±±¾©Ê¯ÓÍ»¯¹¤Ñ§Ôº2026ÄêÑо¿ÉúÕÐÉú½ÓÊÕµ÷¼Á¹«¸æ
²é¿´: 3118  |  »Ø¸´: 7
µ±Ç°Ö»ÏÔʾÂú×ãÖ¸¶¨Ìõ¼þµÄ»ØÌû£¬µã»÷ÕâÀï²é¿´±¾»°ÌâµÄËùÓлØÌû

hbc1234

ľ³æ (СÓÐÃûÆø)

[ÇóÖú] ÇëÎʹâµÄµç³¡±í´ïʽΪʲô¿ÉÒÔд³ÉE+E*µÄ¸´¹²éîÖ®ºÍÐÎʽ£¿ ÒÑÓÐ1È˲ÎÓë

×î½üÔÚһЩ×ÊÁÏÉϾù¿´µ½ÀàËÆ±íÊö£¬½²¹âµÄµç³¡·ÖÁ¿±í´ïΪE=E0 exp[-i(wt-kr)]+E0* exp[+i(wt-kr)]µÄ¸´¹²éîÖ®ºÍµÄÐÎʽ£¬Èçhttp://wenku.baidu.com/view/c0853d9171fe910ef02df804.htmlµÄµÚ¶þÒ³£¬ÔÙÈç¡¶°ëµ¼Ìå¹âÆ×ºÍ¹âѧÐÔÖÊ¡·P514
Ó¡ÏóÖÐÒÔǰ¿Î±¾ÉϽ²µÄµç´Å²¨µç³¡·ÖÁ¿¶¼ÊÇE0 exp[-i(wt-kr)]µÄÐÎʽ£¬ÎªÊ²Ã´»¹Òª¼ÓËüµÄ¸´¹²éîÄØ£¿
»Ø¸´´ËÂ¥

» ²ÂÄãϲ»¶

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

wenÏ×

½ð³æ (ÕýʽдÊÖ)

ÒýÓûØÌû:
3Â¥: Originally posted by hbc1234 at 2014-10-11 10:54:54
Ê×ÏÈллÄúµÄ»Ø´ð£¡»¹ÓÐÈý¸öÎÊÌâÇë½Ì£º
1. ÄúµÄÒâ˼ÊÇ˵£¬Êµ¼Ê¾ßÓÐÎïÀíÒâÒåµÄµç³¡Ç¿¶ÈΪE0¡¤cos(-wt+kr)£¬Ð´³ÉÖ¸ÊýÐÎʽÊÇΪÁË·½±ã¼ÆËã¡£ÄÇô£¬ÓÉÖ¸ÊýÐÎʽµÃµ½µÄÐéÊý²¿·Ö i¡¤E0¡¤sin(-wt+kr)ÊÇ·ñ¾ßÓÐÎïÀíÒâÒ壿ÒòΪ ...

1.ÓÉÖ¸ÊýÐÎʽµÃµ½µÄÐéÊý²¿·ÖÊÇûÓÐʵ¼ÊµÄÎïÀíÒâÒåµÄ¡£µ«ÔÚÑо¿¹âµç³¡Ê±³£²ÉÓÃE0 exp[-i(wt-kr)]µÄÐÎʽ£¬ÎÒÃÇÒ»°ãÈÏΪE0´ú±íÕñ·ù£¬Ö¸Êý²¿·Ö´ú±íÏàλ¡£²»Í¬µÄ¼ÆËã¶ÔÏ󣬲ÉÓõÄÐÎʽ²»Ò»Ñù£¬ËùÒÔ£¬ÔÚÎÒÃǼÆËãÆÂӡͤʸÁ¿µÈʱ²ÉÓÃE0¡¤cos(wt-kr)ÐÎʽ£¬ÔÚ»ý·ÖµÈʱ²ÉÓÃÖ¸ÊýÐÎʽ¡£Ö»ÊDZíÕ÷¹â³¡µÄ;¾¶²»Ò»Ñù¡£
2.µÚÒ»¸ö¹«Ê½ºÍ8.19ʽÊÇÒ»ÑùµÄ£¬¾ÍÏñÄã˵µÄΪÁ˱íʾºó±ß²¿·ÖÊǸ´¹²é·Ö²ÅÓÃÁËE0*£¨µÈÓÚE0£©µÄÐÎʽ£¬Æäʵ¸ü¾ßÓÐÎïÀíÒâÒå¸üÖ±¹ÛµÄµÄ±íʾ¿ÉÒÔ´Óµ¥¸öƵÂʹⳡÇé¿ö¿´³ö£ºE=E£¨w£©exp£¨-iwt£©+E*(w) exp(iwt),ÕâÀïÕñ·ùÊǸ´Õñ·ù£¬¿¼Âǵ½µç³¡µÄÕæÊµÐÔ£¬E*£¨w£©=E£¨-w£©¡£×¢Ò⣬ÎÒÕâÀïµÄ±í´ïʽºÍÄãµÄÁ½ÕÅͼƬµÄ¶¼²»Ò»Ñù£¡»»¾ä»°Ëµ£¬ÄãÉÏ´«µÄÁ½ÕÅͼƬÖеÄE0¶¼ÊÇʵÊý£¬¶øÎÒËùдµÄE£¨w£©ÊÇÐéÊý¡£PS£ºÕâÖÖ¸´¹²éîÐÎʽ£¬ÆäʵÊDZíʾƵÂÊwºÍƵÂÊ-wµÄ¹â³¡¡£
3.ÆäʵE0¾ÍÊÇÒ»¸öÊý£¬¼ÆËã³öµÄȷʵ¿ÉÒÔÊÇ2E0£¨2E0ÊÇÕñ·ù£©£¬µ«Ò»°ãµÄ£¬ÎÒÃÇϰ¹ß±íʾΪE0¡®=2E0£¬¿ÉÒÔ°ÑϵÊý2ÎüÊÕ½øÈ¥£¬±í¹ÛÖµ²»±ä¡£×÷Ϊһ¸ö±í´ïʽ£¬ÕâÀïµÄ2±¶Æäʵ²»»áÓ°ÏìÆäËû¼ÆË㣬ÆäËûµÄ¼ÆËã½á¹ûÖÐ×Ü»á³öÏÖ2E0µÄÏºÍE0'µÄ±í´ïʽÊÇÒ»ÑùµÄ£¨Òª±íÕ÷µÄÎïÀíÁ¿²»±ä£©£¬ÎïÀíÒâÒåҲûÓÐ±ä¡£Ëæ×ÅÄãÒÔºóÉîÈëµÄѧϰ£¬ÄãÒ²»á·¢ÏÖ£¬ÓÐЩÊé¼®ÀïÃæµç³¡±í´ïʽÖÐȷʵ³öÏÖÁË1/2µÄϵÊý£¬ÕâÖÖ±íʾ»á¸üºÃÀí½âЩ¡£
³Áʱ̹Ȼ£¬¸¡Ê±µ­È»
5Â¥2014-10-12 01:09:32
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
²é¿´È«²¿ 8 ¸ö»Ø´ð

wenÏ×

½ð³æ (ÕýʽдÊÖ)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï
¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
hbc1234: ½ð±Ò+5, ¡ï¡ï¡ïºÜÓаïÖú, лл£¡ 2014-10-11 10:34:52
hbc1234: ½ð±Ò+5, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸ 2014-10-12 20:27:30
¹âµç³¡¿ÉÒÔд³É¸´¹²éîÖ®ºÍµÄÐÎʽ¡£E0*cos[-i(wt-kr)]ÐÎʽÊǾßÓÐʵ¼ÊµÄÎïÀíÒâÒåµÄ£¬ÊÇÕæÊµ´æÔÚµÄÒ»ÖÖÐÎʽ¡£µ«ÊÇÔÚ¼ÆËãÓйص糡ÓйزÎÁ¿µÄ¹ý³ÌÖУ¬ÔÚÊýѧÉÏΪÁ˱ãÓÚ¼ÆË㣬³£²ÉÓÃÖ¸ÊýÐÎʽ£¬ÓÉÅ·À­¹«Ê½¿ÉÒÔÖªµÀE0 exp[-i(wt-kr)]¿ÉÒÔ»¯³öE0*cos[-i(wt-kr)]ÐÎʽ£¨È¡Êµ²¿£©£¬ËùÒÔ²ÉÓø´¹²éîÖ®ºÍµÄÐÎʽ£¨ÑϸñµÈÓÚE0*cos[-i(wt-kr)]£©¡£
E0 exp[-i(wt-kr)]ºÍE0 exp[i(wt-kr)]µÄÖ¸Êý·ûºÅÏà·´£¬±íʾÁ½ÖÖÑØÏà·´·½Ïò´«²¥µÄ¹â²¨£¬Ò»°ãÈ¡ÆäÖÐÒ»ÖÖÀ´Ñо¿µç³¡µÄÐÔÖÊ£¬³£È¡E0 exp[-i(wt-kr)]ÐÎʽµÄ¡£×ÜÖ®£¬Ò»¾ä»°£¬Ð´³ÉE0*cos[-i(wt-kr)]ÊÇΪÁ˼ÆËã·½±ã£¬Ã»ÓÐʵ¼ÊµÄÎïÀíÒâÒå¡£
´ó¶àÊýÇé¿öÏ£¬ÀûÓø´ÊýÐÎʽE0 exp[-i(wt-kr)]±íʾ³¡Á¿£¬¾ÍÏßÐÔÊýѧÔËË㣬Èç»ý·Ö ΢·Ö ÇóºÍµÈÊÇûÓÐÎÊÌâµÄ£¬µ«µ±Éæ¼°µ½³¡Á¿µÄ³Ë»ú»ò³Ë·½£¬ÈçÄÜÁ¿ÃܶȻòÆÂӡͤʸÁ¿Ê±¾Í»á³öÎÊÌ⣬ÕâʱºòÒªÓÃÎïÀíÁ¿µÄʵÊýE0*cos[-i(wt-kr)]À´±íʾ¡£
³Áʱ̹Ȼ£¬¸¡Ê±µ­È»
2Â¥2014-10-10 15:46:51
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

hbc1234

ľ³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
2Â¥: Originally posted by wenÏ× at 2014-10-10 15:46:51
¹âµç³¡¿ÉÒÔд³É¸´¹²éîÖ®ºÍµÄÐÎʽ¡£E0*cosÐÎʽÊǾßÓÐʵ¼ÊµÄÎïÀíÒâÒåµÄ£¬ÊÇÕæÊµ´æÔÚµÄÒ»ÖÖÐÎʽ¡£µ«ÊÇÔÚ¼ÆËãÓйص糡ÓйزÎÁ¿µÄ¹ý³ÌÖУ¬ÔÚÊýѧÉÏΪÁ˱ãÓÚ¼ÆË㣬³£²ÉÓÃÖ¸ÊýÐÎʽ£¬ÓÉÅ·À­¹«Ê½¿ÉÒÔÖªµÀE0 exp¿ÉÒÔ»¯³öE0*co ...

Ê×ÏÈллÄúµÄ»Ø´ð£¡»¹ÓÐÈý¸öÎÊÌâÇë½Ì£º
1. ÄúµÄÒâ˼ÊÇ˵£¬Êµ¼Ê¾ßÓÐÎïÀíÒâÒåµÄµç³¡Ç¿¶ÈΪE0¡¤cos(-wt+kr)£¬Ð´³ÉÖ¸ÊýÐÎʽÊÇΪÁË·½±ã¼ÆËã¡£ÄÇô£¬ÓÉÖ¸ÊýÐÎʽµÃµ½µÄÐéÊý²¿·Ö i¡¤E0¡¤sin(-wt+kr)ÊÇ·ñ¾ßÓÐÎïÀíÒâÒ壿ÒòΪÎÒ¹À¼Æ²»ÊÇËùÓÐÔËËã¶¼¿ÉÒÔÍêÈ«°Ñsin²¿·ÖÏûµô¡£

2. ÎÒÉÏ´«ÁËÁ½ÕÅͼƬÇëÎʹâµÄµç³¡±í´ïʽΪʲô¿ÉÒÔд³ÉE+E*µÄ¸´¹²éîÖ®ºÍÐÎʽ£¿
ÇëÎʹâµÄµç³¡±í´ïʽΪʲô¿ÉÒÔд³ÉE+E*µÄ¸´¹²éîÖ®ºÍÐÎʽ£¿-1

ÔÚÕâÁ½¸ö³ö´¦ÖУ¬¾ùд×÷E0*±íʾ¹²éî¡£°´ÎÒµÄÀí½â£¬ÕâÀïE0Êǵ糡ǿ¶ÈµÄÕñ·ù£¬Ó¦¸ÃΪʵÊý£¬¼ÓÐǺÅÖ»ÊÇΪÁ˱íʾÕû¸öºó°ë²¿·ÖÊǸ´¹²é·Ö¡£ÎÒµÄÀí½â¶ÔÂ𣿻òÕßE0Ò²¾ßÓÐÐ鲿£¿

3. Èç¹ûµÚ¶þ¸öÎÊÌâÎÒµÄÀí½âÊǶԵģ¬Ëã³öµÄE=2E0¡¤cos(-wt+kr)£¬ÕâÀïµÄ¶þ±¶ÊÇ·ñ»áÓ°ÏìÆäËû¼ÆË㣿»òÕß˵EµÄ¾ßÌåÊýÖµ²î¶þ±¶Ã»Ê²Ã´Ó°Ï죿

лл£¡
3Â¥2014-10-11 10:54:54
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

hbc1234

ľ³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
2Â¥: Originally posted by wenÏ× at 2014-10-10 15:46:51
¹âµç³¡¿ÉÒÔд³É¸´¹²éîÖ®ºÍµÄÐÎʽ¡£E0*cosÐÎʽÊǾßÓÐʵ¼ÊµÄÎïÀíÒâÒåµÄ£¬ÊÇÕæÊµ´æÔÚµÄÒ»ÖÖÐÎʽ¡£µ«ÊÇÔÚ¼ÆËãÓйص糡ÓйزÎÁ¿µÄ¹ý³ÌÖУ¬ÔÚÊýѧÉÏΪÁ˱ãÓÚ¼ÆË㣬³£²ÉÓÃÖ¸ÊýÐÎʽ£¬ÓÉÅ·À­¹«Ê½¿ÉÒÔÖªµÀE0 exp¿ÉÒÔ»¯³öE0*co ...

ÁíÍ⣬ÎÒ²éÔĿα¾·¢ÏÖ£¬²¨µÄ±íʾ·½Ê½Ó¦¸ÃΪE0¡¤cos(wt-kr)£¬²»ÖªÄúÊÇ·ñ±ÊÎóд×÷E0¡¤cos[-i(wt-kr)]
4Â¥2014-10-11 11:03:35
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] Çóµ÷¼ÁÍÆ¼ö +3 ÄÏɽÄÏ@ 2026-04-01 3/150 2026-04-02 12:09 by xiaoranmu
[¿¼ÑÐ] ²ÄÁÏ¿¼Ñе÷¼Á +9 Gs´óÍõ 2026-04-02 9/450 2026-04-02 10:24 by olim
[¿¼ÑÐ] Ò»Ö¾Ô¸9³õÊÔ366 ±¾Ë«·ÇÇóµ÷¼Á +4 ÔËÆøÀ´µÃÈôÓÐËÆÎ 2026-04-02 4/200 2026-04-02 09:56 by guanxin1001
[¿¼ÑÐ] Ò»Ö¾Ô¸Äϲý´óѧ324Çóµ÷¼Á +11 hanamiko 2026-04-01 11/550 2026-04-02 09:00 by sanrepian
[¿¼ÑÐ] »¯Ñ§¹¤³Ìר˶324·Ö£¬Ò»Ö¾Ô¸Öйú¿óÒµ´óѧÇóµ÷¼Á +7 ¹¢¹¢1314 2026-04-01 7/350 2026-04-02 07:40 by ÉÐË®¸óÖ÷
[¿¼ÑÐ] 266·Ö£¬Ò»Ö¾Ô¸µçÆø¹¤³Ì£¬±¾¿Æ²ÄÁÏ£¬Çó²ÄÁÏרҵµ÷¼Á +10 ÍÛºôºßºôºß 2026-04-01 11/550 2026-04-01 21:48 by chyhaha
[¿¼ÑÐ] ʳƷѧ˶362Çóµ÷¼Á +3 xuanxianxian 2026-04-01 3/150 2026-04-01 21:05 by °¡Àî999
[¿¼ÑÐ] 310·ÖÇóµ÷¼Á +4 ³É¹¦Éϰ¶wang 2026-04-01 4/200 2026-04-01 20:35 by liu823948201
[¿¼ÑÐ] 0817»¯¹¤Ñ§Ë¶µ÷¼Á +11 ŬÁ¦Éϰ¶ÖУ¡ 2026-03-31 11/550 2026-04-01 20:30 by Àµ´ºÑÞ
[¿¼ÑÐ] 332Çóµ÷¼Á +8 Lyy930824@ 2026-03-29 8/400 2026-04-01 18:40 by ǧ¾û³ÎÓñÓî°¡
[¿¼ÑÐ] 349Çóµ÷¼Á +6 ³ÔµÄ²»ÉÙ 2026-04-01 6/300 2026-04-01 17:55 by JYD2011
[¿¼ÑÐ] 309Çóµ÷¼Á +19 Ë­²»ÊÇÉÙÄê 2026-03-29 19/950 2026-04-01 15:47 by jp9609
[¿¼ÑÐ] Ò»Ö¾Ô¸Äϲý´óѧ324Çóµ÷¼Á +7 hanamiko 2026-03-30 7/350 2026-04-01 13:22 by JourneyLucky
[¿¼ÑÐ] »·¾³¹¤³Ì 085701£¬267Çóµ÷¼Á +15 minht 2026-03-29 16/800 2026-04-01 10:13 by li_sujuan99
[¿¼ÑÐ] Ò»Ö¾Ô¸ÎäÀí²ÄÁϹ¤³Ì302µ÷¼Á»·»¯»ò»¯¹¤ +15 Doleres 2026-03-31 16/800 2026-04-01 09:49 by lfj11
[¿¼ÑÐ] 335Çóµ÷¼Á +3 321* 2026-03-31 4/200 2026-04-01 00:00 by 321*
[¿¼ÑÐ] 346Çóµ÷¼Á Ò»Ö¾Ô¸070303Óлú»¯Ñ§ +11 Âܲ·ìÀÇà²Ë 2026-03-28 12/600 2026-03-31 17:54 by xhai2011
[¿¼ÑÐ] 334Çóµ÷¼Á +7 Trying] 2026-03-31 7/350 2026-03-31 12:33 by Î޼ʵIJÝÔ­
[¿¼ÑÐ] 283Çóµ÷¼Á£¨080500£© +14 A child 2026-03-27 14/700 2026-03-30 12:06 by ̽123
[¿¼ÑÐ] 295Çóµ÷¼Á +5 1428151015 2026-03-27 6/300 2026-03-28 04:04 by fmesaito
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û