²é¿´: 1793  |  »Ø¸´: 8
µ±Ç°Ö»ÏÔʾÂú×ãÖ¸¶¨Ìõ¼þµÄ»ØÌû£¬µã»÷ÕâÀï²é¿´±¾»°ÌâµÄËùÓлØÌû

ÄäÃû

Óû§×¢Ïú (³õÈëÎÄ̳)

±¾Ìû½öÂ¥Ö÷¿É¼û

» ²ÂÄãϲ»¶

» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:

ÒÑÔÄ   ͬ·½Ïò¹ã²¥   ÉêÇëÎïÀíEPI   »Ø¸´´ËÂ¥   ±à¼­   ²é¿´ÎÒµÄÖ÷Ò³

zhengyongyb

½ð³æ (ÕýʽдÊÖ)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¡ï ¡ï ¡ï
¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
LoveDirac: ½ð±Ò+3, ¡ïÓаïÖú, лл£¡ 2014-05-11 18:06:17
¼òµ¥µÄ·ÖÀë±äÁ¿·¨
5Â¥2014-05-10 12:09:07
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
²é¿´È«²¿ 9 ¸ö»Ø´ð

sciencejoy

гæ (ÖøÃûдÊÖ)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¡ï ¡ï ¡ï ¡ï ¡ï
¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
LoveDirac: ½ð±Ò+5, ¡ïÓаïÖú, лл£¡ 2014-05-11 18:03:14
ÕÒ±¾ÊýѧÎïÀí·½·¨¿´¿´¾Í¶®ÁË
2Â¥2014-05-09 16:55:04
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

postgradu

гæ (СÓÐÃûÆø)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¡ï ¡ï
¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
LoveDirac: ½ð±Ò+2, лл£¡ 2014-05-11 18:05:28
¸öÈ˸оõÊÇÊÔ³öÀ´µÄ£¡ÓÐÈ˶ÔÊýѧʽ½ÏÊìϤ£¬Í¨¹ý¹Û²ì²»Í¬Ê½×ÓµÄÌØÐԺͱ˴Ë×éºÏ£¬µÃµ½ÊÔ̽½â£¬½«ÊÔ̽½â´úÈëÀ©É¢·½³Ì£¬±È½ÏÁ½±ßµÈʽÊÇ·ñ³ÉÁ¢¡£½«Ê½¶þ´úÈëʽһÊdzÉÁ¢µÄ£¬¹Êʽ¶þΪʽһµÄ½â¡£

[ ·¢×ÔÊÖ»ú°æ http://muchong.com/3g ]
3Â¥2014-05-09 18:48:10
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

peterflyer

ľ³æÖ®Íõ (ÎÄѧ̩¶·)

peterflyer


¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï
¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
LoveDirac: ½ð±Ò+10, ¡ï¡ï¡ïºÜÓаïÖú, лл£¡ 2014-05-11 18:04:31
LoveDirac: ½ð±Ò+5, ¡ï¡ï¡ïºÜÓаïÖú, лл£¡ 2014-05-11 18:05:50
Áîu=¦È/sqrt(t)
PP/Pt=dP/du*Pu/Pt=dP/du*¦È*(-1/2)*t^(-3/2)
PP/P¦È=dP/du*Pu/P¦È=t^(1/2)*dP/du
P^2P/P¦È^2=t^(1/2)*d^2*/du^2*Pu/P¦È=t*d^2*/du^2
´úÈëÔ­·½³Ì£º
dP/du*¦È*(-1/2)*t^(-3/2)=D*t*d^2*/du^2
D*d^2*/du^2+1/2*u*dP/du=0
ÁîdP/du=y£¬
D*dy/du+1/2*u*y=0
dLny=-1/(2*D)*u*du=d[LnA'-1/(4*D)*u^2]
Lny=LnA'-1/(4*D)*u^2
y=dP/du=A'*e^[-1/(4*D)*u^2]
P=B+Integral{A'*e^[-1/(4*D)*¦Î^2]*d¦Î ,0,u}
=B+A'' *Integral{e^[-¦Ç^2]*d¦Ç£¬0£¬¦È/[2*sqrt(D*t)]}
=B+A*erf{¦È/[2*sqrt(D*t)]}
A¡¢B¾ùΪ»ý·Ö³£Êý¡£
4Â¥2014-05-09 21:04:07
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] 08¹¤¿Æ 320×Ü·Ö Çóµ÷¼Á +6 À滨çóÍí·ç 2026-03-17 6/300 2026-03-21 03:40 by JourneyLucky
[¿¼ÑÐ] Ò»Ö¾Ô¸ Î÷±±´óѧ £¬070300»¯Ñ§Ñ§Ë¶£¬×Ü·Ö287£¬Ë«·ÇÒ»±¾£¬Çóµ÷¼Á¡£ +3 ³¿»èÏßÓëÐǺ£ 2026-03-18 3/150 2026-03-21 00:46 by JourneyLucky
[¿¼ÑÐ] Ò»Ö¾Ô¸ÖØÇì´óѧ085700×ÊÔ´Óë»·¾³×¨Ë¶£¬×Ü·Ö308Çóµ÷¼Á +3 īīĮ 2026-03-18 3/150 2026-03-21 00:39 by JourneyLucky
[¿¼ÑÐ] 296Çóµ÷¼Á +6 www_q 2026-03-18 10/500 2026-03-20 23:56 by JourneyLucky
[¿¼ÑÐ] 274Çóµ÷¼Á +10 S.H1 2026-03-18 10/500 2026-03-20 23:51 by JourneyLucky
[¿¼ÑÐ] ±¾ÈË¿¼085602 »¯Ñ§¹¤³Ì ר˶ +19 ²»ÖªµÀ½Ðʲô£¡ 2026-03-15 21/1050 2026-03-20 20:48 by zhukairuo
[¿¼ÑÐ] Ò»Ö¾Ô¸»ªÖÐũҵ071010£¬×Ü·Ö320Çóµ÷¼Á +3 À§À§À§À§À¤À¤ 2026-03-20 3/150 2026-03-20 20:38 by ѧԱ8dgXkO
[¿¼ÑÐ] 260Çóµ÷¼Á +3 ÖìÜÆÁÕ 2026-03-20 3/150 2026-03-20 20:35 by ѧԱ8dgXkO
[¿¼ÑÐ] 353Çóµ÷¼Á +3 À­¹³²»Ðí±ä 2026-03-20 3/150 2026-03-20 19:56 by JourneyLucky
[¿¼ÑÐ] »·¾³¹¤³Ìµ÷¼Á +9 ´ó¿Édigkids 2026-03-16 9/450 2026-03-20 17:38 by ×íÔÚ·çÀï
[¿¼ÑÐ] ²ÄÁÏÓ뻯¹¤Çóµ÷¼Á +7 Ϊѧ666 2026-03-16 7/350 2026-03-19 14:48 by ¾¡Ë´Ò¢1
[¿¼ÑÐ] 346Çóµ÷¼Á[0856] +3 WayneLim327 2026-03-16 6/300 2026-03-19 11:21 by WayneLim327
[¿¼ÑÐ] Ò»Ö¾Ô¸985£¬±¾¿Æ211£¬0817»¯Ñ§¹¤³ÌÓë¼¼Êõ319Çóµ÷¼Á +10 Liwangman 2026-03-15 10/500 2026-03-19 10:25 by Î޼ʵIJÝÔ­
[¿¼ÑÐ] 0817µ÷¼Á +3 ûÓдð°¸_ 2026-03-14 3/150 2026-03-19 09:51 by Xu de nuo
[¿¼ÑÐ] ²ÄÁÏר˶306Ó¢Ò»Êý¶þ +10 z1z2z3879 2026-03-16 13/650 2026-03-18 14:20 by 007_lilei
[¿¼ÑÐ] ÉúÎïѧ071000 329·ÖÇóµ÷¼Á +3 ÎÒ°®ÉúÎïÉúÎﰮΠ2026-03-17 3/150 2026-03-18 10:12 by macy2011
[¿¼ÑÐ] 308Çóµ÷¼Á +4 ÊÇLupa°¡ 2026-03-16 4/200 2026-03-17 17:12 by ruiyingmiao
[¿¼ÑÐ] 0856Çóµ÷¼Á +3 ÁõÃÎ΢ 2026-03-15 3/150 2026-03-16 10:00 by houyaoxu
[¿¼ÑÐ] 327Çóµ÷¼Á +6 ʰ¹âÈÎȾ 2026-03-15 11/550 2026-03-15 22:47 by ʰ¹âÈÎȾ
[¿¼ÑÐ] 080500£¬²ÄÁÏѧ˶302·ÖÇóµ÷¼ÁѧУ +4 ³õʶ¿ÉÀÖ 2026-03-14 5/250 2026-03-14 21:08 by peike
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û