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walk1997

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Äã¶ÔBesselJ °ïÖúÏ ÔÚÏÂÃæ¾ÍÄÜ¿´µ½Ïà¹ØµÄº¯Êý
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Table[BesselJZero[1, i], {i, 1, 10}] // N
½á¹û
{3.83171, 7.01559, 10.1735, 13.3237, 16.4706, 19.6159, 22.7601, \
25.9037, 29.0468, 32.1897}
2Â¥2014-03-27 06:17:06
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frostkid

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ÒýÓûØÌû:
2Â¥: Originally posted by walk1997 at 2014-03-27 06:17:06
MathematicaÄÚ²¿ÓÐÖ±½ÓµÄº¯ÊýÇóÕâ¸öÁãµãλÖà ²»ÓÃ×Ô¼ºÇó½â
Äã¶ÔBesselJ °ïÖúÏ ÔÚÏÂÃæ¾ÍÄÜ¿´µ½Ïà¹ØµÄº¯Êý
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Table // N
½á¹û
{3.83171, 7.01559, 10.1735, 13.3237, 16.4706, 19.6159, 22.7601, \
25.9037 ...

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BesselJZero[1, Range[20]] // N
ÎÒÓõÄÊÇÉÏÃæÕâ¸ö´úÂë..
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3Â¥2014-03-27 10:20:14
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walk1997

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Сľ³æ: ½ð±Ò+0.5, ¸ø¸öºì°ü£¬Ð»Ð»»ØÌû
ÒýÓûØÌû:
3Â¥: Originally posted by frostkid at 2014-03-27 10:20:14
àÅ £¬Ð»Ð»À²~
BesselJZero // N
ÎÒÓõÄÊÇÉÏÃæÕâ¸ö´úÂë..
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t1 = BesselJZero[1, Range[20]] // N
t2 = Map[NIntegrate[x*BesselJ[1, x], {x, #, 3 #}] &, t1]
t2 // Total

Map ²»ÊìϤµÄ»° Ò²¿ÉÒÔÖ±½ÓËã

Table[NIntegrate[
   x*BesselJ[1, x], {x, BesselJZero[1, i], 3 BesselJZero[1, i]}], {i,
   1, 20}] // Total

» ±¾ÌûÒÑ»ñµÃµÄºì»¨£¨×îÐÂ10¶ä£©

4Â¥2014-03-28 07:31:29
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frostkid

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Ëͺ컨һ¶ä
ÒýÓûØÌû:
4Â¥: Originally posted by walk1997 at 2014-03-28 07:31:29
t1 = BesselJZero // N
t2 = Map[NIntegrate &, t1]
t2 // Total

Map ²»ÊìϤµÄ»° Ò²¿ÉÒÔÖ±½ÓËã

Table[NIntegrate, {i,
   1, 20}] // Total...

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5Â¥2014-03-28 16:34:12
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walk1997

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Сľ³æ: ½ð±Ò+0.5, ¸ø¸öºì°ü£¬Ð»Ð»»ØÌû
ÒýÓûØÌû:
5Â¥: Originally posted by frostkid at 2014-03-28 16:34:12
ʵÔÚÊÇ̫ллÄãÁË¡£ÏÊ»¨ËÍÉÏ~
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6Â¥2014-03-28 16:48:40
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frostkid

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7Â¥2014-03-29 19:16:48
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Сľ³æ: ½ð±Ò+0.5, ¸ø¸öºì°ü£¬Ð»Ð»»ØÌû
ÒýÓûØÌû:
3Â¥: Originally posted by frostkid at 2014-03-27 10:20:14
àÅ £¬Ð»Ð»À²~
BesselJZero // N
ÎÒÓõÄÊÇÉÏÃæÕâ¸ö´úÂë..
ÄãºÃ ÄÜÔÙÇë½ÌÄãÒ»¸öÎÊÌâô£¬ÎÒÇó³öÁËǰ20¸ö½âµÄ½â¼¯£¬ÏÂÒ»²½ÎÒÏë½øÐÐÇóºÍÔËË㣬ÈçÏÂͼËùʾ£¬Ê½ÖÐxi¾ÍÊÇËùÇóµÄ½â¼¯ÖеĽ⣨i´Ó1µ½20£©£¬ÇëÎÊÔõô´úÈëÄØ£¬ ...

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