The tree of this paper is as follows : in chapter 2 , we study the uniformly asymptotic stability of the trivial solutions of a class of linear and nonlinear difference - differential equations with finite time - dependent delays . then , we deal with the existence , the uniqueness and the stability of periodic solutions and almost periodic solutions when the systems are under periodic perturbations and almost periodic perturbations 本文內(nèi)容具體安排如下:第二章,我們首先研究一類具有限變時(shí)滯的線性及非線性差分微分方程系統(tǒng)的零解的一致漸近穩(wěn)定性,然后討論在周期擾動(dòng)和概周期擾動(dòng)下,相應(yīng)系統(tǒng)的周期解和概周期解的存在唯一性及穩(wěn)定性。