Analyzes the occurrence cause of debris flow in Fengcheng, discusses the classification and characteristicsof debris flow, points out the damage of debris flow and material prevention methods.
On basis of above work, the foundational theory including definition and classification which is fit for the characteristicsof maintainability design is discussed.
在此基础上，探讨了适合于维修性设计自身特点的维修性约束和维修性冲突的定义、分类等基础理论。
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This paper analyzed the characteristicsof the software component Category, and introduced the faceted classificationof domain characteristics with the help of domain engineering.