²é¿´: 2665  |  »Ø¸´: 3
µ±Ç°Ö»ÏÔʾÂú×ãÖ¸¶¨Ìõ¼þµÄ»ØÌû£¬µã»÷ÕâÀï²é¿´±¾»°ÌâµÄËùÓлØÌû

QiChyi

Òø³æ (³õÈëÎÄ̳)

[ÇóÖú] ÇóÖúMatlab lsqcurveº¯ÊýÇúÏßÄâºÏ

±¾È˱àдһ¸öÀûÓÃlsqcurvefitº¯ÊýÄâºÏÇúÏߵĺ¯Êý£¬´úÂëÈçÏ£º
×ÜÊÇÌáʾ´íÎó£ºOptimization terminated: norm of the current step is less than OPTIONS.TolX.
²»ÏþµÃÊÇÔõô»ØÊ£¬ÇëÇó¸ßÈËÖ¸µã£¡£¨×¢£ºÓÉÓÚÖÖÖÖÔ­Òò£¬½öÄÜÓÃMatlab±à³Ì£¬ÆäËûÈí¼þ²»²ÉÓã©
w=2*pi*[0.00099 0.001 0.002 0.004 0.010 0.021544 0.0464 0.100 0.2154 0.4641 1 2.154 4.64 10 20 40 70 110 222 446 1000];
ydata=[5.5981 5.5924 5.3308 5.2180 5.1315 5.0785 5.0289 5 5.1115 5.0825 5.0579 5.0401 5.0175 5.0271 5.0151 5.005 5.0002 4.9950 4.9906 4.9862 4.9875];
ep0=[3.3 0.1 -4.8 4 7e-4 5e-11 0.68 0.78 5];

ept=inline('ep(1)*w.^(-ep(2))+real(ep(3)./(1+(j*w*ep(5)).^(1-ep(7)))+ep(4)./(1+(j*w*ep(6)).^(1-ep(8))))+ep(9)','ep','w');
ep=lsqcurvefit(ept,ep0,w,ydata);
»Ø¸´´ËÂ¥

» ²ÂÄãϲ»¶

» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:

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

mycastle

Òø³æ (ÕýʽдÊÖ)

ÒýÓûØÌû:
3Â¥: Originally posted by mycastle at 2011-09-08 00:40:23:
¿ÉÒÔÊäÈëoptimsetÃüÁî
ÉèÖÃX toleranceÏĬÈϵÄÊÇ1.0e-6

»òÕß°ÉÄǸö²ÂÖµ¸ÄµÄ´óÒ»µãÊÔÊÔ¡£

²»ºÃÒâ˼£¬´ò´íÁË

¿ÉÒÔÊäÈëoptimtoolÃüÁî
ÉèÖÃX toleranceÏĬÈϵÄÊÇ1.0e-6

»òÕß°ÉÄǸö²ÂÖµ¸ÄµÄ´óÒ»µãÊÔÊÔ
Ï£ÑÔ×ÔÈ»~
4Â¥2011-09-08 00:42:28
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
²é¿´È«²¿ 4 ¸ö»Ø´ð

mycastle

Òø³æ (ÕýʽдÊÖ)

¡ï
jjdg(½ð±Ò+1): ¸Ðл²ÎÓë 2011-09-08 09:59:52
¿ÉÄÜÊÇOPTIONS.TolXµÄÖµµÄÔ­Òò°É.
TolX - Termination tolerance on X [ positive scalar ]
ÊDz»ÊÇep0ÖеIJÂÖµ5e-11Ñ¡µÃ²»ºÏÊÊ£¿
Ï£ÑÔ×ÔÈ»~
2Â¥2011-09-08 00:35:23
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

mycastle

Òø³æ (ÕýʽдÊÖ)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¡ï
jjdg(½ð±Ò+1): ¸Ðл²ÎÓë 2011-09-08 09:59:59
QiChyi(½ð±Ò+5): лл mycastle£¬ÔÙ³¢ÊÔÒ»¹þ 2011-09-08 10:16:24
¿ÉÒÔÊäÈëoptimsetÃüÁî
ÉèÖÃX toleranceÏĬÈϵÄÊÇ1.0e-6

»òÕß°ÉÄǸö²ÂÖµ¸ÄµÄ´óÒ»µãÊÔÊÔ¡£
Ï£ÑÔ×ÔÈ»~
3Â¥2011-09-08 00:40:23
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] 294Çóµ÷¼Á²ÄÁÏÓ뻯¹¤×¨Ë¶ +5 ݤÎÉ­ÁÖ 2026-03-18 5/250 2026-03-18 22:18 by bingxueer79
[¿¼ÑÐ] ²ÄÁÏר˶ӢһÊý¶þ306 +4 z1z2z3879 2026-03-18 4/200 2026-03-18 20:00 by ˜B¸ç
[¿¼ÑÐ] 295Çóµ÷¼Á +3 Ò»Ö¾Ô¸¾©Çø211 2026-03-18 5/250 2026-03-18 17:03 by zhaoqian0518
[¿¼ÑÐ] 286Çóµ÷¼Á +6 lemonzzn 2026-03-16 9/450 2026-03-18 15:31 by vgtyfty
[¿¼ÑÐ] 085601²ÄÁϹ¤³Ìר˶Çóµ÷¼Á +6 Ľº®mio 2026-03-16 6/300 2026-03-18 14:26 by 007_lilei
[¿¼ÑÐ] 0703»¯Ñ§Çóµ÷¼Á ×Ü·Ö331 +3 ZY-05 2026-03-13 3/150 2026-03-18 10:58 by macy2011
[¿¼ÑÐ] ÉúÎïѧ071000 329·ÖÇóµ÷¼Á +3 ÎÒ°®ÉúÎïÉúÎﰮΠ2026-03-17 3/150 2026-03-18 10:12 by macy2011
[¿¼ÑÐ] ¿¼Ñл¯Ñ§Ñ§Ë¶µ÷¼Á£¬Ò»Ö¾Ô¸985 +4 ÕÅvvvv 2026-03-15 6/300 2026-03-17 17:15 by ruiyingmiao
[¿¼ÑÐ] 290Çóµ÷¼Á +3 p asserby. 2026-03-15 4/200 2026-03-17 16:35 by wangkm
[¿¼ÑÐ] 275Çóµ÷¼Á +4 Ì«Ñô»¨ÌìÌ쿪ÐÄ 2026-03-16 4/200 2026-03-17 10:53 by ¹¦·ò·è¿ñ
[¿¼ÑÐ] ¿¼Ñе÷¼Á +3 ä¿ya_~ 2026-03-17 5/250 2026-03-17 09:25 by Winj1e
[¿¼ÑÐ] 326Çóµ÷¼Á +4 ŵ±´¶û»¯Ñ§½±êéê 2026-03-15 7/350 2026-03-16 17:11 by ŵ±´¶û»¯Ñ§½±êéê
[¿¼ÑÐ] Ò»Ö¾Ô¸211 0703·½Ïò310·ÖÇóµ÷¼Á +3 ŬÁ¦·Ü¶·112 2026-03-15 3/150 2026-03-16 16:44 by houyaoxu
[¿¼ÑÐ] 070300»¯Ñ§Ñ§Ë¶Çóµ÷¼Á +6 Ì«Ïë½ø²½ÁË0608 2026-03-16 6/300 2026-03-16 16:13 by kykm678
[¿¼ÑÐ] ²ÄÁÏÓ뻯¹¤ 323 Ó¢Ò»+Êý¶þ+Îﻯ£¬Ò»Ö¾Ô¸£º¹þ¹¤´ó ±¾È˱¾¿ÆË«Ò»Á÷ +4 ×ÔÓɵÄ_·ÉÏè 2026-03-13 5/250 2026-03-14 19:39 by hmn_wj
[¿¼ÑÐ] ¸´ÊÔµ÷¼Á +3 ºôºô£¿~+123456 2026-03-14 3/150 2026-03-14 16:53 by WTUChen
[¿¼ÑÐ] 297Çóµ÷¼Á +4 ѧº£Æ¯²´ 2026-03-13 4/200 2026-03-14 11:51 by ÈÈÇéɳĮ
[¿¼ÑÐ] 290Çóµ÷¼Á +7 ADT 2026-03-12 7/350 2026-03-13 15:17 by JourneyLucky
[¿¼ÑÐ] 070303Ò»Ö¾Ô¸Î÷±±´óѧѧ˶310ÕÒµ÷¼Á +3 dÈçÔ¸Éϰ¶ 2026-03-13 3/150 2026-03-13 10:43 by houyaoxu
[¿¼ÑÐ] 333Çóµ÷¼Á +3 152697 2026-03-12 4/200 2026-03-13 07:08 by Iveryant
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û