主要介绍了随机Logistic 方程和随机差分方程的研究背景, 一些预

备知识, 包括文中用到的的一些记号和理论基础 同时又简单介绍了以往的相

关研究结果, 以及本文定理证明所用到的定义。-we introduce to some

background of stochastic logistic equations and stochastic difference equations. Some

preliminary is prepared which include some notations and basic theory that we want

to use, also, we introduce to some related results in the past and the definitions and

lemma that we apply to proof the theorem in this paper.