±±¾©Ê¯ÓÍ»¯¹¤Ñ§Ôº2026ÄêÑо¿ÉúÕÐÉú½ÓÊÕµ÷¼Á¹«¸æ
²é¿´: 2314  |  »Ø¸´: 4

sunny-apple

Í­³æ (³õÈëÎÄ̳)

[½»Á÷] ¡¾ÇóÖú¡¿MATLABÖжàÏîʽ³ý·¨ÎÊÌâ ÒÑÓÐ1È˲ÎÓë

Çë½Ì¸÷λ£ºMATLABÖУ¬³ÌÐòÈçÏ£º
>> x=[52.2 44.8 28.5 14.9 7.5];
>> y=[-11.7 -10.7 -7.3 -3.9 -2.2];
>> a=polyfit(x,y,2)

a =

    0.0013   -0.2940    0.0369

>> x1=0:0.01:60;
>> y1=a(1)*x1.^2+a(2)*x1+a(3);
>> x2=[49.9 45.7 40.9 35.7 30.5 25.5 19.8 15.3 10.5 5.2];
>> y2=[-5.7 -5.2 -4.6 -4.4 -4.1 -3.1 -3.4 -2.7 -1.5 -0.3];
>> b=polyfit(x2,y2,2)

b =

    0.0015   -0.1906    0.3120

>> y3=b(1)*x1.^2+b(2)*x1+b(3);

>> plot(x,y,'*',x1,y1,'--r',x2,y2,'s',x1,y3,'-b'£©


ÒÑÖª¶àÏîʽy1=a(1)*x1.^2+a(2)*x1+a(3);ºÍy3=b(1)*x1.^2+b(2)*x1+b(3);
ÈçºÎÇó Èç¹û½«ÆäÖ±½ÓÓÃÓÚMATLAB³ÌÐò£¬Ôò½á¹ûΪ¶¨Öµ£¬ÎÊ£ºÔõô²ÅÄܵõ½(y1-y3)/y1 ÇúÏߣ¿
»Ø¸´´ËÂ¥

» ²ÂÄãϲ»¶

» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:

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

lixuke2005

Ìú¸Ëľ³æ (ÖøÃûдÊÖ)

Äã²»ÊÇ»áÄâºÏô£¿
bla
2Â¥2010-09-08 20:34:23
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

sunny-apple

Í­³æ (³õÈëÎÄ̳)

ÒýÓûØÌû:
Originally posted by lixuke2005 at 2010-09-08 20:34:23:
Äã²»ÊÇ»áÄâºÏô£¿

µ«ÊÇÖ±½ÓÌ×È빫ʽ×öµÃµ½µÄÊÇÒ»¸ö¶¨Öµ£¬Ò»ÌõÖ±Ïߣ¬¸Ð¾õ²»¶Ô
3Â¥2010-09-09 09:05:12
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

lixuke2005

Ìú¸Ëľ³æ (ÖøÃûдÊÖ)

sunny-apple(½ð±Ò+5):ллÄã»Ø¸´ÁËÎÒµÄÎÊÌ⣬ËùÒÔÎÒ¾ö¶¨°Ñ±Ò¶¼Ôù¸øÄã 2010-09-13 08:34:06
ÒýÓûØÌû:
Originally posted by sunny-apple at 2010-09-09 09:05:12:


µ«ÊÇÖ±½ÓÌ×È빫ʽ×öµÃµ½µÄÊÇÒ»¸ö¶¨Öµ£¬Ò»ÌõÖ±Ïߣ¬¸Ð¾õ²»¶Ô

ÄÇô¶Ô¸ÃÇúÏßÔÙ´ÎÄâºÏÄØ£¿
bla
4Â¥2010-09-09 12:13:14
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

abingchem

ľ³æ (ÖøÃûдÊÖ)

¡ï
Сľ³æ(½ð±Ò+0.5):¸ø¸öºì°ü£¬Ð»Ð»»ØÌû½»Á÷
ÒýÓûØÌû:
Originally posted by sunny-apple at 2010-09-09 09:05:12:


µ«ÊÇÖ±½ÓÌ×È빫ʽ×öµÃµ½µÄÊÇÒ»¸ö¶¨Öµ£¬Ò»ÌõÖ±Ïߣ¬¸Ð¾õ²»¶Ô

ÊDz»ÊÇ´¦Àí·½·¨ÉϵÄÎÊÌâ¡£

ÄâºÏºóµÄÊý¾ÝÒѾ­²»ÄÜÍêÈ«·´Ó¦Ô­Ê¼Êý¾ÝµÄÌØµãÁË¡£

Èç¹û²ÉÓòåÖµµÄ»°£¬´úÂëÊÇÕâÑùµÄ£º

clc;
clear;
x=[52.2 44.8 28.5 14.9 7.5];
y=[-11.7 -10.7 -7.3 -3.9 -2.2];
xs=5:0.5:50;
y1=spline(x,y,xs);

x2=[49.9 45.7 40.9 35.7 30.5 25.5 19.8 15.3 10.5 5.2];
y2=[-5.7 -5.2 -4.6 -4.4 -4.1 -3.1 -3.4 -2.7 -1.5 -0.3];

y3=spline(x2,y2,xs);

subplot(2,1,1),plot(x,y,'*',xs,y1,'--r',x2,y2,'s',xs,y3,'-b')

subplot(2,1,2),plot(xs,(y1-y3)./y1)

¹Û²ìµÚ¶þÌõÇúÏßÀàËÆÓÚÕñµ´Ë¥¼õº¯Êý£¬Õâ¸öºÃÏñÓ¦¸Ã±È½ÏÊìϤÁ˰É~
±ùÊÇ´Ó×ÀäµÄÄÇÌ쿪ʼÈÚ»¯µÄ
5Â¥2010-12-17 18:27:37
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ sunny-apple µÄÖ÷Ìâ¸üÐÂ
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] 377Çóµ÷¼Á +6 by.ovo 2026-04-05 6/300 2026-04-05 22:18 by dongzh2009
[¿¼ÑÐ] 085602µ÷¼Á ³õÊÔ×Ü·Ö335 +8 19123253302 2026-04-05 8/400 2026-04-05 20:44 by ÄϺ½~ÍòÀÏʦ
[¿¼ÑÐ] 070300»¯Ñ§Ñ§Ë¶311·ÖÇóµ÷¼Á +8 Áº¸»¹óÏÕÖÐÇó 2026-04-04 8/400 2026-04-05 18:01 by Öí»á·É
[¿¼ÑÐ] 295Çóµ÷¼Á +10 xndjjj 2026-04-04 10/500 2026-04-05 11:19 by Öí»á·É
[¿¼ÑÐ] µç×ÓÐÅÏ¢µ÷¼Á½»²æÑ§¿ÆÓÐÍÆ¼öÂð +6 jhtfeybgj 2026-04-01 9/450 2026-04-05 11:13 by Öí»á·É
[¿¼ÑÐ] Ò»Ö¾Ô¸Î÷±±Å©ÁÖÐóÄÁר˶336·ÖÇóµ÷¼Á +3 5ourr 2026-04-03 3/150 2026-04-05 10:40 by JOKER0401
[¿¼ÑÐ] ²ÄÁÏר˶306Ó¢Ò»Êý¶þ +8 z1z2z3879 2026-03-31 8/400 2026-04-04 22:08 by hemengdong
[¿¼ÑÐ] 085701Çóµ÷¼Á +7 ¹¨ÓíÃú 2026-04-04 8/400 2026-04-04 13:49 by ССÊ÷2024
[¿¼ÑÐ] Ò»Ö¾Ô¸±±¾©¿Æ¼¼´óѧ²ÄÁϹ¤³Ì085601£¬Çóµ÷¼Á +17 cdyw 2026-04-02 18/900 2026-04-04 11:14 by w_xuqing
[¿¼ÑÐ] 22408£¬264Çóµ÷¼Á +3 ywh729 2026-04-03 4/200 2026-04-04 11:04 by ywh729
[¿¼ÑÐ] ÊÞÒ½µ÷¼Á +3 wh119216 2026-04-02 3/150 2026-04-03 19:34 by zrongyan
[¿¼ÑÐ] 285Çóµ÷¼Á +6 FZAC123 2026-03-30 6/300 2026-04-03 12:22 by xingguangj
[¿¼ÑÐ] 285Çóµ÷¼Á +7 AZMK 2026-04-02 9/450 2026-04-03 11:12 by wanwan00
[¿¼ÑÐ] ÉúÎïѧ308·ÖÇóµ÷¼Á£¨Ò»Ö¾Ô¸»ª¶«Ê¦´ó£© +6 ÏàÐűػá¹ââÍòÕ 2026-03-31 7/350 2026-04-02 23:16 by JourneyLucky
[¿¼ÑÐ] 296Çóµ÷¼Á +4 sdhu 2026-04-02 4/200 2026-04-02 21:29 by baoball
[¿¼ÑÐ] 081200-11408-276ѧ˶Çóµ÷¼Á +3 ´Þwj 2026-04-02 3/150 2026-04-02 15:06 by cal0306
[¿¼ÑÐ] ²ÄÁÏרҵµ÷¼Á +5 À²À²À²¿Þ 2026-03-31 6/300 2026-04-01 16:48 by JourneyLucky
[¿¼ÑÐ] 0703Ò»Ö¾Ô¸ÄÏʦ´ó334Çóµ÷¼Á +4 seven7yu 2026-03-30 4/200 2026-04-01 16:10 by oooqiao
[¿¼ÑÐ] ¿¼ÑвÄÁϹ¤³Ì351·Öµ÷¼Á +5 Õû¸öºÃµÄ 2026-03-31 5/250 2026-04-01 09:36 by topgun2009
[¿¼ÑÐ] ±§Ç¸ +3 ÌïºéÓÐ 2026-03-30 3/150 2026-03-30 19:11 by ÃÔºýCCPs
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û