he existence and stability of the nontrivial and nonnegative steady-state solution of an ecological predator-prey system with the reaction-diffusion term are discussed.

The existence and uniqueness of nonnegative solution for a class of age-structured SEIR epidemic model;

By using pure analysis method,are proved the monotone stability,existence and uniqeness of a dynamic state nonnegative solution of a repairable syatem with some singleness components.

This paper deals with the existence of nonnegative solutions to boundary value problems 1p(t)(p(t)y′(t))′+a(t)f(t,y(t))=0, lim t→0+ p(t)y′(t)=0=y(1) where p∈C 1 (0,1) with p>0 on (0,1),f≥0,f(t,y) is nonincreasing with respect to t for each fixed y and nondecreasing with respect to y for each fixed t, and a∈C(0,1) may change sign.

By elementary methods,it is proved that there is uniqueness of non-negative solution to the redundant syste

In this paper, firstly we study of the existence and uniqueness a dynamie state non-negative solution the complex repairable system by semigroups of operators theory, further we prove that 0 is the simple eigenvalue of the system.

This paper studies the repairable computer system with hardware and software components,and in the assumption that the hardware and software repair such as new,By pure analysis method,we proved the existence and uniqueness of a dynamic state non-negative strong solution of a series repairable computer system with hardware and software.

By pure analysis method and added variable method,this paper proved the existence and uniqueness of a dynamic state non-negative strong solution of a series repairable computer system with hardware and software.