A general model of random walk in time-random environment in any denumerable space is established.
文章在可数状态空间中建立了时间随机环境下随机游动的一个广泛的模型。
2
The hydrogeological structure model which represents the space structure of the hydro geological unit and the spatial distribution of aquifers, is the basement of groundwater and environment research.
水文地质结构模型是表现水文地质体的空间结构及含水层空间分布的模型，是地下水及与环境研究的基础。
3
Then we introduce the organization model based on the knowledge space theory and analyze the awareness information in the CSCL environment.