Znn3bq.jpeg
²é¿´: 4370  |  »Ø¸´: 4
µ±Ç°Ö»ÏÔʾÂú×ãÖ¸¶¨Ìõ¼þµÄ»ØÌû£¬µã»÷ÕâÀï²é¿´±¾»°ÌâµÄËùÓлØÌû

Â¥1970-01-01 08:00:00
ÒÑÔÄ   ÉêÇëÊýѧEPI   »Ø¸´´ËÂ¥   ±à¼­   ²é¿´ÎÒµÄÖ÷Ò³

wshaoxin

Ìú¸Ëľ³æ (ÕýʽдÊÖ)

¡ï
Сľ³æ: ½ð±Ò+0.5, ¸ø¸öºì°ü£¬Ð»Ð»»ØÌû
ÈÎÒâ¶Ô³Æ¾ØÕó¶¼ÊÇ¿ÉÒÔÓ϶Խǻ¯µÄ¡£
Godhelpsthosewhohelpthemselves!
4Â¥2013-09-21 12:28:43
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
²é¿´È«²¿ 5 ¸ö»Ø´ð

xxka

ľ³æ (СÓÐÃûÆø)

¡ï
Сľ³æ: ½ð±Ò+0.5, ¸ø¸öºì°ü£¬Ð»Ð»»ØÌû
P1,P2ÊÇͶӰ¾ØÕ󣨶ԳÆÃݵȣ©,Ôò´æÔÚÕý½»ÕóTÒÔ¼°¶Ô½ÇÔªËØÎª1¡¢0µÄ¶Ô½ÇÕóA1¡¢A2ʹµÃ
T¡¤P1T=A1£»T¡¤P2T=A2£»ËùÒÔT¡¤£¨P1-P2£©T=A1-A2£¬ÇÒA1-A2·Ç¸º¶¨£¬¼´A1-A2Ϊ½ÇÔªËØÎª1¡¢0µÄ¶Ô½ÇÕó
ËùÒÔ A1A2=A2£¬½ø¶ø¿ÉÖ¤½áÂÛ
2Â¥2013-09-20 23:45:50
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

hank612

ÖÁ×ðľ³æ (ÖøÃûдÊÖ)

¡ï
Сľ³æ: ½ð±Ò+0.5, ¸ø¸öºì°ü£¬Ð»Ð»»ØÌû
ÎÒ²»Ã÷°×P, Q Ϊʲô¿ÉÒÔͬʱ¶Ô½Ç»¯(µ±²»ÖªµÀP, Q ¿É½»»»µÄʱºò).

Éè 0 <= ( (P-Q) Qx, Qx ) =( (P-I)Qx, Qx )
          = - ( (I-P) Qx, Qx) = - || (I-P) Qx||^2
Òò´Ë (I-P)Q =0. ¼´ Q=PQ.

ͬÀí, 0 >= ( (Q-P) (I-P)y, (I-P)y ) = (Q(I-P)y, (I-P)y) = ||Q(I-P) y||^2  
¿ÉÍÆ³ö Q(I-P)=0, ¼´ Q=QP.
We_must_know. We_will_know.
3Â¥2013-09-21 00:41:02
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

shy1992331

гæ (СÓÐÃûÆø)

ÒýÓûØÌû:
2Â¥: Originally posted by xxka at 2013-09-20 23:45:50
P1,P2ÊÇͶӰ¾ØÕ󣨶ԳÆÃݵȣ©,Ôò´æÔÚÕý½»ÕóTÒÔ¼°¶Ô½ÇÔªËØÎª1¡¢0µÄ¶Ô½ÇÕóA1¡¢A2ʹµÃ
T¡¤P1T=A1£»T¡¤P2T=A2£»ËùÒÔT¡¤£¨P1-P2£©T=A1-A2£¬ÇÒA1-A2·Ç¸º¶¨£¬¼´A1-A2Ϊ½ÇÔªËØÎª1¡¢0µÄ¶Ô½ÇÕó
ËùÒÔ A1A2=A2£¬½ø¶ø¿ÉÖ¤½áÂÛ

ÏëÎÊÒ»ÏÂΪʲôP1£¬P2¿ÉÒÔͬʱ¶Ô½Ç»¯°¡£¿Ð»Ð»ÁË
5Â¥2013-09-27 21:04:28
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] 297£¬¹¤¿Æµ÷¼Á?ºÓÄÏũҵ´óѧ±¾¿Æ +14 ºÓÄÏũҵ´óѧ-ÄÜ 2026-04-14 14/700 2026-04-16 14:41 by dingyanbo1
[¿¼ÑÐ] 307ÖÐÒ½¿¼Ñе÷¼Á +5 ÓÚÒÔ²ÉÞÀ 2026-04-14 5/250 2026-04-16 10:40 by dick_runner
[¿¼ÑÐ] Ò»Ö¾Ô¸AÇø211£¬22408 321Çóµ÷¼Á +6 ËæÐÄËùÓû¡î 2026-04-15 7/350 2026-04-15 21:45 by lbsjt
[¿¼ÑÐ] ͨÐŹ¤³ÌÇóµ÷¼Á£¡£¡£¡ +6 zlb770521 2026-04-14 6/300 2026-04-15 20:00 by ѧԱJpLReM
[¿¼ÑÐ] 335Çóµ÷¼Á +19 ÏëÉϰ¶Ñ½£¡£¡ 2026-04-12 21/1050 2026-04-14 16:23 by Art1977
[¿¼ÑÐ] Ò»Ö¾Ô¸»¦9£¬326ÇóÉúÎïѧµ÷¼Á +10 Áõīī 2026-04-13 10/500 2026-04-14 15:16 by zs92450
[¿¼ÑÐ] 245Çóµ÷¼Á +6 ±ùÌÇéÙ?ÆûË® 2026-04-13 10/500 2026-04-14 10:49 by jyl0317
[¿¼ÑÐ] Ò»Ö¾Ô¸¹þ¹¤´ó 085600 277 12²Ä¿Æ»ùÇóµ÷¼Á 5+5 chenny174 2026-04-10 37/1850 2026-04-14 07:39 by Abskk
[¿¼ÑÐ] Ò»Ö¾Ô¸»ªÄÏÀí¹¤´óѧ331·Ö²ÄÁÏÇóµ÷¼Á +10 ÌìÏÂww 2026-04-09 11/550 2026-04-13 23:25 by pies112
[¿¼ÑÐ] 0856ר˶Çóµ÷¼Á Ï£ÍûÊÇaÇøÔºÐ£ +24 ºÃºÃÐÝÏ¢ºÃ²»ºÃ 2026-04-09 27/1350 2026-04-13 22:22 by pies112
[¿¼ÑÐ] 293Çóµ÷¼Á +16 ÎÒ°®¸ßÊý¸ßÊý°®Î 2026-04-12 18/900 2026-04-13 21:47 by ѧԱJpLReM
[¿¼ÑÐ] ÉúÎïѧµ÷¼Á +11 СȽҪŬÁ¦ 2026-04-10 13/650 2026-04-13 11:46 by µç»¯Ñ§¼°´ß»¯
[¿¼ÑÐ] 284Çóµ÷¼Á +11 archer.. 2026-04-09 12/600 2026-04-11 20:23 by À¶ÔÆË¼Óê
[¿¼ÑÐ] Çóµ÷¼Á +11 ôæôæÒ»ÊéÉú 2026-04-09 11/550 2026-04-11 19:57 by ÄæË®³Ë·ç
[¿¼ÑÐ] Çóµ÷¼Á£¬Ò»Ö¾Ô¸´óÁ¬Àí¹¤´óѧ354·Ö +5 ÓêÉùÓàÉú 2026-04-11 6/300 2026-04-11 16:12 by ÓêÉùÓàÉú
[¿¼ÑÐ] 22408 352·ÖÇóµ÷¼Á0854Àà +4 ŬÁ¦µÄÏÄÄ© 2026-04-09 4/200 2026-04-11 09:57 by zhq0425
[¿¼ÑÐ] ¿¼Ñе÷¼Á +26 ˶ÐǸ° 2026-04-09 27/1350 2026-04-10 22:24 by Öí»á·É
[¿¼ÑÐ] Çóµ÷¼Á +5 ²»»á·ÉµÄÓã@ 2026-04-10 5/250 2026-04-10 19:07 by chemisry
[¿¼ÑÐ] 314Çóµ÷¼Á +18 xhhdjdjsjks 2026-04-09 19/950 2026-04-10 18:53 by HPUCZ
[¿¼ÑÐ] ±¾9 Ò»Ö¾Ô¸Î÷¹¤´ó085601 324Çóµ÷¼Á +5 wysyjs25 2026-04-10 5/250 2026-04-10 16:57 by luoyongfeng
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û