一类奇异扩散方程解的渐近性质 |
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引用本文: | 柳文清,潘佳庆.一类奇异扩散方程解的渐近性质[J].厦门水产学院学报,2009(4):415-417. |
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作者姓名: | 柳文清 潘佳庆 |
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作者单位: | 集美大学理学院,福建厦门361021 |
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基金项目: | 福建省自然科学基金资助项目(2008J0198) |
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摘 要: | 讨论了一类奇异扩散方程ut=Δu^m+f(u)具齐次Neumann边值条件解的渐近性质.结果表明:1)若f(u)=-u^α,且u(x,t)是该问题在QT上的解,则t≤T0,此处T0=(max u0 x∈Ω)^1-α/(1-α) ;2)存在正常数c1,δ1,c2,δ2,使得‖▽u^m‖L^2(Ω)≤c1e^-δ1t以及‖u‖L^2(Ω)≤c2e^-δ2t.
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关 键 词: | 非线性 奇异扩散 齐次Neumann边值 解的熄灭 |
rhe Asymptotic of the Solution of a Singular Diffusion Equation |
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Authors: | LIU Wen-qing PAN Jia-qing |
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Institution: | (School of Sciences, Jimei University, Xiamen 361021, China) |
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Abstract: | The nature of the asymptotic of the solution of a kind of singular diffusion equation ut=Δu^m+f(u) with a homogeneous Neumann boundary conditions was discussed. The main results were: 1) f(u)=-u^α,and u(x,t) was the solution of this question in QT, then t ≤ T0, here T0=(max u0 x∈Ω)^1-α/(1-α) ; 2) There existed positive constants c1,δ1,c2,δ2, causing ‖▽u^m‖L^2(Ω)≤c1e^-δ1t and ‖u‖L^2(Ω)≤c2e^-δ2t. |
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Keywords: | nonlinear singular diffusion homogeneous Neumann boundary value extinguishment ofsolution |
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