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61.
《Stochastic Processes and their Applications》2014,124(5):1974-2002
In this paper we prove the local existence and uniqueness of solutions for a class of stochastic fractional partial differential equations driven by multiplicative noise. We also establish that for this class of equations adding linear multiplicative noise provides a regularizing effect: the solutions will not blow up with high probability if the initial data is sufficiently small, or if the noise coefficient is sufficiently large. As applications our main results are applied to various types of SPDE such as stochastic reaction–diffusion equations, stochastic fractional Burgers equation, stochastic fractional Navier–Stokes equation, stochastic quasi-geostrophic equations and stochastic surface growth PDE. 相似文献
62.
本文研究了受迫Kdv-Burgers方程Cauchy问题的唯一性,稳定性以及该问题解的blow-up性质。 相似文献
63.
Yongki Lee 《Journal of Differential Equations》2019,266(1):580-599
We identify sub-thresholds for finite time shock formation in a class of non-local conservation law with concavity changing flux. From a class of non-local conservation laws, the Riccati-type ODE system that governs a solution's gradient is obtained. The changes in concavity of the flux function correspond to the sign changes in the leading coefficient functions of the ODE system. We identify the blow up condition of this structurally generalized Riccati-type ODE. The method is illustrated via the traffic flow models with nonlocal-concave-convex flux. The techniques and ideas developed in this paper is applicable to a large class of non-local conservation laws. 相似文献
64.
Uri Elias 《Journal of Mathematical Analysis and Applications》2006,318(1):305-322
Critical points at infinity for autonomous differential systems are defined and used as an essential tool. Rn is mapped onto the unit ball by various mappings and the boundary points of the ball are used to distinguish between different directions at infinity. These mappings are special cases of compactifications. It is proved that the definition of the critical points at infinity is independent of the choice of the mapping to the unit ball.We study the rate of blow up of solutions in autonomous polynomial differential systems of equations via compactification methods. To this end we represent each solution as a quotient of a vector valued function (which is a solution of an associated autonomous system) by a scalar function (which is a solution of a related scalar equation). 相似文献
65.
该文在二维空间中研究了一类耦合非线性Klein-Gordon方程组的初值问题.首先用变分法证明了具基态的驻波的存在性;其次根据这个结果证明了该初值问题解爆破和整体存在的最佳条件;最后证明了具基态的驻波的不稳定性. 相似文献
66.
非局部反应扩散方程的临界爆破指标 总被引:3,自引:0,他引:3
本文证明了一类来源于燃烧理论的非局部反应扩散方程的临界爆破指标的存在性,而且临界指标属于爆破情形 相似文献
67.
具Gilbert耗散项的多变量铁磁链旋方程组解的Blow Up 总被引:1,自引:0,他引:1
本文考虑具Gilbert耗散项的多变量铁磁链旋方程组 Z_t=εLZ-αZ×(Z×LZ) βZ×LZ f(x,Z)Z初边值问题 Z|_=0, t≥0 Z(x,0)=Z_0(x), x∈ΩR~m强解的Blow Up.这里Z(x,t)=(u(x,t),v(x,t),w(x,t)),L=sum from i,j=1 to nε>0,α>0.采用Galerkin方法和紧致性原理证明局部强解的存在性,利用凸性方法证明强解的Blow Up性质。 相似文献
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