±±¾©Ê¯ÓÍ»¯¹¤Ñ§Ôº2026ÄêÑо¿ÉúÕÐÉú½ÓÊÕµ÷¼Á¹«¸æ
²é¿´: 287  |  »Ø¸´: 2

zest1979

Òø³æ (СÓÐÃûÆø)

[ÇóÖú] ÇóÖú£¬Íò·Ö¸Ðл

ÇóÈçϺ¯Êý¶ÔsµÄ»ý·Ö£º0.5*epsi2.*((1+s*epsi2).^2.*(1+s*epsi1)).^-0.5*1./(1+s*epsi2)£¬»ý·ÖÇø¼äÔÚ0µ½ÎÞÇîÖ®¼ä¡£
epsi1ºÍepsi2ÊÇÒ»¸öºÍsÎ޹صÄÁ¿¡£
ÎÒ×Ô¼ºÓÃmatlabÊÔ¹ýÁË£¬ÌáʾΪ£ºExplicit integral could not be found¡£ÓÐÄÄλ´óÏÀÄܰïæһÏÂ
»Ø¸´´ËÂ¥

» ²ÂÄãϲ»¶

» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:

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

zest1979

Òø³æ (СÓÐÃûÆø)

ûÈËÄÜÖ¸µ¼Ò»ÏÂÂð
2Â¥2013-04-25 12:56:04
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

phykid

ľ³æ (ÕýʽдÊÖ)

ÒÔÏÂÄÚÈÝÀ´×Ômatlab˵Ã÷Îĵµ£º


If int cannot compute a closed form of anintegral, it issues a warning and returns an unresolved integral:
syms x
F = sin(sinh(x));
int(F, x)Warning: Explicit integral could not be found.

ans =
int(sin(sinh(x)), x)
If int cannot compute a closed form of anindefinite integral, try to approximate the expression around somepoint using taylor, and thencompute the integral. For example, approximate the expression around x =0:
int(taylor(F, x, 'ExpansionPoint', 0, 'Order', 10), x)ans =
x^10/56700 - x^8/720 - x^6/90 + x^2/2


Compute this definite integral:
syms x
F = int(cos(x)/sqrt(1 + x^2), x, 0, 10)Warning: Explicit integral could not be found.

F =
int(cos(x)/(x^2 + 1)^(1/2), x == 0..10)
If int cannot compute a closed form of adefinite integral, try approximating that integral numerically using vpa. For example, approximate F with5 significant digits:
vpa(F, 5)ans =
0.37571
3Â¥2013-04-26 10:09:10
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ zest1979 µÄÖ÷Ìâ¸üÐÂ
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] 283·ÖÇóµ÷¼Á +10 ÊÔÊÔ¿´ß 2026-04-04 10/500 2026-04-06 23:08 by chenzhimin
[¿¼ÑÐ] 327¿¼Ñе÷¼ÁÍÆ¼ö +6 ÎØÎØÎØÎØÄØ 2026-04-06 6/300 2026-04-06 21:39 by à£à£à£0119
[¿¼ÑÐ] 304Çóµ÷¼Á +4 luoye0105 2026-04-05 4/200 2026-04-06 21:05 by ľ×Ó¾ý1218
[¿¼ÑÐ] 26×ÔÈ»µØÀíѧ303·ÖÇóµ÷¼Á +4 Ò»Õ½³É˶°¡°¡°¡° 2026-04-06 9/450 2026-04-06 20:35 by lin-da
[¿¼ÑÐ] 071000ÉúÎïѧµ÷¼Á +7 À­ÌáÌÒ 2026-04-06 7/350 2026-04-06 18:55 by 52305043001
[¿¼ÑÐ] 346·ÖµÄÉúÎïÓëÒ½Ò©08600Çóµ÷¼Á +6 ³£ÓêÑôÉϰ¶ 2026-04-05 7/350 2026-04-06 12:36 by lys0704
[¿¼ÑÐ] ¹¤¿Æ370Çóµ÷¼Á +3 äçÐļ弦µ° 2026-04-05 3/150 2026-04-06 10:55 by ÕâÊÇÒ»¸öÎÞÁĵÄê
[¿¼ÑÐ] 085500»úеר˶³õÊÔ288Çóµ÷¼Á +3 GZJguo666- 2026-04-05 3/150 2026-04-05 18:06 by jkddd
[¿¼ÑÐ] 353Çóµ÷¼Á +10 MayUxw1 2026-04-03 10/500 2026-04-05 09:23 by Î޼ʵIJÝÔ­
[¿¼ÑÐ] 083200 333Çóµ÷¼Á +3 Ê®¶þ£¡£¡ 2026-04-04 3/150 2026-04-05 08:28 by barlinike
[¿¼ÑÐ] 323Çóµ÷¼Á +8 Àî¼ÑÀÖ1 2026-04-04 8/400 2026-04-04 22:26 by hemengdong
[¿¼ÑÐ] 0854Çóµ÷¼Á +4 assdll 2026-04-03 4/200 2026-04-04 22:17 by hemengdong
[¿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] 11408 Ò»Ö¾Ô¸Î÷µç£¬277·ÖÇóµ÷¼Á +4 zhouzhen654 2026-04-03 4/200 2026-04-04 18:10 by Öí»á·É
[¿¼ÑÐ] ±¾9Ò»Ö¾Ô¸2 0854µÍ·Öר˶286Çóµ÷¼Á +9 âÖÖ111 2026-04-04 9/450 2026-04-04 11:01 by tangruihua
[¿¼ÑÐ] 320Çóµ÷¼Á +5 Õñ¡ªTZ 2026-04-02 5/250 2026-04-03 14:42 by fxue1114
[¿¼ÑÐ] ר˶085601Çóµ÷¼Á +7 suyifei 2026-04-03 8/400 2026-04-03 14:00 by ÐÀϲ777
[¿¼ÑÐ] ²ÄÁÏר˶322·Ö +11 ¹þ¹þ¹þºðºðºð¹þ 2026-04-01 11/550 2026-04-02 10:52 by lnilvy
[¿¼ÑÐ] Ò»Ö¾Ô¸9³õÊÔ366 ±¾Ë«·ÇÇóµ÷¼Á +4 ÔËÆøÀ´µÃÈôÓÐËÆÎ 2026-04-02 4/200 2026-04-02 09:56 by guanxin1001
[¿¼ÑÐ] ¿¼Ñе÷¼ÁÇóÖú +7 13287130938 2026-03-31 7/350 2026-03-31 16:39 by 690616278
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û