Change of age structure of population and its relationship to develop ment of health business in Henan province;

The changes of the catch and age structure of lake anchovy and the relationship with environmental variation in Lake Taihu;

Age estimation and age structure of Cycas fairylakea population in Shenzhen City;

Optimal control of population dynamic system with age-structure in periodic environment;

Optimal Harvesting for Time-varying Population Dynamics with Spatial Diffusion and Age-structure;

The existence and uniqueness of nonnegative solutions of an age-structured MSEIR epidemic model with vaccination;

According to the observation in the field from January 1997 to December 2000,the age composition and dynamics of Macaca mulatta population in Neilingding Island were studied .

The age composition is as follows:Adult, 79.

Asymptotic behavior of a nonlinear infection-age-dependentepidemic model;

Non-linear age-dependent population models;

This paper is mainly concerned with optimal harvesting policy for three competing species with age-dependent and diffusion.

The Stability of a Diffusive Predator-prey Model with Stage-structure;

This paper studied a two-species delayed stage-structured competitive model.

The stability of the positive constant solution of the competitive model with stage-structure and diffusion under Neumann boundary condition is discussed.

In this paper,we establish a kind of new class age-structure SEIR epidemic model with impulsive vaccination and nonlinear infectivity,which contains ODEs and PDEs at the same time.