉú 1 ¸ö ²©Ñ§EPI £¬µã»÷ÕâÀï½øÐв鿴

meiyangyang

ľ³æ (ÕýʽдÊÖ)


[½»Á÷] ÓÃmatlab¶Ô¶àÏîʽº¯ÊýÇóµ¼

ÈçÏ£º
>> syms t
>> diff(-0.000000000216555 *t.^6+0.000000010399552 *t.^5+0.000001037995352 *t.^4-0.000080553437172 *t.^3+0.001572861417838 *t.^2+0.007249825838703 *t+0.103323003228512,'t',1)

ans =

-25132697363198019/19342813113834066795298816*t^5+15715358656531195/302231454903657293676544*t^4+4901794459659279/1180591620717411303424*t^3-17831383677234309/73786976294838206464*t^2+3626771504783691/1152921504606846976*t+8358480114095059/1152921504606846976

ÕâÀït^5£¬t^4¡­¡­µÄϵÊýΪºÎÊÇaaaa/bbbbbbµÄÐÎʽ£¿ÕâЩaaaa/bbbbbbÐÎʽµÄÊý¾Ý¾ßÌå±íʾʲô£¿
ËùÇóµÄ¶àÏîʽº¯ÊýµÄµ¼ÊýÓ¦µ±ÊÇ-0.000000001299330 *t.^5+0.000000051997760 *t.^4+0.000004151981408 *t.^3-0.000241660311516 *t.^2+0.003145722835676 *t+0.007249825838703
£¬Ó¦µ±ÈçºÎÓÃMatlabµÃµ½Õâ¸öÐÎʽµÄ½á¹û£¿

ÁíÍ⣬»¹Ï£ÍûµÃµ½¶àÏîʽº¯ÊýµÄ¶þ½×µ¼Êý£¬Ó¦µ±ÈçºÎ²Ù×÷²ÅÄܵõ½ÐÎÈç-0.000000006496650  *t.^4+0.000000207991040 *t.^3+0.000012455944224  *t.^2-0.000483320623032 *t+0.003145722835676µÄÕýÈ·´ð°¸£¿

ÎÒÊÇmatlabµÄ³õѧÕߣ¬ÎÊÌâ´Ödz£¬»¹Íû¸÷λǰ±²²»Áߴͽ̣¡

» ²ÂÄãϲ»¶

» ÇÀ½ð±ÒÀ²£¡»ØÌû¾Í¿ÉÒԵõ½:

²é¿´È«²¿É¢½ðÌù

ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

leedobb

½ð³æ (ÕýʽдÊÖ)


meiyangyang(½ð±Ò+10, ²©Ñ§EPI+1): Äã¸øµÄ·½·¨Ëƺõ²»¿ÉÐС£Õâ¸öÎÊÌâÒѽâ¾ö£¬ÓÃformat long£¬polyder()¡£Ð»Ð»ÄãµÄ²ÎÓë¡£ 2011-02-18 19:11:43
Äã¿ÉÒÔÕâÑùд
>>df=diff(-0.000000000216555 *t.^6+0.000000010399552 *t.^5+0.000001037995352 *t.^4-0.000080553437172 *t.^3+0.001572861417838 *t.^2+0.007249825838703 *t+0.103323003228512,'t',1)
>>vpa(df)

¾Í¿ÉÒԵõ½ÄãÏëÒªµÄ½á¹û£¬
²»ÓÃл
2Â¥2011-02-17 11:26:38
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ meiyangyang µÄÖ÷Ìâ¸üÐÂ
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] 326Çóµ÷¼Á +3 ŵ±´¶û»¯Ñ§½±êéê 2026-03-15 3/150 2026-03-16 13:51 by houyaoxu
[˶²©¼ÒÔ°] ÉîÛÚ´óѧ˶ʿÕÐÉú£¨2026Ç´«¸ÐÆ÷·½Ïò£¬½ö¼ȡµÚÒ»Ö¾Ô¸£© +4 xujiaoszu 2026-03-11 8/400 2026-03-16 09:45 by xujiaoszu
[¿¼ÑÐ] 344Çóµ÷¼Á +3 knight344 2026-03-16 3/150 2026-03-16 09:42 by Î޼ʵIJÝÔ­
[¿¼ÑÐ] 321Çóµ÷¼Á +4 ´óÃ×·¹£¡ 2026-03-15 4/200 2026-03-16 08:41 by Linda Hu
[¿¼ÑÐ] ²ÄÁϹ¤³Ìר˶274Ò»Ö¾Ô¸211Çóµ÷¼Á +5 Ñ¦ÔÆÅô 2026-03-15 5/250 2026-03-15 20:38 by Logic2024
[¿¼²©] ¶«»ªÀí¹¤´óѧ»¯²Äרҵ26½ì˶ʿ²©Ê¿ÉêÇë +6 zlingli 2026-03-13 6/300 2026-03-15 20:00 by ryzcf
[¿¼ÑÐ] 288Çóµ÷¼Á +4 Ææµã0314 2026-03-14 4/200 2026-03-14 23:04 by JourneyLucky
[¿¼ÑÐ] ²ÄÁϹ¤³Ì327Çóµ÷¼Á +3 xiaohe12w 2026-03-11 3/150 2026-03-14 20:20 by ms629
[¿¼ÑÐ] ²ÄÁÏ080500µ÷¼ÁÇóÊÕÁô +3 Ò»¿Åmeteor 2026-03-13 3/150 2026-03-14 10:54 by peike
[¿¼ÑÐ] µ÷¼Á +3 13853210211 2026-03-10 3/150 2026-03-14 00:47 by JourneyLucky
[¿¼ÑÐ] 308Çóµ÷¼Á +3 ÊÇLupa°¡ 2026-03-10 3/150 2026-03-14 00:30 by JourneyLucky
[¿¼ÑÐ] ²ÄÁϹ¤³Ìµ÷¼Á +9 ßäßä¿Õ¿Õ 2026-03-12 9/450 2026-03-13 22:05 by ÐÇ¿ÕÐÇÔÂ
[¿¼ÑÐ] 0703»¯Ñ§Ò»Ö¾Ô¸211 ×Ü·Ö320Çóµ÷¼Á +5 Â꿨°Í¿¨°¡¹þ 2026-03-11 5/250 2026-03-13 21:40 by JourneyLucky
[¿¼ÑÐ] 301Çóµ÷¼Á +6 Liyouyumairs 2026-03-11 6/300 2026-03-13 20:11 by JourneyLucky
[¿¼ÑÐ] Ò»Ö¾Ô¸211»¯Ñ§Ñ§Ë¶310·ÖÇóµ÷¼Á +8 ŬÁ¦·Ü¶·112 2026-03-12 9/450 2026-03-13 15:41 by JourneyLucky
[¿¼ÑÐ] »¯¹¤Ñ§Ë¶306Çóµ÷¼Á +9 42838695 2026-03-12 9/450 2026-03-13 10:16 by houyaoxu
[¿¼ÑÐ] 321Çóµ÷¼Á£¨Ê³Æ·/ר˶£© +3 xc321 2026-03-12 6/300 2026-03-13 08:45 by xc321
[¿¼²©] 26¶Á²© +4 Rui135246 2026-03-12 10/500 2026-03-13 07:15 by gaobiao
[¿¼ÑÐ] ¹þ¹¤´ó²ÄÁÏ324Çóµ÷¼Á +6 ãÆÐñ¶« 2026-03-10 8/400 2026-03-10 22:49 by ÐÇ¿ÕÐÇÔÂ
[¿¼²©] 26É격ÇóÖú +3 ÌøÔ¾±ý¸É 2026-03-10 4/200 2026-03-10 21:15 by Tntcnn
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û