共查询到20条相似文献,搜索用时 109 毫秒
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This paper aims at providing an alternative approach to study global dynamic properties for a two-species chemotaxis model, with the main novelty being that both populations mutually compete with the other on account of the Lotka–Volterra dynamics. More precisely, we consider the following Neumann initial–boundary value problem in a bounded domain , with smooth boundary, where are positive constants.When and , it is shown that under some explicit largeness assumptions on the logistic growth coefficients and , the corresponding Neumann initial–boundary value problem possesses a unique global bounded solution which moreover approaches a unique positive homogeneous steady state of above system in the large time limit. The respective decay rate of this convergence is shown to be exponential.When and , if is suitable large, for all sufficiently regular nonnegative initial data and with and , the globally bounded solution of above system will stabilize toward as in algebraic. 相似文献
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In this paper, we consider the blow-up of solutions to a class of quasilinear reaction–diffusion problems where is a bounded convex domain in , weighted nonlocal source satisfies and and are positive constants. By utilizing a differential inequality technique and maximum principles, we establish conditions to guarantee that the solution remains global or blows up in a finite time. Moreover, an upper and a lower bound for blow-up time are derived. Furthermore, two examples are given to illustrate the applications of obtained results. 相似文献
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In this paper, we execute elementary row and column operations on the partitioned matrix into to compute generalized inverse of a given complex matrix , where is a matrix such that and . The total number of multiplications and divisions operations is and the upper bound of is less than when . A numerical example is shown to illustrate that this method is correct. 相似文献
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Juntang Ding 《Computers & Mathematics with Applications》2013,65(11):1808-1822
In this paper we discuss the blow-up for classical solutions to the following class of parabolic equations with Robin boundary condition: where is a bounded domain of with smooth boundary . By constructing some appropriate auxiliary functions and using a first-order differential inequality technique, we derive conditions on the data which guarantee the blow-up or the global existence of the solution. For the blow-up solution, a lower bound on blow-up time is also obtained. Moreover, some examples are presented to illustrate the applications. 相似文献
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Global asymptotic stability of steady states in a chemotaxis-growth system with singular sensitivity
Pan Zheng Chunlai Mu Robert Willie Xuegang Hu 《Computers & Mathematics with Applications》2018,75(5):1667-1675
This paper deals with a fully parabolic chemotaxis-growth system with singular sensitivity under homogeneous Neumann boundary conditions in a smooth bounded domain , where the parameters and . Global existence and boundedness of solutions to the above system were established under some suitable conditions by Zhao and Zheng (2017). The main aim of this paper is further to show the large time behavior of global solutions which cannot be derived in the previous work. 相似文献
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Ke Wu 《Computers & Mathematics with Applications》2018,75(3):755-763
We consider the existence of ground state solutions for the Kirchhoff type problem where , and . Here we are interested in the case that since the existence of ground state for is easily obtained by a standard variational argument. Our method is based on a Pohoaev type identity. 相似文献
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In this work, we are interested in considering the following nonlocal problem where is a smooth bounded domain, and is the critical Sobolev exponent. By using the variational method and the critical point theorem, some existence and multiplicity results are obtained. 相似文献
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Fenglong Sun Lishan Liu Yonghong Wu 《Computers & Mathematics with Applications》2018,75(10):3685-3701
In this paper, we study the initial boundary value problem for a class of parabolic or pseudo-parabolic equations: where , with being the principal eigenvalue for on and . By using the potential well method, Levine’s concavity method and some differential inequality techniques, we obtain the finite time blow-up results provided that the initial energy satisfies three conditions: (i) ; (ii) , where is a nonnegative constant; (iii) , where involves the -norm or -norm of the initial data. We also establish the lower and upper bounds for the blow-up time. In particular, we obtain the existence of certain solutions blowing up in finite time with initial data at the Nehari manifold or at arbitrary energy level. 相似文献
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Soon-Yeong Chung 《Computers & Mathematics with Applications》2018,75(8):2915-2924
In this paper, we discuss and answer the following dichotomy problems: Let be a network and be a discrete -Laplace operator with .(i) If are functions satisfying then either on or in .(ii) If are functions satisfying then either on or in .We believe that this work is not only interesting in itself, but also gives a clue to solve the problems defined on the continuous domain. 相似文献
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Hong-Ying Li 《Computers & Mathematics with Applications》2018,75(8):2858-2873
In this work, we are interested in studying the following Kirchhoff type problem where is a smooth bounded domain, is the critical Sobolev exponent, , and with the set of positive measures, and with By the Nehari method and variational method, the existence of positive ground state solutions is obtained. 相似文献
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In this paper, we are concerned with the existence of positive radial solutions of the elliptic system where , is a constant, is a parameter and , is continuous and for all . Under some appropriate conditions on the nonlinearity , we show that the above system possesses at least one positive radial solution for any . The proof of our main results is based upon bifurcation techniques. 相似文献
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Daewook Kim Jong Yeoul Park Yong Han Kang 《Computers & Mathematics with Applications》2018,75(9):3269-3282
In this paper, we show the energy decay rate for a von Karman system with a boundary nonlinear delay term. This work is devoted to investigate the influence of kernel function and the effect of the boundary nonlinear term , a boundary nonlinear time delay term and prove energy decay rates of solutions when do not necessarily decay exponentially and the boundary condition has a time delay. 相似文献
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In this paper, we consider the following fractional Schrödinger–Poissonproblem where and , the potential is weakly differentiable and . By introducing some new tricks, we prove that the problem admits a ground state solution of Nehari–Pohozaev type under mild assumptions on and . The results here extend the existing study. 相似文献