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watent

Òø³æ (СÓÐÃûÆø)

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ÒýÓûØÌû:
7Â¥: Originally posted by nagami at 2015-12-05 09:56:35
sin(ax)¹ØÓÚaÇóµ¼Á½´ÎÓеÈʽ£º-D^2{sin(ax)}={x^2*sin(ax)}
ÏȼÆËãexp(-p^2*x^2)*sin(ax),²é±íÓнâÎö½â£¬Çó³öºó¶Ô²ÎÊýaÇóµ¼2´Î£¬¾ÍÊÇÏÖÔÚÒªÇóµÃ»ý·Ö

²»Ì«¶®£¬»¹ÊÇлÁË£¬ÓöþÂ¥µÄ´ð°¸ÁË
11Â¥2015-12-05 10:25:38
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wurongjun

ר¼Ò¹ËÎÊ (Ö°Òµ×÷¼Ò)

ÒýÓûØÌû:
10Â¥: Originally posted by watent at 2015-12-05 10:22:37
³¬¼¸ºÎº¯ÊýµÄ»°£¬ÎÒ×Ô¼ºÕÒÕÒ¿´°É£¬
ÄãÕâ¸ö»ý·ÖÓÃʲôÈí¼þÇóµÄ°¡£¿
·Ö¶¼¸øÄãÀ²¡£...

Matlab!
ÉÆ¶ñµ½Í·ÖÕÓб¨,È˼äÕýµÀÊDz×É£.
12Â¥2015-12-05 10:51:46
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

wurongjun

ר¼Ò¹ËÎÊ (Ö°Òµ×÷¼Ò)

ÒýÓûØÌû:
10Â¥: Originally posted by watent at 2015-12-05 10:22:37
³¬¼¸ºÎº¯ÊýµÄ»°£¬ÎÒ×Ô¼ºÕÒÕÒ¿´°É£¬
ÄãÕâ¸ö»ý·ÖÓÃʲôÈí¼þÇóµÄ°¡£¿
·Ö¶¼¸øÄãÀ²¡£...

Matlab!
>> syms x p a
>> int(x^2*exp(-x^2*p^2)*sin(a*x),x,0,inf)

ans =

1/2/p^4*a*hypergeom([2],[3/2],-1/4*a^2/p^2)
ÉÆ¶ñµ½Í·ÖÕÓб¨,È˼äÕýµÀÊDz×É£.
13Â¥2015-12-05 10:54:17
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ watent µÄÖ÷Ìâ¸üÐÂ
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