Permanence and positive periodic solution of a periodic predator-prey model;

Existence of positive periodic solutions for Holling Ⅱ type functional response systems with impulse;

A positive periodic solution to Rosenzweig-Macarthur model;

Using a fixed point theorem of decreasing operator,we show the existence of unique ω-periodic positive solution x~ of Lasota-Wazewska model.

Existence of periodic positive solution in two-dimensional non-autonomous multi-delay competition system are obtained by means of topological degree and operator theory.

Existence and multiplicity of positive periodic solutions for a class of differential equation with distributed delay;

Existence of positive periodic solutions to a class of functional differential equations with Impulse Effects;

By the bootstrap,we study the upper and lower solutions mothed of the existence of positive periodic solutions and asymptotic behavior of general time-dependent solutions for Logistic equation with time delay with nonlocal boundary value conditions.

Positive periodic solution of a time-delay predator-prey system with impulsive stocking;

It is shown that model is uniform persistence under some appropriate conditions,sufficient conditions are established the existence of a positive periodic solution which is global asymptotic stability by differential inequality and lyapunov functional.

The existence of the strictly positive periodic solution of the system is proved by using coincidence degree.