24СʱÈÈÃŰæ¿éÅÅÐаñ    

²é¿´: 2771  |  »Ø¸´: 29

ÖÕ̫֮µ¶¡ªÏþ

Ìú¸Ëľ³æ (ÖøÃûдÊÖ)

Êýѧ°®ºÃÕß

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
²»ÊDzåÖµ£¬ÔÚÒ»°ãµÄÊýÖµ·ÖÎöÊéÉÏ£¬ÓйØÓÚÊýÖµ»ý·ÖµÄÕ½ڣ¬½éÉÜÕâЩ·½·¨µÄ¡£
PreferenceforMathematics
11Â¥2014-11-03 01:19:54
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

nagami

ľ³æ (ÕýʽдÊÖ)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
Óм¸ÖÖÊÔÊÔ
1.²é»ý·ÖÊÖ²á
2.ÓÐÀíʽչ¿ªÃݼ¶Êý£¬½»´í¼¶ÊýÊÕÁ²Âý£¬gaussº¯ÊýÓëż´ÎÃݺ¯Êý»ý·Ö¹«Ê½ÒÑÖª£¬»¯³É·â±Õ¹«Ê½Âé·³¡£
3.°ÑԭʽkËõÈëxÖУ¬gaussº¯ÊýÀïÃæÒòʽ·Ö½â¡£
¶Ôgaussº¯Êý×öexp(-ikx)Õ¹¿ª¸µÁ¢Ò¶»ý·ÖÌæ»»³ÉÒ»¸öË«ÖØ»ý·Ö¡£ÕâÀï¹ØÓÚk²»Êǹ«Ê½ÖеÄk
³öÏÖdkdxµÄÖØ»ý·Ö£¬¶ÔÐÎÈç1/(1+x*x)exp£¨-ikx£©dx×öÄÚ²ãfourier±ä»»»ý·Ö£¬²é±íÊÇÒ»¸öexpµÄº¯Êý£¬
ÔÙ¶Ôdk×ö»ý·Ö¡£¶¼ÊÇÊìϤµÄ¹«Ê½£¬²é±í¾ÍÓС£Ô­gaussº¯ÊýÓиöÆ½ÒÆ¡£Êµ¼Ê¼ÆËã¿ÉÄÜÓв»Í¬£¬·½·¨Ò»Ñù
ÕâÑùÒ²Ðí¾ÍµÃµ½·â±Õ¹«Ê½¡£×îºó¸´ºÏÌÝÐÎÇó»ý¹«Ê½×ö¸öÊýÖµ¼ìÑé¡£

» ±¾ÌûÒÑ»ñµÃµÄºì»¨£¨×îÐÂ10¶ä£©

Å®¿¿ÒÂ×°£»Äп¿½ð×°
12Â¥2014-11-03 11:50:06
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

zaq123321

ר¼Ò¹ËÎÊ (ÖøÃûдÊÖ)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
Take a look at
http://functions.wolfram.com/Ele ... Exp/21/ShowAll.html

and see whether you can get some useful info?

» ±¾ÌûÒÑ»ñµÃµÄºì»¨£¨×îÐÂ10¶ä£©

Сľ³æ¸øÎÒÎÂů£¬¸øÎÒÏ£Íû£¬°®¾ÍÒª°®Ð¡Ä¾³æ¡£
13Â¥2014-11-04 03:24:59
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

zaq123321

ר¼Ò¹ËÎÊ (ÖøÃûдÊÖ)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

It can be expected a close form.
Сľ³æ¸øÎÒÎÂů£¬¸øÎÒÏ£Íû£¬°®¾ÍÒª°®Ð¡Ä¾³æ¡£
14Â¥2014-11-04 03:27:00
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

pugilist

½û³æ (ÕýʽдÊÖ)

±¾ÌûÄÚÈݱ»ÆÁ±Î

15Â¥2014-11-04 06:05:27
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

liyunfeng235

½ð³æ (ÕýʽдÊÖ)

Èç¹ûÊÇ¿¼ÑУ¬ºÜ¸ºÔð¸æËßÄã²»»á¿¼ÕâôÄÑ

[ ·¢×ÔСľ³æ¿Í»§¶Ë ]
16Â¥2014-11-04 08:15:52
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

iamsad

ÖÁ×ðľ³æ (ÖøÃûдÊÖ)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
Õâ¸ö»ý·ÖµÄ½á¹ûºÃÏñÊÇVoigtº¯Êý¡£
×¢Òâ  -bx^2 + ax = -b(x - x_0}^2 + bx_0^2, x_0¿ÉÒÔÓÃa ºÍb±íʾ¡£È»ºó×÷±äÁ¿´ú»» x = x-x_0, ¼´¿ÉµÃµ½
http://en.wikipedia.org/wiki/Voigt_profile ÀïÃæµÄ±ê×¼¶¨Òå

» ±¾ÌûÒÑ»ñµÃµÄºì»¨£¨×îÐÂ10¶ä£©

17Â¥2014-11-04 08:44:51
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

shellysong

Í­³æ (³õÈëÎÄ̳)

Ëͺ컨һ¶ä
ÒýÓûØÌû:
12Â¥: Originally posted by nagami at 2014-11-03 11:50:06
Óм¸ÖÖÊÔÊÔ
1.²é»ý·ÖÊÖ²á
2.ÓÐÀíʽչ¿ªÃݼ¶Êý£¬½»´í¼¶ÊýÊÕÁ²Âý£¬gaussº¯ÊýÓëż´ÎÃݺ¯Êý»ý·Ö¹«Ê½ÒÑÖª£¬»¯³É·â±Õ¹«Ê½Âé·³¡£
3.°ÑԭʽkËõÈëxÖУ¬gaussº¯ÊýÀïÃæÒòʽ·Ö½â¡£
¶Ôgaussº¯Êý×öexp(-ikx)Õ¹¿ª¸µÁ¢Ò¶»ý·ÖÌæ»» ...

ллÄúµÄÏêϸ»Ø¸´£¬Äú˵µÃÕâ¸ö¸µÀïÒ¶±ä»»µÄ·½·¨ÎÒÊÔÁËһϣ¬»¹Êǽⲻ³ö¡£¡£¡£
18Â¥2014-11-04 09:28:41
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

shellysong

Í­³æ (³õÈëÎÄ̳)

Ëͺ컨һ¶ä
ÒýÓûØÌû:
13Â¥: Originally posted by zaq123321 at 2014-11-04 03:24:59
Take a look at
http://functions.wolfram.com/ElementaryFunctions/Exp/21/ShowAll.html

and see whether you can get some useful info?

ллÄúµÄÐÅÏ¢À²£¬ÎÒÒ»Ö±¶¼Ã»ÕÒµ½ÕâôȫµÄÖ¸Êýº¯Êý
19Â¥2014-11-04 09:32:47
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

shellysong

Í­³æ (³õÈëÎÄ̳)

Ëͺ컨һ¶ä
ÒýÓûØÌû:
17Â¥: Originally posted by iamsad at 2014-11-04 08:44:51
Õâ¸ö»ý·ÖµÄ½á¹ûºÃÏñÊÇVoigtº¯Êý¡£
×¢Òâ  -bx^2 + ax = -b(x - x_0}^2 + bx_0^2, x_0¿ÉÒÔÓÃa ºÍb±íʾ¡£È»ºó×÷±äÁ¿´ú»» x = x-x_0, ¼´¿ÉµÃµ½
http://en.wikipedia.org/wiki/Voigt_profile ÀïÃæµÄ±ê×¼¶¨Òå

ÄúµÄÕâ¸öÐÅϢ̫ÓаïÖúÀ²£¬ÎÒÒªºÃºÃ¿´Ò»ÏÂÕâ¸övoigtº¯Êý£¡
20Â¥2014-11-04 09:36:30
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ shellysong µÄÖ÷Ìâ¸üÐÂ
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[»ù½ðÉêÇë] ÄÜ·ñÍ˳ö²ÎÓëµÄÃæÉÏÏîÄ¿½â³ýÏÞÏî +16 koalala 2026-08-24 18/900 2026-08-24 15:43 by zhuzg0628
[»ù½ðÉêÇë] ÎÒÃæÉÏÍêµ°ÁË +8 ÇÒÌý»¢Ð¥ 2026-08-20 9/450 2026-08-24 13:52 by zzuzxg
[»ù½ðÉêÇë] 2026¹ú×ÔÈ»º¯ÆÀ·Ñµ½ÕË +17 ÑòÑü°å 2026-08-21 18/900 2026-08-24 12:03 by iaeyuan
[»ù½ðÉêÇë] ½¨Òé»ù½ð·¢²¼Ìáǰ¸ø³öÃ÷È·µÄʱ¼äµã +12 kulium 2026-08-21 15/750 2026-08-24 12:02 by iaeyuan
[»ù½ðÉêÇë] ÅóÓÑȦ¿´µ½µÄ +7 wangzilk 2026-08-18 9/450 2026-08-24 10:50 by cmrandy
[»ù½ðÉêÇë] ÈÃÎÒÖÐÒ»¸öÃæÉϰɣ¡ +13 ´óƼ1987 2026-08-20 16/800 2026-08-24 10:23 by ̫ɵÁË
[»ù½ðÉêÇë] ¿ÆÑй¶ùÌ«ÄÑÁË +18 ÎÒ4´ó°×²Ë 2026-08-20 19/950 2026-08-24 09:47 by ¿­¶÷¹ãÊ¢´ß»¯·ÖÎ
[»ù½ðÉêÇë] ʲôʱºò¿ª½±£¿ +10 CrisMessi 2026-08-18 11/550 2026-08-24 06:50 by ¿ªÐĵÄСʨ×Ó
[»ù½ðÉêÇë] 2026ÄêµÄ¹ú¼ÒÉç¿Æ»ù½ðÏîĿͨѶÆÀÉóµÄйæÔòÓëж¯Ïò¡¢ÐÂÌôÕ½ +4 process2012 2026-08-23 5/250 2026-08-23 19:58 by jurkat.1640
[½Ìʦ֮¼Ò] Ìø²ÛºóÔÚÑÐÏîÄ¿Ôõô°ì£¿ +5 ¼òµ¥»¯xn 2026-08-22 10/500 2026-08-23 12:38 by ¼òµ¥»¯xn
[»ù½ðÉêÇë] ½ñÌì·Å°ñÂ𣿠+15 ²¼²¼ºÍÒ»¶þ 2026-08-19 16/800 2026-08-23 09:55 by ÕÅ´ºÉú
[»ù½ðÉêÇë] 93BebMhtakhǰºó11λ¿ªÍ·¶¼ÊÇ´óд +7 ÇÒÌý»¢Ð¥ 2026-08-17 8/400 2026-08-22 21:55 by ҽѧÀÏÄк¢
[»ù½ðÉêÇë] Ö»ÓÐÿÄêÕâÖÖʱºòÀ´¹ä¹äСľ³æ +24 yaoyewhu2008 2026-08-20 26/1300 2026-08-22 17:43 by kammury
[»ù½ðÉêÇë] filecode£¬4¸öjtjcÁË +13 ziyangfang 2026-08-19 16/800 2026-08-22 17:08 by WH3796
[»ù½ðÉêÇë] ½ñÌì»ù½ð»á³ö½á¹ûÂð£¿20260819 +16 kkkl_v 2026-08-19 17/850 2026-08-22 16:12 by °¢²¼Abu
[»ù½ðÉêÇë] ʱ¼ä´Á½ñÌ죬20ºÅ±äÁË +5 archvillain 2026-08-20 5/250 2026-08-22 06:12 by hui_daxiao
[»ù½ðÉêÇë] ¿´À´½ñÌì²»»á·Å°ñÁË£¿ +8 chengyan1220 2026-08-21 11/550 2026-08-21 17:52 by dcqxinyang
[»ù½ðÉêÇë] ʱ¼ä´ÁÓÖ±äÁË +13 wuchongjun 2026-08-20 19/950 2026-08-21 17:21 by ×Ïɼ´¼
[»ù½ðÉêÇë] Ó¦¸ÃÊÇÏÂÖÜÈý26ÈÕ¹«²¼Á˰ɣ¿ +4 ¹þ¹þ¸ò£¿ 2026-08-21 4/200 2026-08-21 10:58 by Vivilian
[»ù½ðÉêÇë] ½ñÌì·Å°ñûϷÁ衃 +9 yuleib84 2026-08-19 11/550 2026-08-21 10:06 by gltch
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û