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two-predators-one-prey
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     Two.
     二.
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     Two.
     二、末日意识
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     TWO FOR ONE
     以一当二
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     ③none of the two.
     ③无浅染末端和随体。
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     Two-color Photodetectors
     双波段光电探测器
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In this paper, we study a two-predator one-prey ecosystem with Holling's type Ⅰ functional response, The conditions of persistence and extinction areobtained. From two respect, meaning of ecology is given, we point out some problem awaiting solution in this system.

摘要本文研究了由两个捕食种群和一个食饵种群组成的第一类功能反应三种群系统的种群幸存和灭绝的状态,并作了生态学方面的讨论。

In this paper,a nonautonomous two predators-one prey diffusive system is considered in which one of three species can diffuse between tow patches.while the others are confined to one patch and cannot diffuse.It is proved that the system can be made persistent under some appropriate conditions,further,if it is almost periodic system,it can have a unique almost positive periodic solution by using compassion theorem and V-function method.

本文考虑了一个非自治的扩散的捕食者一食饵系统,种群之一可以在两块斑块间扩散,其他两种则限定于一块斑块,不能扩散.本文证明了在某些适当的条件下,该系统可以保持持久性,更进一步,如果它是概周期的,可以利用比较定理和V-函数方法,得到它的唯一的正概周期解.

Aim Quasisolutions and global attractor of the steady-state system were investigated for a class of semi-linear parabolic system with homogeneous Dirichlet boundary conditions,which arises in an ecological problem of two-predator and one-prey model.Methods The upper-lower solutions,monotone derivative methods,the maximum principle,comparison principle and principal eigenvalue theory were used.Results The quasisolutions of the steady-state system for two-predator-one-prey model were obtained.Conclusion There...

Aim Quasisolutions and global attractor of the steady-state system were investigated for a class of semi-linear parabolic system with homogeneous Dirichlet boundary conditions,which arises in an ecological problem of two-predator and one-prey model.Methods The upper-lower solutions,monotone derivative methods,the maximum principle,comparison principle and principal eigenvalue theory were used.Results The quasisolutions of the steady-state system for two-predator-one-prey model were obtained.Conclusion There is a global attractor of the three-species model systems with an arbitrary nontrivial,nonnegative initial value.

目的研究一类具有齐次Dirichlet边界条件的抛物系统的全局吸引子及其对应的平衡态系统的拟解,该问题产生于生态学中三物种捕食-食饵模型。方法采用上下解的方法、单调迭代法、比较原理、极值原理以及特征值理论进行了研究。结果得到了这类捕食-食饵模型平衡态系统的拟解。结论对任意非平凡非负初值,上述三物种模型具有全局吸引子。

 
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