排序方式: 共有66条查询结果,搜索用时 109 毫秒
61.
Geoffrey Recktenwald 《International Journal of Non》2005,40(9):1160-1170
Coexistence phenomenon refers to the absence of expected tongues of instability in parametrically excited systems. In this paper we obtain sufficient conditions for coexistence to occur in the generalized Ince equation
62.
竞争性生态系统中两物种的共存问题 总被引:1,自引:1,他引:0
利用Banach空间中锥与半序理论研究了竞争性生态系统中两物种的共存问题,得出依赖于某一共同生存环境的两物种在一定条件下必可达唯一共存状态. 相似文献
63.
This paper is concerned with the dynamics of a two-species reaction–diffusion–advection competition model subject to the no-flux boundary condition in a bounded domain. By the signs of the associated principal eigenvalues, we derive the existence and local stability of the trivial and semi-trivial steady-state solutions. Moreover, the nonexistence and existence of the coexistence steady-state solutions stemming from the two boundary steady states are obtained as well. In particular, we describe the feature of the coincidence of bifurcating coexistence steady-state solution branches. At the same time, the effect of advection on the stability of the bifurcating solution is also investigated, and our results suggest that the advection term may change the stability. Finally, we point out that the methods we applied here are mainly based on spectral analysis, perturbation theory, comparison principle, monotone theory, Lyapunov–Schmidt reduction, and bifurcation theory. 相似文献
64.
65.
F. de J. Guevara-Rodríguez 《Fluid Phase Equilibria》2011,307(2):190-196
A method to define the Cubic Equation of State (CES) of a simple substance is presented in this work. CES is constructed with only three parameters of the fluid, namely, the critical compressibility Zc≡Pcvc/RTc, the acentric factor ω ≡ − log (P(sat)/Pc) − 1 (where P(sat) is the saturated vapor pressure), and the saturated vapor volume v(sat) at the temperature T(sat)/Tc = 0.7 (where Tc is the critical temperature, vc is the critical volume, and Pc is the critical pressure). The resulting CES is unique for each substance and, in general, it is different from other known CES in the literature. 相似文献
66.