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[ Last edited by 443708933 on 2013-8-26 at 17:09 ]
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443708933

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2Â¥2013-08-28 10:55:26
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hank612

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443708933: ½ð±Ò+2, Àϰå·ÇÈÏΪÓÃÁôÊý¿ÉÒÔ×ö£¬µ«ÊÇÕâÖÖÈý½Çº¯ÊýÀïÌ׸ùºÅµÄÕ¹¿ªÃ»ÄÇô¼òµ¥£¬ÎÒ³¢ÊÔ×ÅÕÒ-1µÄÏÔõô×îºóÊÇ0£¬Ò»¶¨²»¶Ô¡£ 2013-09-05 13:03:50
Ò»µã»¯¼òÏë·¨:
(1). B*Cos(phi) + C*Sin(phi) = D*Cos(phi + theta), ÓÉÓÚ»ý·ÖÊÇ0µ½2 Pi, ³£Êýtheta¶Ô»ý·Ö²»Æð×÷ÓÃ, ËùÒÔ ¸ùºÅÏÂÊÇ A-B*Cos(phi).

(2) w/2 ¿ÉÒÔ±»ÎüÊÕµ½¸ùºÅÀïÃæÈ¥, ¿ÉÒÔºöÂÔ.  i Ç°ÃæµÄ¸ººÅҲûÓÐʵÖÊÓô¦, ¿ÉÒÔºöÂÔ.

ËùÒÔ »ý·Öº¯Êýʵ²¿ÊÇ, Cos ( Sqrt(A-B *Cos(phi) ) ). ¿´µ½ÕâÀï, Â¥Ö÷»¹ÊÇÕÒÊýÖµ½â°É.

Èç¹ûд³É¸´±äº¯Êý, e^{i* Sqrt( A - B * (Z+Z^{-1}) ) } ÎÒ»¹Õæ²»ÖªµÀÈçºÎÔÚÁãµã¸½½üÕ¹¿ª, ·ñÔò¾Í¿ÉÒÔÓÃÁôÊý¶¨ÀíÁË, ÄÄÅÂz=0ÊÇ»ý·Öº¯ÊýµÄ±¾ÐÔÆæµã.
We_must_know. We_will_know.
3Â¥2013-08-30 02:48:04
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hank612

ÖÁ×ðľ³æ (ÖøÃûдÊÖ)

ÒýÓûØÌû:
3Â¥: Originally posted by hank612 at 2013-08-30 02:48:04
Ò»µã»¯¼òÏë·¨:
(1). B*Cos(phi) + C*Sin(phi) = D*Cos(phi + theta), ÓÉÓÚ»ý·ÖÊÇ0µ½2 Pi, ³£Êýtheta¶Ô»ý·Ö²»Æð×÷ÓÃ, ËùÒÔ ¸ùºÅÏÂÊÇ A-B*Cos(phi).

(2) w/2 ¿ÉÒÔ±»ÎüÊÕµ½¸ùºÅÀïÃæÈ¥, ¿ÉÒÔºöÂÔ.  i Ç°ÃæµÄ¸ººÅҲû ...

Â¥Ö÷, Ò²ÐíÄãÀϰåÊǶԵÄ, ½ªÊÇÀϵÄÀ±; ²¢ÇÒÄãµÄ´ð°¸Ò²ÊǶԵÄ,Ö»ÊÇÄã²»ÐŶøÒÑ.
¶ÔCos( sqrt(A-B*Sin(x)) ) ÔÚ[0, 2Pi]É϶Ôx»ý·Ö, ÎÒÃÇÏ£Íû[0, pi/2] Óë[pi/2, pi] »¥ÏàµÖÏû, [pi, 3/2 pi] Óë[3/2 pi, 2pi] µÖÏû, µ«ÕâÊǺÜÏÔÈ»µÄ, ×ö±äÁ¿Ìæ»» y=pi -x ¼´¿É. Sin( sqrt(A-B*Sin(x)) )ÄDz¿·ÖÒ²ÊÇͬһÇé¿ö. ËùÒÔ×îÖմ𰸾ÍÊÇÁã.

²»Ê¶Â®É½ÕæÃæÄ¿, Ö»ÔµÉíÔÚ´ËɽÖÐ.
We_must_know. We_will_know.
4Â¥2013-09-07 07:21:41
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