| ²é¿´: 782 | »Ø¸´: 6 | |||
| µ±Ç°Ö÷ÌâÒѾ´æµµ¡£ | |||
hxsjcÖ÷¹ÜÇø³¤
|
[½»Á÷]
ÇóÖúÇòµÄÌî³äÂÊ
|
||
| ÇóÖúÓÐʲô·½·¨¿ÉÒÔÄ£Äâ¼ÆËã³öÒ»¸ö´óµÄÈÝÌåÖÐСµÄÇòÐÎ΢Á£µÄÌî³ä¶È¡£ÈÝÌå¿ÉÒÔΪÁ¢·½Ì壬ԲÖùÌåµÈ²»Í¬³ß´ç²»Í¬ÐÎ×´£¬Î¢Á£ÎªÇòÐΣ¬µ«ÊÇÇòÖ±¾¶¿ÉÒԱ仯£¬Ò²¿ÉÒÔÑ¡Ôñ²»Í¬Ö±¾¶µÄ¶àÖÖÇò½øÐлìºÏ¡£ |
» ²ÂÄãϲ»¶
²ÄÁÏר˶306Ó¢Ò»Êý¶þ
ÒѾÓÐ7È˻ظ´
ÇóÉúÎïѧµ÷¼Á
ÒѾÓÐ3È˻ظ´
²ÄÁÏ¿ÆÑ§Ó빤³Ì339Çóµ÷¼Á
ÒѾÓÐ10È˻ظ´
309Çóµ÷¼Á
ÒѾÓÐ10È˻ظ´
ÉúÎïѧ 296 Çóµ÷¼Á
ÒѾÓÐ11È˻ظ´
321Çóµ÷¼Á
ÒѾÓÐ8È˻ظ´
Ò»Ö¾Ô¸Ö£´ó085600£¬310·ÖÇóµ÷¼Á
ÒѾÓÐ6È˻ظ´
295²ÄÁϹ¤³Ìר˶Çóµ÷¼Á
ÒѾÓÐ11È˻ظ´
08¹¤¿Æ275·ÖÇóµ÷¼Á
ÒѾÓÐ9È˻ظ´
²ÄÁϵ÷¼Á
ÒѾÓÐ12È˻ظ´
bluesine
Ö÷¹ÜÇø³¤
¿ÆÔ·Ð¡Ä¾³æ
![]()
![]()
![]()
![]()
- ÊýѧEPI: 5
- Ó¦Öú: 132 (¸ßÖÐÉú)
- ¹ó±ö: 1.991
- ½ð±Ò: 9858.9
- É¢½ð: 89
- ºì»¨: 19
- Ìû×Ó: 3624
- ÔÚÏß: 377.6Сʱ
- ³æºÅ: 869544
- ×¢²á: 2009-10-12
- ÐÔ±ð: GG
- רҵ: ÊýѧÎïÀí
¡ï ¡ï
Сľ³æ(½ð±Ò+0.5):¹§Ï²ÇÀɳ·¢£¬¸ø¸öºì°ü
haixing2008(½ð±Ò+1,VIP+0):¶àл½»Á÷£¡£¡~ 1-9 16:01
Сľ³æ(½ð±Ò+0.5):¹§Ï²ÇÀɳ·¢£¬¸ø¸öºì°ü
haixing2008(½ð±Ò+1,VIP+0):¶àл½»Á÷£¡£¡~ 1-9 16:01
|
Õâ¸öÓеãÄѶȰ¡£¬ºÇºÇ¡£ ½¨ÒéÂ¥Ö÷ÏÈÄüòµ¥µÄŪ£¬±ÈÈçÏȼÆËãÔÚËùÓÐСÇòÖ±¾¶¶¼Ò»ÑùµÄÇé¿ö£¬ÔÚÁ¢·½Ì壬ԲÖùÌåµÈ²»Í¬³ß´ç²»Í¬ÐÎ×´ÖеÄÌî³äÂÊ¡£°ÑÕâ¸öÎÊÌâ½â¾öÁËÔÚ½â¾öÄãÕâ¸öÎÊÌ⣬ֱ½ÓÀ´ºÃ¼¬Êָоõ |

2Â¥2010-01-05 21:42:28
attractor
¶Ò»»¹ó±ö
![]()
![]()
![]()
![]()
- Ó¦Öú: 0 (Ó×¶ùÔ°)
- ½ð±Ò: 7263.9
- ºì»¨: 3
- Ìû×Ó: 1143
- ÔÚÏß: 620Сʱ
- ³æºÅ: 495210
- ×¢²á: 2008-01-14
- ÐÔ±ð: GG
- רҵ: »ù´¡ÎïÀíѧ
¡ï ¡ï
Сľ³æ(½ð±Ò+0.2):ÇÀÁ˸öС°åµÊ£¬¸ø¸öºì°ü
bluesine(½ð±Ò+1,VIP+0):Ŷ£¿¡°Óиö¿ªÆÕÀÕ²ÂÏëµ½ÏÖÔÚҲû½â¾ö¡±Ô¸ÎÅÆäÏê 1-7 14:41
Сľ³æ(½ð±Ò+0.2):ÇÀÁ˸öС°åµÊ£¬¸ø¸öºì°ü
bluesine(½ð±Ò+1,VIP+0):Ŷ£¿¡°Óиö¿ªÆÕÀÕ²ÂÏëµ½ÏÖÔÚҲû½â¾ö¡±Ô¸ÎÅÆäÏê 1-7 14:41
|
Õâ¿ÉÊǸöÄÑÌ⣬Óиö¿ªÆÕÀÕ²ÂÏëµ½ÏÖÔÚҲû½â¾ö¡£ Èç¹ûÔÚÈÝÆ÷ÖÐÌî×°£¬»¹ÓëÌî×°µÄÎïÀí¹ý³ÌÓйء£ |

3Â¥2010-01-06 19:44:48
wuguocheng
½û³æ
- Ó¦Öú: 2 (Ó×¶ùÔ°)
- ¹ó±ö: 7.049
- ½ð±Ò: 3674.1
- É¢½ð: 316
- ºì»¨: 22
- ɳ·¢: 1
- Ìû×Ó: 3032
- ÔÚÏß: 352.5Сʱ
- ³æºÅ: 623107
- ×¢²á: 2008-10-11
- ÐÔ±ð: GG
- רҵ: Á¦Ñ§ÖеĻù±¾ÎÊÌâºÍ·½·¨
- ¹ÜϽ: ÍÁľ½¨Öþ

4Â¥2010-01-07 13:46:32
attractor
ר¼Ò¹ËÎÊ
![]()
![]()
![]()
![]()
- Ó¦Öú: 0 (Ó×¶ùÔ°)
- ½ð±Ò: 7263.9
- ºì»¨: 3
- Ìû×Ó: 1143
- ÔÚÏß: 620Сʱ
- ³æºÅ: 495210
- ×¢²á: 2008-01-14
- ÐÔ±ð: GG
- רҵ: »ù´¡ÎïÀíѧ
¡ï ¡ï ¡ï
bluesine(½ð±Ò+3,VIP+0):лл£¬ÓÖ³¤¼ûʶÁË£¬ºÙºÙ 1-7 22:09
bluesine(½ð±Ò+3,VIP+0):лл£¬ÓÖ³¤¼ûʶÁË£¬ºÙºÙ 1-7 22:09
|
Hilbert¡¯s 18th problem In 1900, David Hilbert presented to the International Mathematical Congress in Paris a list of 23 problems which he hoped would guide mathematical research in the twentieth century. The 18th problem was concerned with sphere packing and space-filling polyhedra. "I point out the following question (. . .) important to number theory and perhaps sometimes useful to physics and chemistry: How one can arrange most densely in space an infinite number of equal solids of given form, e.g., spheres with given radii or regular tetrahedra with given edges (or in prescribed positions), that is, how can one so fit them together that the ratio of the filled to the unfilled space may be as great as possible?" Õâ¸öÎÊÌâͨ³£½ÐKepler Conjecture¡£¾Ý˵×îÔçÊÇÒ»¸öº£µÁÌá³öÀ´µÄ£¬ËûÏëÖªµÀÄÜ·ñ²âÁ¿Ò»Ï¼װåÉÏÅÚµ¯£¨Ô²ÇòµÄ£©¶ÑµÄ´óС£¬¾ÍÖªµÀÂòÀ´Á˶àÉÙÅÚµ¯¡£ºóÀ´ÑÝ»¯³ÉÒ»¸öÊýѧÄÑÌâ¡£KeplerÍÆ¶Ï£¨1611Äê£©ÍÆ¶Ï×îÃܵĶѻý·½Ê½ÊÇÃæÐÄÁ¢·½£¨fcc£©£¬¶Ñ»ýÂÊΪ0.7404 . . . £¬µ«Ã»ÓÐÖ¤Ã÷¡£¾Ý˵ºóÀ´Óиö»ªÈ˸ø³öÁËÖ¤Ã÷£¬µ«ºÜ¿ì±»ÈËÕÒ³öÁË©¶´¡£ ×î½üÔÚ¿´¡¶The pursuit of perfect packing¡·Õâ±¾Ê飬ÀïÃæ¸ÕºÃÓÐÏà¹Ø½éÉÜ£¬ºÜ¿ÆÆÕ£¬ºÜÓÐȤ¡£ [ Last edited by attractor on 2010-1-7 at 22:11 ] |

5Â¥2010-01-07 22:07:09
xiaohuang83
³¬¼¶°æÖ÷
![]()
![]()
![]()
![]()
- Ó¦Öú: 3 (Ó×¶ùÔ°)
- ½ð±Ò: 1783.5
- É¢½ð: 5
- ºì»¨: 1
- ɳ·¢: 1
- Ìû×Ó: 449
- ÔÚÏß: 147.5Сʱ
- ³æºÅ: 963099
- ×¢²á: 2010-03-06
- ÐÔ±ð: GG
- רҵ: ¼ÆËãÊýѧÓë¿ÆÑ§¹¤³Ì¼ÆËã

6Â¥2010-03-11 20:47:56
cpeng001
³¬¼¶°æÖ÷
![]()
![]()
![]()
![]()
- ÊýѧEPI: 1
- Ó¦Öú: 0 (Ó×¶ùÔ°)
- ½ð±Ò: 1481.3
- Ìû×Ó: 170
- ÔÚÏß: 79.2Сʱ
- ³æºÅ: 853731
- ×¢²á: 2009-09-22
- רҵ: ·ºº¯·ÖÎö
¡ï
javeey(½ð±Ò+1):¶àл½»Á÷£¡»¶Ó³£À´:) 2010-03-14 17:38
javeey(½ð±Ò+1):¶àл½»Á÷£¡»¶Ó³£À´:) 2010-03-14 17:38
| NatureÉÏÓÐÆªÎÄÕ£¬¾Ý˵½â¾öÁË´ËÎÊÌ⣬ÁíÍ⣬ ½üÄêAnn MathÒ²ÓÐÏà¹ØµÄ½á¹û |
7Â¥2010-03-12 08:38:59














»Ø¸´´ËÂ¥