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lewmihu

½ð³æ (СÓÐÃûÆø)


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Õâ¸öÒª½èÖú¼ÆËã»úÀ´¼ÆËã
2Â¥2010-12-28 17:36:14
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xiegangmai

°æÖ÷ (Ö°Òµ×÷¼Ò)


ÒýÓûØÌû:
Originally posted by lewmihu at 2010-12-28 16:36:33:
¼±×ÅÒª½á¹û£¬¸÷λͬѧÓлá½âµÃ°ï¸öæ°¡

Ëĸö·½³Ì£¬Èý¸ö±äÁ¿£¬¿ÉÄÜÎ޽⡣
3Â¥2010-12-28 17:53:52
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

xiegangmai

°æÖ÷ (Ö°Òµ×÷¼Ò)


lewmihu(½ð±Ò+10): 2010-12-30 09:47:12
ÒýÓûØÌû:
Originally posted by ¸÷³ÉÒ»¼ÒÖ®ÑÔ at 2010-12-28 17:36:14:
Õâ¸öÒª½èÖú¼ÆËã»úÀ´¼ÆËã

ÓÃMATLAB´ó¸ÅËãÁËһϣ¬²»Öª¶Ô²»¶Ô¡£
CODE:
>> syms h k l
f1 = 2.5712 * sqrt( ( 4 * ( h ^ 2 + h * k + k ^2 ) / ( 3 * 3.232 ^ 2 ) + l ^ 2 / 5.147 ^ 2 ) ) - 1;
f2 = sqrt( 1.2957 * ( h ^ 2 + k ^ 2 + h * k + 0.2957 * l ^ 2 ) ) * cos( 7.78 * pi / 180 ) + 0.5 * h - 0.2957 * l + k;
f3 = sqrt( 1.2957 * ( h ^ 2 + k ^ 2 + h * k + 0.2957 * l ^ 2 ) ) * cos( 44.22 * pi / 180 ) - 0.5 * h + 0.5 * k - 0.2957 * l;
f4 = sqrt( h ^ 2 + k ^ 2 + h * k + 0.2957 * l ^ 2 ) * cos( 71.778 * pi / 180 ) + 0.5 * k + h;

F1 = solve( f1, f2, f3, h, k, l );
F2 = solve( f1, f3, f4, h, k, l );
F3 = solve( f1, f2, f4, h, k, l );
F4 = solve( f2, f3, f4, h, k, l );
>> F1.h

ans =

                      [0.1661439598 - 0.007282097086  i]
                      [                                ]
                      [0.1661439598 + 0.007282097086  i]
>> F2.h

ans =

                       [0.1655947219 + 0.01296695154  i]
                       [                               ]
                       [0.1655947219 - 0.01296695154  i]
>> F3.h

ans =

                      [0.1652496131 + 0.005521010225  i]
                      [                                ]
                      [0.1652496131 - 0.005521010225  i]
>> F4.h

ans =

                                      0.

4Â¥2010-12-28 17:59:43
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

wfwpq

Ìú¸Ëľ³æ (ÖøÃûдÊÖ)


lewmihu(½ð±Ò+30, ²©Ñ§EPI+1): 2010-12-30 09:46:37
>> syms l h k;[l h k]=solve('cos(44.22*pi/180)=(0.5*h+0.2957*l-0.5*k)/sqrt(1.2597*(h^2+k^2+h*k+0.2957*l^2))','cos(71.778*pi/180)=(-0.5*k-h)/sqrt(h^2+k^2+h*k+0.2957*l^2)','2.5712*sqrt(4*(h^2+h*k+k^2)/(3*3.232^2)+l^2/5.147^2)=1')

l =

0.1128765955661879120003069241437


h =

-0.90654616138783667156059105710971


k =

1.2373847796375348971671727500807

´ËΪMatlab×¼½âÎö½â
5Â¥2010-12-28 18:19:25
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

wfwpq

Ìú¸Ëľ³æ (ÖøÃûдÊÖ)


ÒýÓûØÌû:
Originally posted by lewmihu at 2010-12-28 16:36:33:
¼±×ÅÒª½á¹û£¬¸÷λͬѧÓлá½âµÃ°ï¸öæ°¡

²¹³äһϰ¡£¬Ëĸö·½³ÌÖ»ÐèÒªÈý¸ö¼´¿É£¬
ÈôÖ»ÓúóÃæµÄÈý¸ö·½³ÌÊÇÎÞ½âÎö½âµÄ
>> syms l h k;[l h k]=solve('cos(7.78*pi/180)=(-0.5*h+0.2958*l-k)/sqrt(1.2597*(h^2+k^2+h*k+0.2957*l^2))','cos(44.22*pi/180)=(0.5*h+0.2957*l-0.5*k)/sqrt(1.2597*(h^2+k^2+h*k+0.2957*l^2))','cos(71.778*pi/180)=(-0.5*k-h)/sqrt(h^2+k^2+h*k+0.2957*l^2)')
Warning: Explicit solution could not be found.
> In solve at 98

l =

[ empty sym ]


h =

     []


k =

     []
±ØÐëʹÓõÚÒ»¸ö·½³Ì²Å¿ÉÒÔ
6Â¥2010-12-28 18:26:07
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

³½·ç

Ìú³æ (³õÈëÎÄ̳)


ÒýÓûØÌû:
Originally posted by lewmihu at 2010-12-28 16:36:33:
¼±×ÅÒª½á¹û£¬¸÷λͬѧÓлá½âµÃ°ï¸öæ°¡

ÎÞ½â°É
7Â¥2010-12-28 22:35:55
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

sunshineck

Ìú¸Ëľ³æ (ÖøÃûдÊÖ)


ÒýÓûØÌû:
Originally posted by ³½·ç at 2010-12-28 22:35:55:

ÎÞ½â°É

ȷʵÎÞ½â
8Â¥2010-12-29 14:53:05
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

lewmihu

½ð³æ (СÓÐÃûÆø)


ÒýÓûØÌû:
Originally posted by wfwpq at 2010-12-28 18:19:25:
>> syms l h k;[l h k]=solve('cos(44.22*pi/180)=(0.5*h+0.2957*l-0.5*k)/sqrt(1.2597*(h^2+k^2+h*k+0.2957*l^2))','cos(71.778*pi/180)=(-0.5*k-h)/sqrt(h^2+k^2+h*k+0.2957*l^2)','2.5712*sqrt(4*(h^2+h ...

µ«ÊÇÕâ¸ö½â´úÈë½Ç¶È·½³Ì²»·ûºÏ°¡
9Â¥2010-12-29 19:59:57
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

wfwpq

Ìú¸Ëľ³æ (ÖøÃûдÊÖ)


>> syms l h k;[l h k]=solve('cos(7.78*pi/180)=(-0.5*h+0.2958*l-k)/sqrt(1.2597*(h^2+k^2+h*k+0.2957*l^2))','cos(71.778*pi/180)=(-0.5*k-h)/sqrt(h^2+k^2+h*k+0.2957*l^2)','2.5712*sqrt(4*(h^2+h*k+k^2)/(3*3.232^2)+l^2/5.147^2)=1')

l =

0.10004078040232283602903575751671


h =

-0.88087352251719425909330478731521


k =

1.2835490072381379552799134869021

ÄãÔÙÊÔÊÔÕâ¸ö¿´¿´£¬ÕâÒ»×é½âÊǸù¾ÝµÚ1¡¢2¡¢4¸ö·½³ÌËã³öÀ´µÄ
10Â¥2010-12-30 13:38:30
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

wfwpq

Ìú¸Ëľ³æ (ÖøÃûдÊÖ)


>> syms l h k;[l h k]=solve('cos(7.78*pi/180)=(-0.5*h+0.2958*l-k)/sqrt(1.2597*(h^2+k^2+h*k+0.2957*l^2))','cos(44.22*pi/180)=(0.5*h+0.2957*l-0.5*k)/sqrt(1.2597*(h^2+k^2+h*k+0.2957*l^2))','2.5712*sqrt(4*(h^2+h*k+k^2)/(3*3.232^2)+l^2/5.147^2)=1')
Warning: possibly spurious solutions [solvelib::solve_sys]

l =

   0.2192212129795302796638513711869
  -0.2192212129795302796638513711869
  0.10849071521000389499775457145023
-0.10849071521000389499775457145023


h =

  -1.1081530884262844769818164731015
   1.1081530884262844769818164731015
-0.88657016017767077026585302583889
  0.88657016017767077026585302583889


k =

  0.71670695842580947821001081264815
-0.71670695842580947821001081264815
   1.2785744505905856362065314907789
  -1.2785744505905856362065314907789
ÕâÊǸù¾ÝµÚ1¡¢2¡¢3¸ö·½³Ì¼ÆËã³öÀ´µÄ½â£¬¿ÉÄÜ»áÓмٽ⣬Äã¿ÉÒÔ½«h¡¢k¡¢l·Ö±ðÈ¡¶ÔÓ¦µÄÒ»×é½âÊÔÊÔ¿´
11Â¥2010-12-30 13:44:39
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

wfwpq

Ìú¸Ëľ³æ (ÖøÃûдÊÖ)


ÒýÓûØÌû:
Originally posted by wfwpq at 2010-12-30 13:44:39:
>> syms l h k;[l h k]=solve('cos(7.78*pi/180)=(-0.5*h+0.2958*l-k)/sqrt(1.2597*(h^2+k^2+h*k+0.2957*l^2))','cos(44.22*pi/180)=(0.5*h+0.2957*l-0.5*k)/sqrt(1.2597*(h^2+k^2+h*k+0.2957*l^2))','2.57 ...

²¹³äһϣ¬¶ÔÓ¦µÄÒ»×é½â¾ÍÊÇÈôhÈ¡µÚÒ»¸ö½â£¬Ôòk¡¢lҲȡµÚÒ»¸ö½â£»ÒÔ´ËÀàÍÆ
12Â¥2010-12-30 13:46:07
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

lewmihu

½ð³æ (СÓÐÃûÆø)


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13Â¥2010-12-31 10:30:17
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