高阶半线性抛物型方程组的生命跨度

其中m,P,q>1．利用试验函数方法,首先推导一些积分不等式,然后对方程组爆破解的生命跨度 [0,T)给出估计．     

THE BLOW-UP PROPERTIES OF SOLUTIONS TO A PARABOLIC SYSTEM WITH LOCALIZED NONLINEAR REACTIONS

1IntroductionThispaperisconcernedwithpositivesolutionOfthesemilinearheatequationswithlocalizedreactionssubjecttoeitherinitialconditions(Cauchyproblem)ortheinitialandboundary-value(DirichletorNeumanntype)conditionswherenisaboundeddomaininRe,icEO.Equations(1.1)canbethoughtofasamodeltodescribesomephysicalphenomena(heatpropagation,chemicalreaction)inwhichthenonlinearreactionsinadynndcalsystemtakesplaceonlyatasinglesite.InthesequelforconvenienceweshallsamplycalltheCauchy,initial-Direchlet,orini…     

一个反应扩散方程的门槛结果

本文讨论反应扩散方程Ｃａｕｃｈｙ问题解的整体存在性，渐近性质和Ｂｌｏｗｕｐ问题．其中或者１＜ｑ＜ｐ＜＋∞，ｎ＝２．得到门槛结果．     

The blow-up rates for systems of heat equations with nonlinear boundary conditions

This paper deals with the blow-up rate estimates of positive solutions for systems of heat equations with nonlinear boundary conditions. The upper and lower bounds of blow-up rate are obtained.     

一类非线性退化波动方程解的爆破

考虑了有界区域上一类非线性退化波动方程的初边值问题.通过改进Vitillaro,Li和Tsai的方法,建立了非正的初始能量以及正的初始能量下解的爆破结果.同时,还给出了解的生命跨度估计.     

一个捕食椭圆型方程组正解的存在性、唯一性与稳定性

研究一个修正的Leslie-Gower和 Holling-Type II型的捕食模型的椭圆型方程组的齐次Dirichlet边值问题的正解. 给出了存在性、 唯一性、不存在性、分支和稳定性. 特别地, 得到了连接半平凡解和极限方程的唯一正解的连通分支.     

Belousov—Zhabotinskii化学反应Field—Noyes模型的整体吸引子和 …

本文讨论Ｂｅｌｏｕｓｏｖ－Ｚａｂｏｔｉｎｓｋｉｉ化学反应Ｆｉｅｌｄ－Ｎｏｙｅｓ模型整体吸引子的存在性，维数估计以及性流形的存在性。     

一类p-Laplace方程组的正径向解的存在性

本文研究p-Laplace方程组{-(rN-1(φ)(u'))'=λrN-1f(u,v), a＜r＜b,-(rN-1(φ)(v'))'=λrN-1g(u,v), a＜r＜b,u(a)=0=u(b),v(a)=0=v(b)的正解,其中参数λ＞o,(φ)是递增且同伦与R的奇映射,f,g∈[C[0,∞)]2满足适当的条件,讨论了当参数λ很大时正解的存在性.     

BLOW-UP OF POSITIVE SOLUTIONS OF A SEMILINEAR HEAT EQUATION

The initial value problem in R~n is discussed, where p>1. It is well known that the solution u(x, t) blows up in finite time for some initial values φ. In this paper, it is proved that the blow-up occurs only at point x=0 for some special initial values φ(x).