作者jersam89 (123)
看板Grad-ProbAsk
标题[理工] [工数]PDE
时间Wed Feb 3 15:46:21 2010
1.
Ut + Ux = 0 t>0 x>0
u(0,t) = 2e^-3t
题目没给I.C
请教一下该怎麽算?
2.
Ut = 9Uxx 0<x<2 t>0
B.C u(0,t) = 0 u(2,t) = 0 t>0
I.C u(x,0) = x 0=< x =< 1
u(x,0) = 2-x 1< x =< 2
没碰过这样的题目
I.C分成两个范围??
3.
Uyx + 2Ux = x
u(0,y) = 0
ux(x,0) = x^2
请问Uyx是什麽??
我没看过...
谢谢噜
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